In Partnership With

March 1, 1919

Liberty Aircraft Engine Ignition

Characteristics of American Built Airplanes, Seaplanes and Flying Boats

Douglas Automatic Airplane Ignition Interrupter

150151

Liberty Aircraft Engine Ignition

The reliability of all high powered aeronautical engines in flight is largely governed by the dependability of its spark plugs. The service, due to the extreme temperature and pressure conditions, is so severe that satisfactory performance can only be obtained by the use of duplicate spark plugs in each cylinder.

142143

Characteristics of American Built Airplanes, Seaplanes and Flying Boats

1.—Small Single-Seaters. J. V. Martin 2.—Single-Seater Training Machines. Ordnance Standard Thomas-Morse C.S.A. Bristol 3.—Single-Seater Pursuit Machines. Curtiss Curtiss Curtiss 4.—Two-Seater Training Machines. (Primary ) Curtiss
156157

Douglas Automatic Airplane Ignition Interrupter

This instrument, designed to increase the safety factor in flying, is a product of the Great War. It is unique in its particular field and in its functioning is said to have met every requirement. The interrupter is an invention of Theodore Douglas, president of The Duplex Engine Governor Co., Inc., of Brooklyn, N. Y., and was developed by him under the auspiees of the National Advisory Committee for Aeronautics.
146147

The Packard Aircraft Engines and Airplane

Aircraft engineers and manufacturers, who were intimately associated with aeronautical development during the war, generally agree that in spite of the wonderful progress which took place during that period, this was necessarily of a forced nature.
160161

Leak and Explosion Proof Gasoline Tank

Among the inventions of military importance which were held secret during the world conflict and are now being released by the Government for publication is a gasoline supply tank for aircraft which is proof against leak or explosion when pierced by bullets.

162163

News of the Fortnight

Aeronautical Exposition The first annual Aeronautical Exposition of the Manufacturers' Aircraft Association, which opens at Madison Square Garden and the 69th Regiment Armory on March 1, and will remain open till March 15, will constitute one of the most representative public expositions of aircraft ever held in the United States.
136137

Present Status of American Airplane and Seaplane Construction

In the present transitional state of the industry it seems very interesting to present data on existing American practice, both as regards machines of purely American design, and machines of foreign design rebuilt or redesigned in this country.

158159

Two Notable Airship Voyages

In view of sundry information which has recently been forthcoming from abroad to the effect that the British "rigid airship R33 is shortly to attempt to cross the Atlantic from England to America, considerable interest attaches to two remarkable airship performances which were made during the war and had, for this reason, been kept secret thus far.
140141

The Lawrance 3-cylinder Airplane Engine

The Lawrance 3-cyl. airplane engine is intended for use on sport type machines to carry either one or two people, and has been designed especially to fill this need. It has been worked out with the idea that a man who wished to take care of his airplane must have the minimum work to do in order to keep it in good condition.
158159

A Goodyear Airship Type

The Goodyear Tire and Rubber Co. during the World War constructed military airships to the limit of its production capacity. These ships varied in size from 75,000 cu. ft. to 170,000 cu. ft. capacity, the overall length of the biggest ship being slightly under 200 ft.

February 151919 March 151919