Aeronautics, No. 7 April 1914

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Official Organ and Bulletin—Aero Club of Pennsylvania The Aeronautical Society


Property of E. W. ROBISCHON

Some Competitive Trophies Won in 1913—With


THE MACKAY TROPHY, won by Lieutenants

j. E. Carberry and Fred Seydel, U. S Army ;

Hying 58 miles in 46 minutes. TIMES AERIAL DERBY, won by William S.

Luckey, flying around Manhattan; 60 miles in

52 minutes.

TIMES AERIAL DERBY, second, Charles F. Niles.

AERO and HYDRO 1,000-mile Cruise Trophy, won by J. B. R. Verplanck and Beckwith Havens; Chicago to Detroit.

MICHIGAN AERO CLUB 1,003-mile Speed Trophy, won by Verplanck and Havens; Chicago to Detroit.

Except by Their Products, the Curtiss Companies were not Directly Represented in Any of These Events

Ask for Our Catalogs

THE CURTISS MOTOR CO., 21 Lake Street, Hammondsport, N. Y.




Bosch Ignition

Gives Maximum Efficiency

JT is possible to obtain the maximum power from your engine only when your ignition system supplies efficient, never failing sparks that occur without lag. Bosch ignition systems are the type that will provide such ignition as is desired for the exacting work of aviation; they are dependable, efficient and long lived.

Be Satisfied Specify Bosch Correspondence Invited

Bosch MagnetoCompany

201 West 46th Street : New York



In the previous article ("AERONAUTICS, March 31st, page 85, line 8 from end), the .vord "assure" should be ''assume"

We assumed a ratio between kA and-^ and


railed it n ; and we found that the power, P,

vould then vary as ( — + Y). I suggested a

rial value for of 1000, when metric units are used and when Y is in metres per second; whereas, when English units are used md V is in miles per hour, n will be very lear 5000.

"P" here means the power delivered by the propeller; hut if the same propeller efficiency ;an be attained in machines of different speeds ,ve can substitute the horsepower of the en-ine for this value.

For direct-connected propellers the efficiency ncreases somewhat with increasing aeroplane ;peed: but for our present purpose we can all P the HP of engine.

morell tachometer

With the years of progress in automobiles came various devices of value or interest to be ■used in their operation, such as speedometers, clocks, average speed recorders, gasoline gauges, tachometers, radiator temperature thermometers, etc.

We have assumed also that the power varies as the weight. We have, therefore, for our expression of aeroplane efficiency

L—-p ( ^ + V) ; that is, the weight carried

per horsepower multiplied by what we may call the speed factor. This factor we may

write V (— + 1).

Now, no matter what speed unit we employ,

the numerical value of ( ^ +1) must be the

same for a given speed. We can, therefore, plot a curve with the values of V as abscissas,

and (--h 1) as ordinates. The value found


on this curve for any speed need then only be multiplied by V, in the desired units, to get the speed factor.

(To be Concluded.)

Every month new accessories are appearing for the use of aviators and balloonists. A revolution counter is frequently employed on the ground, but now we have an instrument which shows at all times when the machine is in flight the exact r.p.m. the propeller or engine is making, an instrument which may be placed at any convenient spot within the pilot's vision.

With increase in engine speed, the consumption of gasoline may run up out of proportion, depending on the form of the propeller and the resistance of the entire machine. The most economical speed can be ascertained and thereafter maintained by means of the Morell "Phy-lax" tachometer, handled in this country by Schuchardt & Schutte, of 90 West street, New York. The illustration shows this instrument, which sells here, duty paid, for $32. With the clock, it may be had for $41.

Now a word as regards Mr. Sperry's criticism of my lecture given in New York October 14 (see p. 210, December AERONAUTICS, 1913). 1 am glad Air. Sperry wrote as he did. His criticism was necessary because in my lecture I did not make plain the fact that I was considering only the direction of the couples and not their magnitude and I did not state as I should have done why I believe the righting couple should reside in the supporting surfaces and not in a tail.

The example given by Mr. Sperry is not fairly chosen. He chooses as an upsetting couple a change from 50 to 8°. He should work it out on a basis of the maximum upsetting couple, that is, from o° to 160. He would then have a movement of the c. of p. (for a Bleriot wing) of 30% of the chord instead of 2l/2ac. Now, while the tail can take care of this, there is a lag in the introduction of the righting couple which is bad. First the gust strikes the main surface, tends to stall it and then it strikes the tail and rights the machine. The faster a machine flies the less is the lag in the righting couple.

However, I must say no more now. I shall answer Sperrv more fully in a later issue of AERONAUTICS when I have finished some experiments with a large machine which I am testing.

—A. A. Merrill.



the petition of captain w. i. chambers

This petition is a glaring example of injustice, by which one of the most progressive officers of tliC' Navy, while yet in the prime of life, was made a victim of the pernicious "plucking" system.

It is the case of an officer whose career of over forty years of honorable and distinguished service has been absolutely without a blemish; of an officer who has served faithfully, zealously, in all quarters of the world, with his chief interest centered in giving the best there was in him to his country, even in his leisure moments when off duty.

lie lias served on board eighteen ships of various types, commanded successfully six ships, including a first-class modern battleship, and has even had a squadron of six vessels under him during an important epoch. He has gone through all the hazards and tests of this long service without a reprimand or a punishment, and with nothing less than praise for his ability. Fearless in hs devotion to duty, never shirking either hard work or responsibility, he has accomplished much for the Navy outside of his routine duties. Such a man the Navy system should protect from sacrificing to the utmost his personal interests to the faithful discharge of more than duty.

While in command of the battleship Louisiana, and after winning the official commendation of the Navy Department for efficiency, he was specially selected for new and important duty on shore, for the reason that he was considered the best equipped of all officers for that duty, being detached from sea duty at this time against his wishes, and that this enabled the new administration, through this new ruling, to jeopardize his chances for promotion to a rear admiralship.

He was picked to start the development of air craft for naval purposes. In this he was absolutely alone, without even a clerk-to assist, in his struggle against

skepticism on one hand and the extravagant demands of the enthusiasts on the other, and he met with such distinguished success, against tremendous odds, in this new and technical work as to place our Navy ahead of all other navies in the practical development of air craft, and at least expense, in a short space of time. And while absorbed in these exacting duties he was apparently expected to personally provide a relief in order that he might go to sea again, to satisfy a recent ruling of the Navy Department concerning sea service—a ruling that has never been published to the service or embodied in Navy Regulations.

It is, of course, possible for_ the Navy Department, as a military organization, to order its officers to any duty, and in times past, as is shown by this petition, it was customary for the Department to issue preparatory sea orders a month or so in advance to officers on shore duty.

Throughout his exceptionally busy and arduous duty on shore in connection with aviation. Captain Chambers always kept himself in readiness for a sudden call to any duty. Notwithstanding his absorption in the details of a difficult duty, he had even exerted himself to familiarize a relief with those details, in order that_ he might turn over the responsibility to another and be free to obtain more sea service before promotion.

He was suddenly confronted with the information that he was expected to apply for sea duty to avoid being "plucked." And here is where the sterling qualities of this officer are shown, to his immortal credit. If he had applied for sea duty he would have escaped the "plucking." But he was hard at work on a difficult and important problem. His responsibilities were great, for human life was at stake. Should he apply for sea duty, abandon his work in confusion, acknowledge thereby that it was of

no importance, and place himself i the categoiy of a shirk who ha been holding down a shore bilh for the sake of avoiding sea dutj

In the consciousness of the ir portance of his duty to the servic he felt that it would be coward. to subordinate his personal interes to the faithful discharge of th duty. He, therefore, informed Ll Department by letter that he w; ready for sea duty, and pointed o-the importance of being providt with a relief whom he could f miliarize with the details of tl work in hand before his detachmen This he considered for the bel interests of the service, and 1 boldly declared that if the Depai ment were embarrassed in findii a relief or found it expedient delay his orders_ to sea, he w.-willing to risk his chances of pr motion. He faced the risk of mis ing the goal of his life's ambitic when it was within his power grasp it in such an easy manner.

What an example of pluck ai self-sacrifice to a high sense ՠduty!

The Department did not provic the relief; it did not order him sea, and after he was plucked promptly requested him to continil on this duty at the pay of a '■' tenant, as required by law fo tired officers on active duty, to his principles, he consent continue the duty until a could be provided. He has ,^ tinued on this duty for over se^f months, and now that a relief been provided the Departn. wishes to retain his services si further.

Senate Bill 4623 has been intr duced for the purpose of enablii Congress to rectify this injustic and to enable Captain Chambers continue this duty efficiently with dignity.

Every soul in aeronautics bono and appreciates Captain Chamber and earnestly hopes that Congre will heed the petition presented it to restore him to the active lis


Provided every manufacturer of aeronautical material in this country had the names and addresses of people known to be actively interested in flying in all the countries of the world, and cost of printing and mailing extensive booklets and circulars need not 1 -considered, how much good would that work do?

AERONAUTICS goes to bona fide subscribers—civilians, army and navy heads and officers and flyers, governmental branches, air-

craft factories and libraries—in this countr Alaska, Canada, British Columbia, Italy, Am tria, France, England, Japan, Russia, Alexia Argentine, Brazil, Greece, British West Indie Scotland, Java, New Zealand, India, Sout Africa, Azores, Central America and almo; unheard of countries. The descriptions of a], paratus given are unbiased, and are certainl worth a thousand times more as a silent sale: man than a manufacturer's catalog.

An inflammable dart for use by aeroplanes has been tested at Buc in the presence of military air experts with satisfactory results. The dart carries a small reservoir containing gasoline, which explodes on con-

tact. Its purpose is to set fire to dirigible halloor or buildings.

Three of the darts were dropped from an aer< plane at an altitude of 600 feet and found their marl



Attention has been attracted to e Paul Schmitt variable angle of |cidence machine through the mak-g of new world altitude records, r Garaix, with 3, 4, 5 and 6 pas-ngers. The application of the inciple of varying the angle of cidence to suit conditions or in-nation is shown to have been snc-ssfnlly accomplished. It permits ie following of a horizontal tra-ctory ascending and descending, ith a horizontal position of the selage, with maximum efficiency the weight carried and the power insumed.

Particularly effective in this marine is the 3-point method of sus-insion holding the sustaining sur-

ces. It took four years of con-

'entious thought and experiment arrive at this degree of success.

The fuselage is suspended by two A" frames from cross members ■'tween the front and rear struts the central section. At the bot-in of the fuselage a long screw id nut alters the relationship be-

een the fuselage and the wings, chain from the operating handle

ns over a sprocket at the end of

b long screw.

The fuselage is constructed en-ely of steel tubing autogenously :ld'ed. The cross section is quad-ingular just at the rear of the l iator's compartment, converging I Tin there to a triangular shape i|ar the rear: or, from rectangu-I", trapezodial to triangular. At Kch extremity of tlie small planes u elastic skid to reduce the of a bad landing. At the of the main planes are mov-lilerons of large dimensions, ng lateral stability. The ele-

vator is mounted at the extreme rear of the fuselage, and satisfactorily performs its functions in conjunction with the changes in the angle of incidence. The rudder, in two parts, is arranged along the medial line of the fuselage. The landing chassis, very strong, carries two reinforced skids upon which stands the fuselage, supported by six strong posts cross-braced, and four wheels on the same axis, each pair separated by a skid.

The power plant is a 160 h.p. Gnome motor and direct-connected propeller.

Upper planes spread, 57.40 ft.; lower, 41 ft.; total surface, 486 sq. ft.; length over all. 32.8 ft.; weight, 1.430 lbs. empty; carrying 990 lbs. of passengers, fuel and' oil for four hours the total weight would be 2.420 lbs.; speed, 65 m.p.h.

It requires nearly 300 ft. to get off in. and can start in an inclosure with walls 7 ft. high with a run of 393 ft.

The maker claims a speed range of from 43.4 to 74.4 m.p.h.


The photograph shows the self-starter on the 220 Anzani equipment of the Burgess flying boat delivered to R. J. Collier. This self-starter develops 15 h.p. and weighs with the battery 125 pounds. With it the operator starts the motor by simply pressing a button, which closes the circuit and the electric motor revolves. .After it has reached its high speed the clutch throws in the pulley connected to the chain drive and the main shaft of the Anzani motor.

This is the first installation of a self-starter of this kind in an aeronautical equipment. It is interesting to know that with the propellers the power plant complete weigu 1.01S pounds.

The propellers are of the Burgess double two-bladed variety, v\ith a special Burgess hub.

The Hartford starter (Hartford Suspension Co., Jersey City, N. J.) installed on the Collier flying boat is of the free motor type, which means briefly that the electric motor with its flywheel runs freely for a few seconds, allowing an immense amount of power, which is stored during that period through the medium of the flywheel, to be applied instantaneously to the engine, thereby carrying the pistons through the points of compression much more rapidly than if the load was encountered directly. This feature is of considerable moment with reference to the electrical starting of aeroplanes or flying boats, and no doubt it is distinctly obvious to aeroplane designers, who are constantly endeavoring to obtain for their respective designs the greatest possible power per pound weight, since they are perfectly familiar with the speed factor and its value where pounds per horsepower is the paramount consideration. With this fact in mind the starter was designed, and it is stated that the Hartford starter is the most powerful starter in the world, considering it on terms, horsepower per lb.

This starter is especially efficient don, patented a device (No. 14,180) then the air vessel would travel a

in starting a cold engine, since its of this character. The instrument distance of SOO ft. during the time

normal power may he increased is composed of adjustable scales which it took the image of an ob-

niany times by allowing the electric and optical apparatus, and designed ject to travel the length "r s" on

motor to run free for a few seconds for determining the ■ >-զquot;զlaquo;♦ ^ i;„„„ „„ „„„„„ >> t,„

until the momentum of the flywheel which a shell should

has reached its maximum; then all from an air

of this stored energy is added to strike a give.

the normal power of the motor and speed measuring part is here de-is applied instantly to the engine, scribed.

and by this method the engine may . . , , ,

be started even after being out of A" elevation and plan of the spet.ds.

service for extremely long periods. scaled instrument _ are illustrated in T

However, after the engine is warm, I- oTll-e °PUڜ device, shown fof t,

an almost direct application of the 111 ImS- -?. 1S Psed 111 .Judging t.he may I

moment at the lines or screen "p." IIy means* be released of this instrument and stop watch, essel in order to a ready means is provided, it is given object. Only the claimed, for ascertaining the speed.

If the object observed were alsoJ moving, the observed speed would' be the difference or sum of the two

avoid calculations unsuitable, circumstances, the speed

starter may be made.

- ~ - .. may he graphically determined by speed. Figs. 3, 4 and 5 are dia- the instrurnent illustrated m Fig. 1..


grams referred to below. 1 he an- ;t is vided with the ai,fa f paratus (Fig. 2) which is employed scaks of velocit -v> d .fa d for determining the speed consists the t5c , f , ; ,

of a camera or similar optical pro- and .u» These m be colored „., c jecV"g aI'I»frat"s carried by the air dilrel.entl as a he,D {0 ea read.

Since Riley E. Scott showed how craft, so that the line of sight is ; The sca]es »a» and «b»

to measure speed over the ground perpendicular to the line of flight. arg- adjusta);le with ard t tJ from a flying aeroplane, in the aim- 1-or convenience in operation, the vertjca] sca]es "c" a!1d "d " Thev ing of bombs, several devices have casing is divided into two parts sHde "and c]amp on the 'rod "f,'' been brought out abroad to accom- containing the lenses . o p. The whidl ig fixeJ he vertica, , phsh the same result M Per helot mirror q is fixed m the lower of heiht „ Tfa { ...

is one who has produced a device portion of the casing to deflect the j nivolallv mounted on the seal, which permits calculation of speed rays in the proper direction to be .?c "a res" for the nointer is by measuring, the distance passed received by the eye of the operator. fo'med . h j d ^ ;

over, the height of the machine A prism would be equally convent- w]lich ; adjustable in the s ace be. being known ent for this purpose. When the the velocity bars "a*' anc

Using Scott's simple method, all apparatus is moved m a direction ..^ „ Thg t scales <պ» d .... that is needed is a telescope, stop towards an object, the image travels indicate respectively angles aiu

speeds. The observed time taker by the image of an object upon the earth to traverse the screen fron "r" to "s" is noted, and the sliding piece "h" is brought opposite to this observed time upon the scale "a.' the graduations of which indicati time in seconds. The velocity ba: has previously been set to th. height on the scale "c." Tin barometer is consulted for height On bringing the pointer "g" to it: position of rest within the sliding hook "h" the speed of the craft I recorded upon the inner scale "',* tiie. graduations of which judical, miles per hour.

Fig. I







In a letter to AERONAUTICS, Stanley V. Beach discusses the re cent fatal accidents in our Arm; and abroad. "Had he (Murray' worn a Stevens safety pack," In says, "his life would have beei saved. Lieut. Murray stayed in llil machine and was plunged in the At lantic, his regular life preserve failing to save him from death b\ drowning after he had survived th< shock of the plunge. Had he world ?.n 'air' life preserver he could havel jumped out of his machine anil descended safely to the sea below] whereupon his cork jacket wouh keep him afloat till rescued. Tht safety pack, which is worn like knapsack, weighs but 4^ pounds-much less than the regulation lif< preserver; yet it will surely oper and check the fall if this is throug' a distance of 100 feet.

"Now that a flying boat is con sidered to be a motor boat, and must carry all the latter's paraphci

watch and accurate barometer. The in the same direction as the object «* >a. y a mean^ compel the a u

height is known. The telescope is itself appears to travel. The lens ma n rl >>^en"ers to wear a,lit.

set at an angle of 45 degrees. As "p" is preferably provided with 1 «ei u s .All aei opla iKs.hJoon

some prominent object lines up with fiducial lines, "r s" determining the <» dl"SS sat° l „ |, *T0PPe\\

the cross-hairs of the telescope the limits of the field. The distance *« Sllden°o tha? Dassenecrs as wf

watch is started. A straight course between the lines "r" an. "s" is a.ou id so_ that passengcrs as we

is flown. The telescope next is set adjuste d m relation to the focal as plot on 1 be protected m casj

at vertical. As the object again lengt Is of 'e 'em.es .so that e ,,c.n.,tco0r explode. IIad the men o,

comes under the cross-hairs 'the actual distance traveled over watch is stopped. If the height be ground by an air vessel at a par-

1,000 ft., we now know the machine ticular height is represented by ilie lias traveled a horizontal distance virtual distance "r s," and i of exactly 1,000 ft., and we know known factor of the height, the ti. set of In

e ill-fated Zeppelin L-II worn 'air fc preservers most of them wouh : alive to-day. The Secretary o If Commerce, and Congress, shouh

S'lt tor A'calculaTion or a (he focal Kh is .double ti e eng.h -sa hill requiring al, ancraft ,; of tables tells the sped. between the lines "r s" and the air h^e ٦raquo;\ totm of app.oved saia.

n 1911 one A. S. Marks, of Lon- vessel is at a height of 1,000 ft., parachute.


The adjoining illustration shows a urious machine which is said to lave been ordered by the War De-jartment of France, and surround-ng whose tests by army officers there s much secrecy. From what can je learned, first trials have proven atisfactory.

The machine is intended to ascend or descend straight, stand or advance at will in the air, and come lown slowly when the motor stops, irtie model in Nature is the winged bycamore seed, which descends to he ground very slowly, turning as it £oes. Substituting for that of grav-ty an internal force which will rotate the leaf and keep it at a positive angle, it is argued it would ■ise.

The machine designed by A. Papin and D. Rouilly is a propeller with jut one great hollow blade, A. In >lace of another blade is a housing, CC, containing a motor, whose plane }f rotation is parallel to that of the nachine, all carefully balanced. To rhe engine are attached hlades which jroduce an air current, which travels .hrough the inside of the wing and ->ut of its extremity through an oval orifice, G, at the rear edge of the .ving. The speed of the air through ts channel is said to he 200 meters >i second, and produces a reaction ►igainst the surrounding air, which »jives the wing a forward rotary motion. This, combined with a proper angle of incidence, gives the apparatus ascensional power. The end ,of the wing is terminated by a "banderolle" floating freely in the 'stream.

The motor, M, is cooled by the blast of air entering through the ֶentilator on its way to the wing.

A circular hull is provided, in which romnressed air is used as a shock absorber, to form the landing gear, I, of this new craft, or to sup-

port it on water. The operator stands in the circular central car, J, which is mounted on balls and wheels, and prevented from turning by an escape of air through the tube, K, which can be regulated at the will of the aviator. This same tube is used to steer the device up, down or sideways.

The main structure is of wood

and weighs 380 kg., motor included. The gyroscopic effect of the machine is made use of in maintaining the machine at a positive angle when turning at normal speed. The angle of incidence becomes zero or even negative when the motor stops. The "length" is given as 14 meters. The machine is entered for the great French safety prize.


The new second "aerobus" Sykor- 7.700 lbs. empty, or 10,560 lbs. with sky certainly holds the world's rec- 16 aboard. Using the Argus 100-ord for passengers carried at one h.p. motors, the weight per horse-time. On Feb. 25, at St. Peters- power, 26.4 lbs., and 5.3 lbs. per burg, he carried 16 passengers for square foot.

18 minutes, the useful weight ag- Xhe ,i;stjnctive feature is the fuse-gregating about 2.860 lbs. Later he la„6) 5.24 ft. wide in front, 1.96 ft. carried nine inclusive for 2 hrs., 6 wide in rear anj 59 high In front mins., at 1,000 metres height—the is pj]ot-s compartment of 10.75 s-i-record of the world for height and ft _ next a passenger saloon of 10.75 duration with nine on hoard. sq fL< a cabin 0f 3.22 sq. ft., the

Technical details: T.iplane, spread, whole lighted on each side by four 121 ft.; length, 65.6 ft.; surface, windows and three portholes, elec-1,956.5 sq. ft.; planes form a vein- trically lighted, and heated by the cal "V"; gap, 9.18 ft.; chord, 9.18 motor exhaust.

ft.; 3 vertical rudders of 53.75 sq The x j uged hag been

ft.; horizontal tail of which one-half (he four A motors bm Uvo 200 forms the elevator; weight about Salmson engines are to be tried.

The four engines are placed in pairs 011 each side of the fuselage, connected for onpratiou either separately or ensemble. The front motors drive one propeller; the two in the rear drive another. Thev are all started with compressed air.

The Russian Navy has ordered four midlines of this type. The illustration shows the inside of the passenger saloon.



A recent circular sent by the French Minister of War to automobile makers asks them to consider the development of aeronautical motors, for military purposes, especially of the fixed type.

Capt. Thomas S. Baldwin leaves for lvurope in a few days to lock o\cr the dirigible crop in the interests of the newly-formed Connecticut Aircraft Company (lately Connecticut Aeroplane Company), of Xt \v Haven, with which company he has signed a two-year contract. A small dirigible, about 5-nian size, will shortly be fmNhed. This will he 111 the so-called "vedette" class, lately siK-cified in the Navy's appropriation 1 ivont. The company is capitalized at $500,000. and has behind it representative business men of New Haven. Aeroplanes will also be produced.



The A. L. A. M. assumed that all motor car engines will deliver or should deliver their rated power at a piston speed of 1,000 feet per minute; that the mean effective pressure in such engine cylinders will average 90 pounds per square inch, and that the mechanical efficiency will average 75 per cent.

Substituting these values in the above B. H. P. equation, and substituting for A its equivalent, .7854 D2, the equation reads:

90y.7S54 D=X l,OOOXN,V-75

P.. II. P. =---—


and combining the numerical values it reduces to:


B. II. P. =---2.489

or. in round numbers, with a denominator 2.5.

(All Dimensions in Inches)

D= Distance between centers.

A = Distance between limits of contact.

R = Pitch radius of large sprocket.

r= Pitch radius of small sprocket. A' = Number of teeth on large sprocket.

n = Number of teeth on small sprocket.

P = Pitch of chain and sprockets. (Distance from center

to center of chain pins). 180° + 2a = Angle of contact—large sprocket. 180°—2a = Angle of contact—small sprocket.


Sin a -

A =D cos a

Length of chain =L

(90 +a) NP (90—a) nP L--+-+ 2A




Four-Stroke Cycle Engines. Authority Formula.


A. L. A. M. and Royal Auto Club____- = H.P.


Brit. Inst, of Auto. En. 0.45 (]"> + L) (D—1.18) = II.P-


K. P. Roberts.

- H.P.

]) —Diam. of cylinder in inches. L —Length of stroke in inches. R_Rev. per min. of crankshaft. N —Number of cylinders.


Derivation of the A. L. A. M. Horsepower Formula.

The indicated horsepower of a single-cylinder fourcycle engine is equal to one-quarter times the mean effective pressure P, acting throughout the working stroke, times the area of the piston A, in square inches, times the piston speed S divided by 33,000, thus:


i. ii. p. = y----33.000

Multiplying this by the number of cylinders N gives (he I. H. P. for an engine of the given number of cylinders, and further multiplying by the mechanical efficiency of the engine E gives the brake horsepower. Therefore the complete equation for B. II. P. reads: P A S N E

B. II. P. - -



In using table, find bore ot cylinder in inches or

millimeters in the proper left-hand column, then read

across to right under column for the number of cylinders that the motor under consideration has.

Bore — 1) Number of Cylinders = N.

Inches. Millimeters. 4 6 8

2Vz 64 ........ 10.00 15.00 20.00

Zy% 68 ........ 11.23 16.85 22.05

2H 70 ........ 12.08 18.13 24.20

2Ys 73 ........ 13.37 20.00 26.45

3 76 ........ 14.40 21.60 28.80

iVs 79 ........ 15.64 23.50 31.25

3 % 83 ........ 16.92 25.39 33.80

3fg 85 ........ 18.21 27.30 36.45

3y 89 ........ 19.61 29.45 39.20

3H 92 ........ 21.08 31.57 42.05

3V4 95 ........ 22.50 33.75 45.00

1% 99 ........ 24.22 36.32 48.05

4 102 ........ 25.60 38.40 51.20

4% 105 ........ 27.20 40.80 54.45

4'4 108 ........ 29.00 43.50 57.80

4 3/8 111 ........ 30.65 46.00 61.25

A'/i 114 ........ 32.40 48.60 64.80

45^ lis ........ 34.28 51.41 68.45

AH 121 ........ 36.15 54.20 72.00

4 7/s 124 ........ 38.25 57.21 76.0!

5 127 ........ 40.00 60.00 80.00

5's 130 ........ 42.20 63.20 84.05

sVi 133 ........ 44.20 66.40 88.20

5."x 137 ........ 46.34 69.50 92.45

$y> 140 ........ 48.48 72.72 96.80

53-s 143 ........ 50.80 76.10 101.25

SM 146 ........ 53.00 79.50 105.80

5% 149 ........ 55.28 82.88 110.45

6 152 ........ 57.70 86.64 1 15.20


The names and address of the members of the U. S. Aviation Reserve, organized recently by Albert Bond I ambert, have been filed with the War Department. Most of the members are aeroplane pilots, while some are balloon and dirigible men.

It might be suggested that arrangements he made with the Chief Signal Officer for using tbe members of this Reserve during maneuvers and in connec'ion with other experiments conducted from time to time in which the Army aviators are employed, bare expenses to be stood by the Government. This would give the civilian flyers such instruction and practice as would fit them for efficient service in time of war. Without such practice, civilian aviators have been shown to be of little value. The same might he done with the Navy. Memhers of this organization should take up this work in the spirit of patriotism and devote a certain portion of their time along this line, just as National Guard men do each year.

Aviation is a good deal of a failure.—Galveston News.

So are ice cream parlors 011 the fringes of Hades.


The Hay bill (II. R. 5304) may not be reached at this session of Congress, owing to the disturbed political condition. When called up two weeks ago it was put back in storage.

This bill provides: for (1) an aviation section as a part of the Signal Corps, charged with the operation of all military aircraft, aeronautical appliances and the duty of training officers and enlisted men in aeronautical matters; (2) for, in addition to such officers and enlisted men assigned from the Signal Corps at large for duty in such section, not more than 60 aviation officers land 260 aviation enlisted men, the latter officers to serve for four years: (3) that there shall be constantly attached to the aviation section a sufficient number of aviation students to make, with the officers actually detailed in such section, a total of 60 aviation officers and students constantly under assignment to said section, the aviation students to be unmarried lieutenants under 30 years, who shall remain attached to aviation not to exceed one vear, to determine their fitness for detail as aviation officers in the section, no person to be assigned

against his will; (4) that aviation officers be classed "junior military aviators" and "military aviators"; (5) that each aviation student, while participating regularly in flights receive 25% increase in pay of his grade; (6) that each junior military aviator shall have rank and pay one grade higher than that held by him under his line commission, and an increase of 50% in pay of his grade while regularly flying: (7) that each military aviator be likewise raised allowed 75% increase, the number with this title not to exceed 15; (8) aviation enlisted men include signal electricians, sergeants, cooks and privates, of which not more than 40 at a time may be rated as "aviation mechanician," the mechanicians while engaged in flying to have an increase of 50%; (9) junior military aviators, military aviators and aviation mechanicians must obtain certificate from examination board: (10) junior military aviators must serve as aviation student for certain period; (11) to become military aviator, at leas* tVee vars must be served as junior military aviator: (12) that the widow of any officer or enlisted man who shall die as the result of an aviation accident shall receive a year's pay.


Imports of 'Planes and Parts: January, $5,673; for 7 months ending lanuarv, $26,233; same period. 1913, $51,796.

Exports of Domestic "Planes and Parts: January, $15,114: for 7 months ending January, $69,119; for same period, 1913, $79,153.

Exports of Foreign 'Planes and Parts: January, none; for 7 months ending lanuary, $4,949; same period, 1913, $43,810.

In Warehouse: January 31, none; January 31, 1913, $19,516.



The Italian Aeroplane Company. t>07 Webster avenue, Pittsburg, Pa., announces that it is building a powerful aeroplane with wings of variable surface, loaded to 25-30 kg. p:r

isq. m. Two 200-h.p. motors will be used, driving three propellers. The engines can be run independently. The engineers are Severino Giuliano

'and Cesare Canovetti, who are said to be well-known men in Turin and Milan.


The first Wright flying boat has been delivered to the' U. S. Navy for use at the Pencacola aviation school. ___

$300,000 NOW FOR U. S.

Pleading before the Senate Cora-mi'tee. the Secretary of War succeeded in getting the $50,000 put back in the appropriation for aircraft, making it again $300,000.


In the national championship balloon race, starting from St. Louis July 4th, the prizes are as follows: First prize, $400; second $300; third, $200; fourth, $100.

Each contestant will be allowed $150 for expenses, provided the start is made.

Entries close May 1st. Check for $100 must be sent to the Aero Club of America, which will be returned if the start is made, except to the winner, who will be appointed on the international team for the race from Kansas City.

Gas, labor, sand, etc., \\\\\ be' furnished free to all contestants. The race will start from the motordrome. Grand stand and track completely surround the field, providing a shield 60 ft. high from the wind.

For further information address R. E. Nolker, president Aero Club of St. Louis, 15th and Tine streets.


The record of flights at S. C. Aviation School, San Diego, Cal., for the two weeks ending March 28. 1914, are as follows:

Total number of (lights, 60; total time in the air, 16 hrs., 47 mins.; passengers carried, 31. There are but five machines now in service in the Army.

Srm'nary, Jan. 1 to March 28: Total time in the air, 207 hrs.. 42 mins.; total number of flights, 800; passengers carried. 387.


Work has advanced rapidly but i|tiietlv on the new 16-cvlinder motor designed by W. Starling P>nrgc>s and built by the makers of the White automobile. Imagine two S-cylinder "V" motors pl-iced base to base, and you have it. This construction saves a great deal of weight. The head-on ppooarance names the new type the


Steady progress is being made in the construction of the Curtiss transatlantic flier ordered by Rodman Wanamaker, and in arranging the thousand and one other details that fiitfr into the problem. To one unfamiliar with the mysteries of aeroplane construction, however, the work as it stands carries no definite impression of what the finished machine will be like. There are big wings in one shop, the 200-h.p. Curtiss motor in another building, special forgings in the blacksmith shop, other metal parts in the tinsmith's shop; there is the skeleton of a 40ft. structure in the aeroplane room, and a big temporary pontoon in the boat shop. Only those who know the "game" realize that within forty-r-'eht hours after these various parts a-e finished the entire machine may be assembled ready for flight.

In other directions much work is being done. From England Lieut. Porte, pilot of the Wanamaker flier, h'is notified Glenn Curtiss of the dcvlopment of a scientific instrument which records the speed of a f ;ng machine in relatun to \hi earth. The same instrument also indicates the direction in which the machine is flying. If as accurate as claimed, Mr. Curtiss says this will prove an immense advantage to the pilot of the big flving hoat.

There is building at the Curtiss factory a new 160-h.p. flying boat. Th" new flving boat looms very large as compared with the standard four-passenger flying boat. The big fellow is arranged to carry six to eight passengers, and if it was 1 bought desirable to do so. two full-length berths could easily he arranger! in tHe after cockpit. This probably will develop into a stock model flving boat for use as a private cruiser or as a military transport. _.


Ml these stories of Peachcv and world race having obtained Wright license arc pure hunk, according to AInheus S. I Sanies, secretary of the Wright company, at 1 1 Pine street, Xcw York. Mr. Panics says that no one has been granted a license.

Your paper makes a man think — therefore, the questions. J. A. C, Pennsylvania.


Pomona, Cal., April 6.—Attaining an altitude of 14,200 feet, Glenn Martin broke McCauIey's American altitude record.

Berlin, March 31.— World 2-Man Height Record. — Linnekogel and passenger set the mark at 6,300 m. (20,b64 ft.). Rumpler monoplane.

Chartres, March 2S.— World 9-Man Height Record.—Garaix and 8 passengers made 1,550 m. (5,084 ft.) altitude with the Schmitt variable angle biplane.

Pitterfeld.—83 Hours in the Air. —The new balloon duration record of Hugo Kaulen has been officially confirmed. With two companions in a hydrogen balloon, he traveled 2,827.9 kilometers, starting from Pitterfeld, Germany, on Dec. 13 last, to near Schnabnitzy, Siberia, up for 83 hours. The old duration record was 73 hours 47 minutes. On March 7, 1914, Berliner made 2,977 kils., which is the record of distance.

Robert Thelen, who made an altitude record with three passengers on March 20 at Johannisthal, used a Mercedes motor in his Albatros biplane, which was fitted with a Bosch magneto, a Bosch starting apparatus and Bosch plugs.


Hamilton dsport has discovered a new sport, claimed to be even more fascinating than the standard flying boat. The new game is snow boating, and it proved such fun that for the first time in the history of local aviation the fliers are sorry to see the snow fast disappearing.

The discovery that a flying boat or standard type of hydroaeroplane would handle as well on snowbanks as on the water was almost accidental. Some experimental flights had been planned during February, but when the machines were ready, a cold snap had set in. Lake keuka was frozen solid, and soft snow lay over the ice to a depth of nearly 2 feet. It was evident weeks must elapse before open water would again be seen, so Curtiss thought to tit the machines with broad runners or skiis. Before trying these, he tried running the machine in Ihe snow, and found to his surprise thai the pontoon of the hydroaeroplane worked to the surface of the snow just as a hydroplane at speed drives up out of water. After that simple demonstration, the rest was easy.

Sliding at 30 to 50 miles an hour over the snow proved as exhilarating as sliding over the water; perhaps more so, for the inequalities of the snow surface were less than those of the water; there was no splash or thump of waves, no shower of wet spray; there was complete silence except for the exhaust of the motor, the swish of an occasional flurry of snow disturbed bv the boat and driven by the whirling propeller.

At intervals during the past two months snow boating has been indulged in. William S. Lnckey, winner of last fall's aeroplane race around Manhattan, found that the machine would plane or glide over the surface with considerable weight aboard, and on several occasions he carried two, three and even four passengers, bestowed about the craft. Next winter it is probable considerable attention will be paid

to the development of snow fliers, because of the avowed intention of Amundsen and other polar explorers to try aerial locomotion in the arctic regions.

Messrs. White & Thompson, of Bognor, England, are building a large Curtiss flying boat for the race around Great Britain, for which Lord Northcliffe has offered a special prize of $25,000. Two attempts were made last fall to accomplish the flight in standard English water flying machines, but both trials resulted in failure. White & Thompson decided to make the attempt in an American type of flying boat, but as the rules provided the machines entered must be built entirely in England, they secured from Glenn II. Curtiss complete plans for the motor and flying boat, both now nearly completed.


There has been organized the new Sloane-Daniel Company, which has leased a large factory at Bound Brook, N. J., for the purpose of manufacturing all types of gas engines, both for aeroplane and marine use.

The Sloane Aeroplane Company is now manufacturing aeroplanes on a larger scale, building the new Sloane monoplanes, biplanes and flying boats.

The new motor company has moved into its new quarters and has installed a complete equipment of up-to-date machinery. An order has been received for a special lightweight 400-h.p. marine engine for a 300-ft. cruising yacht now building for Alexander S. Cochran.

Most of the motor machinery located at the Sloane aeroplane plant in Long Island City has been shipped to the new factory, and the additional space thus provided is already being used for the building of flying boats. From now on the whole Long Island City plant will he used exclusively for the manufacture of aeroplanes. There is enough space to facilitate quick work in the building and erection of several machines at a time.

The motors will be constructed under patents issued to Mr. I'inl Panic), who is now associated with Mr. Sloane, and will be built in both the rotary and stationary types. A new rotary type motor has been designed expressly for the Sloane monoplane, and is very compact and light. Both types, however, are equally good on flying boats and biplanes, and will range in nower from 80 h.p. to 200 h.p., and pos-sihlv in the near future as high as 300 h.p.

The first 80-h.p. rotary motor, which weighs only 160 lbs..'has been completed and successfully tested. It is of unique design, very simple and efficient. Tt is of the 2-cycle, 6-cvlinder type.

In the aeroplane factory, the first of the new types of flying boats is now nearing completion, and trials will take place around New York in th" near future.

In addition to the flying boat, there is the novel machine of Israel I udlnw's now nearing completion at the factory, a new monoplane, and a special experimental type monoplane receiving its finishing touchps. Tentative orders are on hand for several irnw flving boats and for a «pcc<al inherent stability machine to he built to the order of a well-known New Yorker.


With the completion of the first of the series of the new Sloane flying boats, the Sloane Aeroplane Company will open at Larchmont, N. Y., the first flying boat school to be established in the vicinity of New York, which will probably be about May 1.

John Guy Gilpatric, the Sloane chief pilot, will be in charge, and instruction will be by dual control, the pupil sitting alongside the pilot and quickly learning the correct method of operation without any danger.

In addition, a land school will he; operated, instruction being given on monoplanes and biplanes.

The Cleveland (Ohio) Aero Development Company has been incorporated for manufacturing and dealing in airships; capital, $50,000; F. E. Shattuck, Karl F. Wetzig, C. P. Shattuck, Tohn C. Murphy and E. E. Shattuck.

Callicotte Airship Company, North Yakima; capital, $300,000; incorporators: A. A. Callicotte, J. L. Callicotte, E. G. Peck and others.

'PLANE FALLS—$3,000.

Mrs. Irene Morrison, alleged to be injured by an aeroplane driven by Arch Hoxey, Sept. 16, 1910, at the State Fair at Milwaukee, was awarded $3,000.

The plaintiff in a suit for $10,000 against the members of the State Board of A31 lculture at that time, alleged that while standing in part of the grandstand, watching the aviator's flight, the machine swooped down upon her and injured her back and neck severely. The suit was brought against the members of the Board of Agriculture.

A suit for $50,000 was, prior to this, brought against the Wright Company, but the plaintiff lost, as she failed to show that the accident happened by reason of any negligence on the part of the aviator or the Wright Company. This is ihe first damages obtained in this country in a suit relating to an aeroplane exhibition which resulted i.i an injury to a spectator.


The Goodyear Aero Club is about to open its second season with a large and enthusiastic bunch on the waiting list for balloon trips. It is planned to make a pleasure trip almost every week throughout the spring and summer, and in addition to this, plans are under way for experiments in wireless telegraphy and motion picture photography.

At least one new pilot will be trained in the near future. Ralph II. Upson has definitely accepted the invitation offered to defend the Gor-don-Pennett Cup next fall anil will probably use the balloon "Goodyear" again, which is practically in as good shape as it was when it was built.

The plans of the club in regard to the National Race, July 4, from St. Louis, are not absolutely settled. This contest is an elimination race for the selection of the third member of the American team.

Published semi-monthly in the best interests of Aeronautics


AERONAUTICS PRESS INC. 250 West 54th Street New York Telephone, Columbus 8721 Cable, Aeronautics, New York


Editor Technical Editor Model Editor Advertising

Entered as Second Class Mail Matter, September 22, 1908, under the Act of March 3, 1879. $3.00 a year, 15 cents a Copy.

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Make all checks and money orders free of exchange and payable to AERONAUTICS PRESS.

Subscribers will kindly notify this office if discontinuance is desired at the end of their subscription period, otherwise it will be assumed that their subscription is to be continued.

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H. C. BROWN, Machinist 54 PARK AVENUE -:- BROOKLYN, N. Y.







■ Made in all sizes from $6.00 to S15.00 per 100


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Mention Aeronautics

Special grades of Bamboo for Aeronautic Work. Reed, Rattan and Split Bamboo for models. Tonka Rattan for Skids lJ4 diameter and under any length.

J. DELT0UR, Inc. ٥llt'ړ{'


All Makes Repaired, Sold and Exchanged

Mail orders yiren special attention

Hecht's Magneto Exchange

230 West 49th Street - New York

Member of The Aeronautical Society

Longren and his HALL-SCOTT powered tractor

The Young Aviation Co., Topeka, Kansas have written

"We have used No. 51 three seasons, has done elegant work all this time, no motor failure, and have filled more dates than any other aviator in the state of Kansas and most of Oklahoma ami Nehraska.

Siynecl A. K. LONGRKX."

Investigate our 100 H. P. equipment

Hall-Scott Motors Cuaranlee Success

Hall-Scott Motor Car Co.

818 Crocker BIdg. San Francisco, Cal.


OPENS. The Gyro Motor Company, of AERO MART Washington, D. C, has recently de-

The annual April migration to veloped a new type of intake mech- FOR SALE — Two Curtiss-type

Ilammondsport has begun, accord- anism w-fiich will largely eliminate aeroplanes, one with Roberts motor,

ing to L. J. Seely, the famous bald all possibilities of motor troubles, $1,400. George E. Yager, 119 N.

of the trusty typewriter. Chirping, and thereby render the motor ser- 15th St., Omaha, Neb._

Deckwith Havens breezed in from viceable for long flights. Incident-Cuba with adventurous tales of wild ally it will reduce the amount of oil MODEL AERO QUARTERLY-

ducks and fish. Not far behind him "eeded- a"d b!ock testsf bave show" ^s ^'ce a year" (Sata 20

, , .> , , an apparent increase of power over oiners. id cents a year tL-aiiada. zu

was Elwood "Gink Doherty, also ^ m w)jid ag ev body cents) Wm Hewj't, 111 A E. Dur-

fresh from Cuba, Miami and other knows> was a,ready' considered a ham St.. Philadelphia, Pa.

resorts of the aerial plutocracy hi h, efficient power plant. ■

John Lansing Lallan, once featured '0t,1.r :mnortant advantages of the GREEN patent aeroplane for sale,

by "Pill" Pickens as "the duck from °tber mP01 ant advantages ot the or takg tner< nr make propositio„.

Dublin," sailed in from Pensacola. n1fw,.,"tak1e- *h,ch t * dobert Green' 261 XV' 1Sth St- Ncw

Raymund V. Morris is en route from the "Duplex, 'are that it is accom- York.

Petersburg with his mono-flying phsfhed by sliding action only and -

boat. Chas. C Witmer has started 1 iat *he m0t0\ ca"Tb,e "ad,,y 'J11"0'" MORANE-SAULNIER - Latest

v- .t r i c. i tied between about 1,300 r.p.m. down *vne cet nr detailed worU-ino- rlnټ/p>

North from Miami, and Stephenson , ., , 1 , ;ype. act ot aetaneu woikmg clraw-

MacGordon is tirina rauidlv of to 500 r-p-m" a"d that a"y Speed in«s for sale at $200- Sale exclu-

AlacOoidon is tiling rapidly ot ^ bg kept indefinite]y if desired. sive. Morane-Saulnier holds best

„a.٠ ^eacn. jjoctoi l rancis B kfiri ;s impossible in the new records cross-country and speed fly-

Wldman is preparing to leave San mechanisnli wllich would comme„d }"S- Owner of drawings can super-

Diego and will again take up his loop-the-loopers. The '"te»d ^^VtttiAddr

arduous duties as chief instructor intake \s „„ the outside care AERONAUTIC S. 250 \\ .

at the Hammondspor camp on Lake of ^ er anJ the ,atest rfe. 54th St., New \ork._

Keuka. 1 hose who have arrived to fc mechanisnl t0 be LOST-S,000 subscribers to some date seen, mild y surprised ano also *d. detached. aeronautical magazin-. Wagon broke well pleased that the geographical preparations are being made by down and a case of nuts was dislocation of Ilammondsport remains anv for increasing its out- tributed over the pavement. Not a unchanged, and it continues to be -n ^ tQ fflake ;cker de]iv. subscription agent was at hand

identified as the one town on the . L. II. C.

... . . . cries than in the past.---aviation map of America with a ring

around it. (Those planning to con- - . „II0:h-P- ^'OTOR for sale. Spec-duct races for flying boats during la"/ bu,lt; « cylinder V, A*A by 7, the coming season mav instruct their Frank Purnside and Fausto Rodri- cooled built by Christie Ma-printers to shin all' entry blanks guez, of the Thomas cohorts of ,' ,ne ^o. for t K Hamilton, piiiueia 10 snip .in tniiv uiaiiKs = զnbsp;Mown by him at Pelmont and Sac-here. If another prospective en- Path, V ^. have returned from a rament0/ Cost $ Perfect trant should be located later at pleasant and successful tour of rondjtj011i ready t0 put in 'p]ane. some other address, the file copy of South America. Can be seen any dav_ r>un ]10t

the entry blank can easily be re- _ more than 4 hours total in flight.

plevined.) Registrations for the $1,000 cash only. Address Hamilton,

Aoril 15 class are numerous as usual. We are working all the overtime c/o AERONAUTICS._

with prospects that the S. R. (). we can possibly get in to even try t^c-ki « *t /-

sign will be hung out as eariv as to keep up.—Kemp Machine Works. DRAFTSMAN—Can draw and

, . . զnbsp;trace. Equipped with instruments

lasl ---- and reference books. Two years

. , experience on milling machine, drill

._ V,"', ",ag",ne.h3S ,d?nc "ie 3,1 .'.-ess and erecting floor; also with

awful lot of good and I get more autQ enKjnes. Will accept positioll

out of it than from any other maga- ;n aeronautic line for living ev-

T7T v rr\n DTMrurc zine 1 hav° evcr seen.—M. A., penses until services prove worth/

r'L.Y-COP PINCHKS Pennsylvania. of more. K, c/o AERONAUTICS.


Guy Cilpalric formally opened BURGESS - DUNNE PROVIDES THOUGHT

the New York aviation season on FOR CRITICS April 14. when lie flew up Main

Street in this town and landed in Clifford L. Webster is continuing The Burgess flying boat, now in

Central Park, where a "cop" handed flights at Marblehead with the Bur- llse in the Navy with a weight total

him a summons The complaint will gess-built Dunne machine When of 2J02 ,bs _ "^j, 70/ Renault, de-

probahlv be disturbing the peace power is shut off tiie aeroplane as- , , . , ,

of the other hirds of the park. Gil- sumes a normal and verv flat gliding velo'led 53 m-p-11" and tl,e BurgCfS

patric had flown his 50 Gnome re- angle without touching the levers. t''act°r. gross 2,001 lbs., /0 Renault.

modeled and shortened Dep from In answer to the question regarding made 59 m.p.h. during test.

the Sloane school at Hempstead, directional control, Mr. Wehster Future machines of the Dunne

where he is chief instructor, to the claims he has all prizes "cinched" type wj]j be buj]t lighter The abil-

pa'k in ,25 "»"«t". w'tli a good, for landing at a certain marked j" of the mad]ine t0 contro] itself

stiff wind in his face. He could not spot. Ihe machine does not nose .... . .

return by the air route owing to into a wind as much as it had been leaves the pllot free t0 lake obser'

the argument with the cop. expected to, but no difficulty is ex- vations and do reconnoisance work

A representative of the Sloane perienced in keeping its direction at without the necessity of carrying a

Company stated that the flight had any angle desired with the wind. passenger.

been made in response to the urging Some figures have been noted Lieut. Milling spent April 6 and 7

of the Aero Club for some flying, down and are here published: The with the Burgess Company, during

Now Cilpatric stands in danger of net weight of machine is 1,529 lhs.; which time he saw Mr. Webster fly

being suspended for flying over the gasoline, oil and equipment, 191 lbs.; the Dunne, make a long glide with

city, which is against club rules, crew, 367 lbs.; total, 2,087 lhs. Ov r it, shutting the engine off while the

However, it is possible that the ex- a triangular course in an 8-mile machine was in flight, and with his

igencies of the occasion may dc- wind, with above weights, the speed hands over his heads and controls

mand the argument of oil giving average was 58-}4 m.p.h.. with the locked. Lieut. Milling also took a

out, after having been blown out Curtiss OX motor running 1,300 passenger flight with him and

of the intended course, or some r.p.m., developing at that speed seemed to be greatly interested in

other perfectly legitimate excuse. about 75 h.p. the new type.



Send sketch or model for FKKE search of Patent Office record. Write for our Guide Books and What to Invent with valuable List of Inventions Wanted sent Fiee. Send for our special list of prizes offered for Aeroplanes. $600, 000 Offered in Prizes for Airships. We are Experts in Aeronautics and have a special Aeronautical Department. Copies of Patents in Airships, 10 cents each.

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American and foreign patents secured promptly and with special regard to the complete legal protection of the invention. Handbook for inventors sent upon.request. ■*0 McGill Bid*. WASHINGTON, D. C.

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The Thomas School



Address, Thomas Bros. Aeroplane Co. BATH, N. Y.


We make an extra high grade plated finish wire for aviators' use.


John A. Roebling's Sons Co.









For ^port, exhibition or military use, over land or water now embody the improvements that have been suggested by the experiments quietly conducted during the past ten years.

The Wright Company

DAYTON, OHIO New York Office: 11 Pine St.

29 West 39th Street, New York

OFFICIAL BULLETIN. Next General Meeting.

Catalog File. S. A. E. Meeting.

A catalog file has been inaugu- The Society of Automobile Engi-

rated. In this will be found the neers extends to members of the

catalogs, data sheets and other Aeronauticai Society an invitation

printed matter of aeroplane, motor b . meeting at the

and accessories makers and dealers. , v... „. ° , .

Every manufacturer is requested Automobile Club 239 W. 54th

to keep this file complete with the street, New York, Thursday evening,

latest bulletins and pamphlets of his April 30.

goods. The general subject of the nieet-

»t ^ t-\ i- lnS will be "The Influence of Racing

Notice to Delinquents. 01f Automobile Design.» Ml, Finje*

Delinquents in payment of dues p. Porter, designer of the Mercer are earnestly requested to place car which won the Grand Prize ra

?aCrI?eSseVep8oselb£0tft "rder -11 present a critical review of the

The paper will be lllus-

— ~.''ine ,"n be that they may receive the official subject me paper win ue uius,

?vnBt,r i««ne?ted that bulletin, AERONAUTICS, semi- trated by lantern slides and motion fiorge Clifton will delive'r his post- ٦deg;nthly. the membership certificates pictures of the recent California


George _

poned lecture on "Aerial Photography" at this meeting. The evening will also be devoted to late developments in aeronautics as portrayed by lantern pictures of new aircraft and accessories, with a popular series of pictures of general aeronautic interest. The next scheduled meeting thereafter will be held on June 11.

New Members.

The following members have been elected: Victor M. Zucchino, 257 Summit avenue, West Hoboken. N. J.; C. \V. Buchanan, Monmouth, 111.; Orville Spreen, 300 New Commerce Bank Building, St. Louis, Mo.; George Rudolff, 365 \V. 56th street, New York City.

Data Sheets.

The new technical board, Messrs. Leon Goldmerstein, Ralph G. Guer-(iuin, Rudolph Ilanau, William J. Hammer, Earle Atkinson, have inaugurated the issuance of data sheets in convenient form for use with loose leaf books, similar in character to those issued by the Society of Automobile Engineers. These data sheets will be issued from time to time as fast as they can he prepared and furnished to members in good standing. They will contain

and data sheets.


Clarence I'. Wynne, President. Jos. A. Steinmetz, ist Vice-President. Wm. D. Harris, 2nd Vice-President. George S. Gassner, Secretary Laurence Maresch, Treasurer.


Arthur T. Atherholt. Harold II. Knerr. II. F. Bamberger. Wm. II. Sheahan.

Dr. Samuel C. Falls. Walter S. Wheeler.

Office of the Club, Bellevue-Stratford, Phila., Pa.

good standing. iney win contain d d f th c]ub was held in the Bellevue-Stratford, on

eventually all engineering data or Frjdav April 3 at 8 p m

engineering information relating to R (vood'house gave a talk on "The Meaning and Influences of the

aeronau ,cs such as calculation of Recent y Developments° in Aeronautics."

chains, lengths and sizes, steel tubing, tables, wire tables, strengths of woods, pressure tables, various statistics, conversion tahles, calculations for balloons, dirigible and para-


The Aero Science Club has been 29 W. 39th street, Saturday eve-sheets5' will V^Zt«Jyt2 of fTX^ftt art^and nin8S-

aeronautic engineering knowledge. «lA °thnefr8av ° :*°Stef the art a"d Members and their friends are in-Leather folders for these data sheets science of aviation, can be had at $2 each.

Membership Certificates.

Owing to the fact that the first -

twenty-five membership certificates subscription to AERONAUTICS,

are being auctioned at the meetings In each issue wl" be published the . -h;t fl.P(

of April 9 and May 14, delay has bulletin of the club and the most ' 1 l^%',c

, vited to exhibit apparatus and fly

Five persons in any one vicinity ae ,ane niode]s for izes at the

may organize a branch of the Aero £ Festival to be held under the

Science Club. Dues, $3 per year. * .« f h L e f I>oliticai

Each member will receive one year s EduPcatiorl) Civic F°rum and Eco-

Club. Admission, $1. _ Ex-ee. The exhibition will be Regiment Armory, 34th

been necessary in sending these out important essays The Greater New gtreet and F°urth ave„Ue, 'aftcr-

to members. >°r,k , branch of the Aero Science and evenings of Wednesday,

-r. t -l. Uub held ,ts first meeting at Grana Thursdav and Frjday Aoril 22, 23

Patent Library. Central Palace, April 11, and the a„dUr2S4day a"d ^rmay' APnl *—

All aeronautical patents issued in next bulletin will contain list of offi- "

the United States are on file in the cers, also club emblem. The Aero- For particulars address Edward

Society's office. These are available nautical Society has voted to co- Durant, Director, Room b27 World

at all 'times. Copies of any patents operate with the Aero Science Club, Building, or telephone Aeronautical

can be obtained through the Society and meetings will be held in their Society from 2 to 5 p. in., except

at 10 cents each. rooms at the Engineers' Building, Saturdays.



Use our Waterproof Liquid Glue, or No. 7 Hlack, White, or Yellow Soft Quality Glue for waterproofing the canvas covering of flying boats. It not only waterproofs and preserves the canvas but attaches it to the wood, and with a coat of paint once a year will last as long as the boat.

For use in combination with calico or canvas between veneer in diagonal planking, and tor waterproofing muslin for wing surfaces. Send for samples, circulars, directions for me, etc. L. W. FERDINAND & CO. 201 South Street, Boston, Mais., U. S. A.

4ER0NA UT1CS, April 15, 1914

Page in



The Benoist School of Aviation now open at St. Petersburg, Florida. The school is under the personal supervision of Tom W. Benoist and Tony Jannus.

We also conduct the first regular schedule passenger-carrying air line in the world, St. Petersburg to Tampa, Fla. Students who want to join the school and prospective agents who want their territory for the exclusive sale of our flying boats will do well to address

The Xew Benoist Flying Boat in Action


St. Louis, Missouri or St. Petersburg, Florida

50 H.P.



80 H.P.

207 pounds

Built of Nickel Steel and Vanadium Steel Throughout

Endurance Flying Record

to Date 4 hrs., 23min.

Send for Catalog

THE GYRO MOTOR COMPANY, 774 Girard Street, Washington, D. C.


Highest official Government Endorsement. Strongest Hubs of any

propeller of any number of blades. Main merits, Reduced Diameter and Faster Flight. Fast coming into use on all high-class machines used on all Navy Boats. Cost less per blade than two-bladed propellers.

PARAGON PROPELLERS are the only propellers ever officially commended and continuously purchased and used by the Government of the United States. This is not an accident, but a guarantee of merit. Talk to us for propeller facts, figures and service.

THE AMERICAN PROPELLER CO., 243-249 E. Hamburg St., Baltimore, Md.

Constructor*, as u;e// a* Aviators, are

MAXIMOTOR'S most ardent supporters.

90-100 H. P. MAXIMOTOR being successfully tested for brake horse-power, developing 110 actual brake horse-power, at 1300 revolutions. Weighing 370 pounds complete with Magneto, Carburetor and Propeller Coupling.

There will be a new 8-cylinder ''V" type 120 H. P. motor addition to the MAXIMOTOR family.



Watch for the developments

Catalog on request

Ash m u s e n Aeronautical Engines

now ready for the market

60 h. p. and 90 b. p., other sizes to order

Our 60 h.p. 8 cylinder engines have flown Wright's Twin-screw, Curtiss-type and Tractor Biplanes, and Bleriot-type Monoplane. 6 yrs. experimenting and testing on Aeronautical engines alone. We make nothing else.

Good discounts to first buyers in some localities, and on quantity contracts, and to agents.

Aueneies Open

Ashmusen Manufacturing Company


Kings Park, Long island - New York


the boland motor

8 cyl. "V'type 6o H.P. 240 pounds.



the boland tailless biplan1

equipped with the Roland Control (two movement and BOLAND MOTOR.

THE BOLAND CONTROL is the embodiment of utmost satety and simplicity in a new system of control which is bas>ic in principle. Write for particulars.

Factory: Ft. Center St., Newark, N. J. I

Office: 1821 BROADWAY, new YORK.


Built in capacities and types for standard and special aviation motors

write for prices on standard makes. send your specifications for special designs


64th St. & West End Ave., New York City

Also Manufacturers of Automobile Radiators cf all types