July 15, 1920

July 15, 1920

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Aeronautic Instruments

By Mayo D. Hersey16 min

The Packard 500-600 Hp. Aircraft Engine

Dynamic Lift and Ceiling for Airships

By Alexander Klemin9 min

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Aeronautic Instruments

Design, Development, and Production The design of aeronautic instruments is at present almost wholly on a cut-and-try basis. The Bureau of Standards has made some progress, however, in placing instrument design on a rational basis. Consideration has been given to such general problems as:

By Mayo D. Hersey16 min

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The Packard 500-600 Hp. Aircraft Engine

The Packard 1-A-2025 aircraft engine is the design of Col. Jesse G. Vincent, who was one of the creators of the Liberty motor, and is now vice president of engineering at the Detroit plant of the Packard Motor Car Co., where the engine was built.
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Dynamic Lift and Ceiling for Airships

The mathematical theory of the airship—whether equipped with ballonets or not—is practically complete as regards altitude maneuvers. But the dynamic effects on the airship both in maneuvering and in turn on ceiling have not been considered hitherto.

By Alexander Klemin9 min

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The Advisory Committee for Aeronautics

The report of the Advisory Committee for Aeronautics (British) for 1918-19 which, although it is dated last August, has only just been issued, indicates how greatly the activities of the Committee have had to be expanded in order to cope with the many demands from the R.A.F. and the industry.
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Editorials

LITTLE has been written of this phase of the study of lighter-than-air craft. In this issue the subject is considered quantitatively by a writer who finds some important uses for this force, which has hitherto been regarded as a disturbing factor in the operation of airships.
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Airship Suspensions

As a matter of definition the word “suspension” is used to designate the means by which the car of a non-rigid airship is attached to the envelope. This comprises the cables and any incidental cordage, together with their attachments at each end.

By Ralph H. Upson4 min

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N. A. C. A. Reports

PRELIMINARY REPORT ON FREE FLIGHT TESTS. Synopsis of Report No. 70. National Advisory Committee for Aeronautics. A report of the free flight tests conducted by the National Advisory Committee for Aeronautics to determine some of the charncteristics of two full sized JN-4H airplanes.
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The Efficiency of Airplane Struts

In airplane design it is advantageous to have some method of comparing the power absorbed by struts of various shapes and materials, so that, for the velocity under consideration, the most efficient strut can be used. This is based on the assumption that, at the given velocity, the most efficient strut of a series, all of which are of the same length and which have the same final strength, is the one which absorbs the least power.

By Wallace F. Wiley3 min

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The Fairchild Automatic Camera

The new Fairchild Automatic Aerial Camera, Model A, embodies the latest and most approved ideas in the line of an automatic mapping camera. The magazines, which are detachable, have a capacity of 75 ft. of 24 cm. film (9-7/16 in.) giving a total of 108 exposures.
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The Stout Batwing Monoplane

The Stout Batwing monoplane is a giant wing in which are accommodated machinery, trussing, etc. The engines are set into the leading edge, the passengers are enclosed between the surfaces of the wing section, and every part that is exposed to the air is designed to lift.
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