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in creator/contributor: "Schey, Oscar W."

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The effect of increased carburetor pressure on engine performance at several compression ratios

The object of this investigation was to determine the effect of increasing the carburetor pressures from 30 to 40 inches of mercury, at compression ratios from 3.5 to 7.5, on the power, on the maximum cylinder pressures, on the fuel consumption, and on the other performance characteristics of an engine. A roots-type aircraft-engine supercharger was used to maintain the desired carburetor pressure.

Date: May 29, 1931

Creator: Schey, Oscar W. & Rollin, Vern G.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

The effect on airplane performance of the factors that must be considered in applying low-drag cowling to radial engines

From Summary: "This report presents the results of flight tests with three different airplanes using several types of low-drag cowling for radial air-cooled engines. The greater part of the tests were made with a Curtiss XF7Cc-1 (Sea Hawk) with a 410 horsepower. Wasp engine, using three fuselage nose shapes and six types of outer cowling. The six cowlings were: a narrow ring, a wide ring, a wide cowling similar in the original NACA cowling, a thick ring incorporating an exhaust collector, a sin… more

Date: November 25, 1931

Creator: McAvoy, William H.; Schey, Oscar W. & Young, Alfred W.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

The Comparative Performance of Superchargers

"This report presents a comparison of superchargers on the basis of the power required to compress the air at a definite rate, and on the basis of the net engine power developed at altitudes from 0 to 40,000 feet. The investigation included geared centrifugal, turbine-driven centrifugal, roots, and vane-type superchargers. It also includes a brief discussion of the mechanical limitations of each supercharger and explains how the method of control affects the power requirements" (p. 425).

Date: January 13, 1931

Creator: Schey, Oscar W.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

The effect of valve timing upon the performance of a supercharged engine at altitude and an unsupercharged engine at sea level

This investigation was conducted to determine the comparative effects of valve timing on the performance of an unsupercharged engine at sea level and a supercharged engine at altitude. The tests were conducted on the NACA universal test engine. The timing of the four valve events was varied over a wide range; the engine speeds were varied between 1,050 and 1,500 r.p.m.; the compression ratios were varied between 4.35:1 and 7.35:1. The conditions of exhaust pressure and carburetor pressure of a … more

Date: February 4, 1931

Creator: Schey, Oscar W. & Biermann, Arnold E.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

The comparative performance of an aviation engine at normal and high inlet air temperatures

"This report presents some results obtained during an investigation to determine the effect of high inlet air temperature on the performance of a Liberty 12 aviation engine. The purpose of this investigation was to ascertain, for normal service carburetor adjustments and a fixed ignition advance, the relation between power and temperature for the range of carburetor air temperatures that may be encountered when supercharging to sea level pressure at altitudes of over 20,000 feet and without int… more

Date: February 11, 1927

Creator: Gardiner, Arthur W. & Schey, Oscar W.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

A Preliminary Investigation of Supercharging an Air-Cooled Engine in Flight

"This report presents the results of preliminary tests made on the effects of supercharging an air-cooled engine under airplane flight conditions. Service training airplanes were used in the investigation equipped with production types of Wright J engines. A N.A.C.A. Roots type supercharger was driven from the rear of the engine. In addition to measuring those quantities that would enable the determination of the climb performance, measurements were made of the cylinder-head temperatures and th… more

Date: July 30, 1927

Creator: Ware, Marsden & Schey, Oscar W.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

An Investigation of the Use of Discharge Valves and an Intake Control for Improving the Performance of N.A.C.A. Roots Type Supercharger

"This report presents the results of an analytical investigation on the practicability of using mechanically operated discharge valves in conjunction with a manually operated intake control for improving the performance of N. A. C. A. Roots type superchargers. These valves, which may be either of the oscillating or rotating type, are placed in the discharge opening of the supercharger and are so shaped and synchronized with the supercharger impellers that they do not open until the air has been… more

Date: June 29, 1928

Creator: Schey, Oscar W. & Wilson, Ernest E.

Item Type: Report

Partner: UNT Libraries Government Documents Department