Wright Model E" Aero Engine-8 cylinder V type; 180 h.p. Wright Model "H" Aero Engine -8 cylinder V type; 300 h.p. INTER-ALLIED AIRCRAFT CORPORATION. Distributors of Avro airplanes Model 40-4K

Model 50-4K equipped with LeRhone rotary air-cooled, 110 h.p. motor. AMERICAN AIRCRAFT AND SUPPLY WORKS OF CHICAGO.

Single seater sport plane.

GOODYEAR TIRE & RUBBER COMPANY.

Goodyear Pony Blimp.

UNITED AIRCRAFT CORPORATION.

Canadian Curtiss type.

UNITED STATES NAVAL AVIATION.

Several types of Navy seaplanes and anti-aircraft guns.

U. S. ARMY.

Airplanes and equipment.

U. S. AIR MAIL SERVICE.

First Curtiss J. N.-4 Mail Plane with a record of a full year's service. This ship was equipped with Wright motor.

GALLAUDET AIRCRAFT CORPORATION.

Exhibit of motors and photographs.

PACKARD MOTOR CAR COMPANY.

Packard Type 1-A-744 Aero Engine -8 cylinder 160 h.p. at 1525 r.p.m.

ACCESSORIES, ETC.

Aerial Age Weekly, Aero Club of Illinois, Arthur Johnson Mfg. Company, Aviation Clubs of Chicago, Brewster-Goldsmith Corp., D. G. Cantu (Caproni), Edstrom Machinery Co., Essenkay Products Co., Everyday Engineering Magazine, Floyd Smith Aerial Equipment Co., Gardner-Moffat Co., Inc., Thos. F. Hamilton, Home Insurance Company, Illinois Model Aero Club, John A. Roebling Sons Co., Maurice S. Wetzel, Tale Spins, Whittemore-Hamm Co., Wixon Products, Van Schaack Bros., Chemical Co.

SAN FRANCISCO AERO SHOW

The San Francisco Aeronautical Show was held in the Civic Auditorium April 21st to 28th. During the week races were held and the Pacific Aeronautical Association was formed, consisting of all the aviation clubs in the Pacific Coast states.

SUMMARY OF EXHIBITS

AIRCRAFT:-Aeromarine Plane and Motor Company, Continental Aircraft, Inc., Boeing Airplane Company, Curtiss Aeroplane and Motor Corporation and Earl P. Cooper Airplane and Motor Company, Dayton Wright Company, Robert G. Fowler, Goodyear Tire & Rubber Company, Loughead Aircraft Manufacturing Company, The Glenn L. Martin Company, Air Service U. S. Army, United States Naval Aviation, Wright Aeronautical Corporation.

ENGINES:-Aeromarine Plane and Motor Company, Continental Aircraft, Inc., Curtiss Aeroplane and Motor Corporation, Earl P. Cooper Airplane and Motor Company, Hall-Scott Motor Car Company.

MISCELLANEOUS :-Tale Spins (aeronautical publication), John A. Roebling Sons Co., Ace (aeronautical publication), Fred Hartsook (aerial photography), Pacific Aeronautics (aeronautical publication), Pacific Model Aero Club, Pacific Aero Club, Jacuzzi Brothers (propellers).

SUMMARY OF INDUSTRIAL ACTIVITIES
AEROMARINE PLANE & MOTOR COMPANY

Sales Offices: Times Bldg., New York City.
Factory Keyport, N. J.

During the past year the Aeromarine Plane and Motor Company intensified the application of its post-war policy, adopted after the Armistice, which holds in the sentence To develop marine aircraft for public uses." To answer the demand for a small size flying boat, which would be adaptable to touring purposes in conditions of all comfort, Aeromarine produced in the winter of 1919-20 its Model 50 cabin flying boat. This is a development of the Aeromarine Model 40 which was produced during the war for training. The Model 50 Flying Boat has the same dimensions as the Navy Training Model, its span being 41 feet 6 inches, its overall length 28 feet 11 inches and its maximum height 12 feet 7 inches. Its engine is, however, more powerful, consisting of an Aeromarine Model B-8 water-cooled type, which develops 150 horsepower and gives the flying boat a maximum speed of 75 miles per hour and a climb of 2,200 feet in ten minutes. The capacity of the gasoline tanks is 58 gallons, which affords the Aeromarine Model 50 a radius of operation of 320 miles at full speed. The machine weighs empty 2,375 pounds and carries a useful load of 825 pounds, making a total weight of 3,200 pounds. Instead of being seated in an open cock-pit, the occupants are sheltered against the rush of air and the weather by an enclosed, luxuriously appointed cabin, to which access is had through liberal size side doors. The cabin contains three upholstered seats, the pilot forward and two passengers aft, and affords all the conveniences of a well appointed limousine. The success which attended the extended operation of the foregoing types prompted Aeromarine to develop a much larger flying boat. With this end in view, the company acquired from the U. S. Navy a number of F-5-L flying boats which formed part of the naval surplus equipment. These were entirely re-fitted. Two comfortable cabins, having a total seating capacity of eleven persons, were fitted forward and aft of the wings, respectively, while the pilot cockpit was placed amidships in a raised position so as to afford maximum visibility.

Although the main effort of Aeromarine was brought to bear on the development of flying boats adapted to public uses, the needs of the U. S.

Navy for specially designed craft were also given careful consideration. As a result a new type of seaplane was produced which is designed to take off from the turrets of a battleship.

The Aeromarine Model A. S. ship's scout is a twin-float, two-seater seaplane. Pilot and observer, the latter also acting as a gunner, sit one behind the other in a narrow, streamlined fuselage just aft of the wings. The pronounced stagger of the wings makes it possible for them not only to see everything above them and thus ward off in time enemy aircraft attacks, but also see ahead and directly downward, which is important for safe landings. Mounted on the rear cockpit is a machine gun which the observer can swing throughout almost an entire hemisphere, thus affording the plane effectual protection. For this purpose the rudder is so designed that no part projects above the fuselage. This makes it possible to fire the machine gun to the rear in the centerline of the craft and eliminates the blind spot which would afford the enemy a safe point for attack. As these types of aircraft are intended for scouting only, they carry no bombs, the purpose of the machine gun being merely to enable the pilot to fight his way through enemy aircraft.

The Aeromarine model A. S. has an overall span of 37 feet 6 inches, an overall length of 30 feet and a maximum height of 11 feet. The total supporting area is 391 square feet. The power plant is a 300 horsepower Wright engine. The high speed of the Aeromarine Model A. S. is about 110 miles per hour, and the landing speed 52 miles per hour, while the climb is 5000 feet in the first ten minutes off the water. The weight of the machine empty is 1743 pounds, the useful load amounts to 987 pounds, making a total flying weight of 2730 pounds.

Perhaps the most outstanding instance of the many and varied activities of Aeromarine during 1920 was the success attending the creation of a new aero engine, called Type U-8D. The U-8D aero engine was specially designed to answer the requirements of commercial and military aviation for a power plant that would combine great sturdiness, dependable operation, low fuel and oil consumption and general accessibility. This engine is of the water-cooled eight cylinder V type, with the cylinder arranged around a common crankcase in two rows of four and having an included angle of 60 degrees. The bore is 44 inches and the stroke 61⁄2 inches, giving a total piston displacement of 737.67 cubic inches. The rated horsepower is 180 at 1750 r.p.m. and the normal brake horsepower 195 at 1750 r.p.m. The fuel consumption is 0.471 pounds per horsepower hour, and the oil consumption is 0.011 pounds per horsepower hour, both at normal brake horsepower. The Model U-8D engine weighs complete with propeller hub and bolts 511 pounds, and with electric generator and self starter 550 pounds.

The tests of this engine from the very beginning have been an unqualified success. The Navy Department put it through the official 50-hour run. It completed the test without grinding valves, cleaning carbon, or disassembly beyond the removal of the valve cover for inspection of the rockers, nor were any spark plugs changed. The last twenty hours of the test were made in a continuous run, at the conclusion of which the motor was disassembled and all parts were inspected. The general condition of the engine was found to be excellent, the remarkable condition of the valves and valve seats and the extremely slight traces of carbon being specially noteworthy. During this test the engine developed over 200 h.p. and its rated speed of 1750 r.p.m. for half an hour, an excess of 11 per cent. over the rated horsepower, while 2000 r.p.m. 220 h.p. was developed.

BOEING AIRPLANE COMPANY

Plant and General Offices: Seattle, Washington.

The Boeing Airplane Company by means of its engineering and testing department is keeping pace with new development.

Throughout the year the Company has maintained a flying station at Seattle, and, during last winter, at North Island, San Diego, California, during which time a number of noteworthy undertakings have been carried out, made possible by the stamina and reliability of Boeing Aircraft.

Chief among these may be mentioned the achievement of the first ship built of the B. B.-L-6 type which was the first airplane to fly over the summit of Mount Rainier, 14,400 feet above sea level. An account of this flight will be found in Chapter II.

During the past year the Boeing Airplane Company has remodeled over 110 DeHaviland 4's into the more modern De Haviland 4-B's. Subsequent to the completion of the DeHaviland contract, the Company was awarded a contract for the manufacture of ten type "G.A.X." armored triplanes for the U. S. Army. This type machine is unique, being, as far as ascertainable, the only armored ground attack machine in the world. The design of these ships was furnished by the Engineering Division of the U. S. Air Service at McCook Field, Dayton, Ohio.

FACTORIES: :

CURTISS AEROPLANE & MOTOR CORPORATION
General Offices: Garden City, L. I., N. Y.

FLYING FIELDS:

SUPPLY AND
REPAIR DEPOTS:

SALES

DISTRIBUTORS

AND DEALERS:

President

Garden City

Buffalo, N. Y.

Waukegan, Ill.

Curtiss Flying Field, Garden City, L. I., N. Y.
Kenilworth Field, Buffalo, N. Y.

Curtiss Flying Station, Atlantic City, N. J.

Curtiss Airport, Atlantic City, N. J.

Curtiss Flying Station, Newport News, Va.

Curtiss Flying Field, Waukegan, Ill.

Dallas, Tex.

Houston, Tex.

Sacramento, Calif.

All parts of United States,

South America, and

The Far East.

OFFICERS

Assistant to the President.

Vice-President

Secretary and Treasurer.

C. M. Keys

C. Roy Keys Frank H. Russell . J. A. B. Smith

During 1920, the Curtiss Aeroplane & Motor Corporation underwent readjustment and reorganization, the most significant aspects of which were the assumption of the presidency by C. M. Keys, the withdrawal of the Willys motor car interests, and the return of Glenn H. Curtiss to active participation in the management of the company as a member of the Board of directors and chief of engineering. All the operations of the Curtiss Engineering Corp. are carried on as part of the activities of the Curtiss Aeroplane & Motor Corp.

Due to the fact that many machines of Curtiss design and manufacture were available shortly after the signing of the Armistice, much of the commercial activity has been carried on with the assistance of Curtiss products. During the year the company continued the development and production of the three-passenger "Oriole" land plane and three-passenger "Seagull " seaplane, and late in the summer the new single-motored "Eagle" was brought out.

This "Eagle," equipped with a 400 horsepower Liberty engine and capable of carrying ten persons or three-quarters of a ton of freight at the rate of 105 miles an hour for ten hours, was the chief new contribution of the Curtiss Company to commercial aeronautics during the year.

The "Eagle," in test flights made at Garden City, set new records for weight carried per horsepower. Piloted by Bert Acosta. the big machine made several successful flights, carrying aloft a useful load of 3533 pounds which, figured in units of horsepower, amounted to nearly 9 pounds per unit, the greatest carrying capacity, so far as reported, of any machine yet produced.

This machine is adapted to either passenger or freight carrying. Entrance is made through a side door reached by means of disappearing steps. The enclosed cabin compartment is finished in leather with eight individual leather upholstered seats, staggard to permit easy movability; dome lights, curtained windows of celluloid and triplex, giving protection from wind and noise, and at the same time free vision; compartment for luggage to rear of passenger cabin.

The reorganization of the Curtiss Company was also marked by the purchase from the Government of Hazelhurst Field adjacent to the Curtiss Plant at Garden City. The Company's policy is to make this new Curtiss Field available as far as possible to the general public. The Aero Club of America has accepted the offer of club quarters and hangar space at the field.