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Airplane Performance as Influenced by the Use of a Supercharged Engine

Description: "The question of the influence of a supercharged engine on airplane performance is treated here in a first approximation, but one that gives an exact idea of the advantage of supercharging. Considered here is an airplane that climbs first with an ordinary engine, not supercharged, and afterwards climbs with a supercharged engine. The aim is to find the difference of the ceilings reached in the two cases" (p. 1).
Date: May 1920
Creator: de Bothezat, George
Partner: UNT Libraries Government Documents Department
open access

Notes on the Theory of the Accelerometer

Description: Report discusses several types of accelerometers and how they function. Methods for reducing error and determining the source of the error, including the best placement for the device, are included.
Date: May 1920
Creator: Warner, E. P.
Partner: UNT Libraries Government Documents Department
open access

Performance of a 300-horsepower Hispano-Suiza airplane engine

Description: The National Bureau of Standards tested a 300-horsepower Hispano-Suiza engine to determine the characteristic performance of the engine at various altitudes. The engine was operated at the ground, at 25,000 feet, and at intermediate altitudes, both at full loads similar to those that would be imposed upon the engine at various speeds by a propeller whose normal full-load speed was 1,800 r.p.m. Friction horsepower also was determined in order that the mechanical efficiency of the engine might be… more
Date: May 12, 1920
Creator: Sparrow, S. W. & White, H. S.
Partner: UNT Libraries Government Documents Department
open access

The Problem of the Helicopter

Description: Report discussing some of the issues regarding the design and operation of helicopters and the theoretical basis behind them. Some particular issues covered include propeller blade design, helicopters in forced descent, horizontal travel, and stability and control.
Date: May 1920
Creator: Warner, E. P.
Partner: UNT Libraries Government Documents Department
open access

Relation of Rib Spacing to Stress in Wing Planes

Description: The stress relations to the fabric and the rib consequent upon a change of spacing between ribs in a wing plane are discussed. Considering the wing plane as a static structure, and ignoring the question of aerodynamic efficiency, it appears that the unit stress in the rib and fabric will remain constant for constant p if the linear dimensions of both rib and fabric are increased alike, viz., if wing and fabric remain geometrically similar. Since the bulge and the structural dimensions remain ge… more
Date: May 1920
Creator: Zahm, A. F.
Partner: UNT Libraries Government Documents Department
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