March 1, 1920

The Starting of Airplane Engines

Invention in Aeronautics

The Model J-2 Mail Plane

114115

The Starting of Airplane Engines

With all internal combustion engines there exists the possibility of a backfire taking place. By this is meant that an explosion takes place before the crank reaches its out dead centre, with the result that the engine rotates in the direction opposite to that in which it is designed to run.

112113

Invention in Aeronautics

From time immemorial we have had vessels that could float on water because the density of that medium permits buoyancy, and the air also was found to give buoyant support since the days of the hot air balloon; but the real conquest of the air came only when a controlled airplane was caused through speed of its movement to convert the tenuous atmosphere into a weight sustaining medium.

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The Model J-2 Mail Plane

General.—This mail plane was designed and constructed with the distinct idea of permitting the use of as many parts of the standard DH-4 as possible in the construction of an economical twin-engine machine. Such parts as were used were not changed in any manner excepting reinforcements where necessary.
9899

The Thomas-Morse MB-4 Mail Plane

In response to bids for mail planes issued by the Post Office Department which were opened the latter part of June, 1919, the Thomas-Morse Aircraft Corp. prepared a design complying in general with the specifications issued, which stipulated among other things that two or more motors of either the Liberty or Hispano-Suiza type were to be used.

114115

Maintenance of Gas Purity By Purging

Chief Aeronautical Engineer, the Goodyear Tire and Rubber Co.

106107

The Packard Fuelizer

110111

The Goodyear Automatic Gas Valve

Aero Design Dept., The Goodyear Tire and Rubber Co.

102103

The L. W. F. Owl Freight Plane

108109

Short Sporting Type Seaplane

The Short sporting type seaplane is designed as a general utility machine. The functions it will fill are numerous, and for convenience can be described under two headings:—military and commercial. Military.—Accommodation is provided for pilot and three passengers. The seating arrangements are:—the two front seats tandem fashion and provided with dual control, the rear seats side-by-side.
102103

The Orenco Type F 4-Seater Tourist Plane

The Orenco four-place tourister’s most attractive feature is the double side-by-side seating arrangement that eliminates the feeling of isolation and lack of companionship usually associated with all planes of the tandem type. The pilot and his three companions enjoy the convenient placing that gives such security and comfort and the congenial chumminess it promotes.

February 151920 March 151920