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Discharge Characteristics of a Simulated Unit Injection System

Description: "Rate-of-discharge curves that show the discharge characteristics of an injection system having a very short fuel passage are presented. The rate of discharge closely follows the rate of displacement of the injection-pump plunger for open nozzles in which the maximum calculated pressures at the orifice do not exceed a certain value, which is dependent on the particular injection pump. With small orifices and high pump speeds, the rate of discharge does not follow the rate of plunger displacemen… more
Date: November 1938
Creator: Marsh, Edred T.
Item Type: Refine your search to only Report
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The Pressure Available for Ground Cooling in Front of the Cowling of Air-Cooled Airplane Engines

Description: "A study was made of the factors affecting the pressure available for ground cooling in front of a cowling. Most of the results presented were obtained with a set-up that was about one-third full scale. A number of isolated tests on four full-scale airplanes were made to determine the general applicability of the model results. The full-scale tests indicated that the model results may be applied qualitatively to full-scale design and quantitatively as a first approximation of the front pressure… more
Date: November 1938
Creator: Stickle, George W. & Joyner, Upshur T.
Item Type: Refine your search to only Report
open access

Scavenging a Piston-Ported Two-Stroke Cylinder

Description: "An investigation was made with a specially designed engine to determine the scavenging characteristics of a large number of inlet-port shapes and arrangements and the optimum port arrangement and timing for this particular type of engine. A special cylinder construction permitted wide variations in timing for this particular type of engine. A special cylinder construction permitted wide variations in timing as well as in shape and arrangement of both the inlet and exhaust ports" (p. 1).
Date: November 1938
Creator: Rogowski, A. R. & Bouchard, C. L.
Item Type: Refine your search to only Report
open access

Tests of a Contra-Propeller for Aircraft

Description: "Tests of an 8-blade contra-propeller of 32-inch diameter in combination with a 4-inch, 36-inch diameter adjustable pitch, metal propeller at pitch setting of 15, 25, 35, and 45 degrees at 0.75 R were made. The tests showed a significant increase in effective thrust of the combination over that of the propeller alone for value V/nD somewhat below those for maximum efficiency and without a corresponding increase of power absorbed. From 1/2 percent to 2-1/2 percent in propulsive efficiency was th… more
Date: November 1938
Creator: Benson, William M.
Item Type: Refine your search to only Report
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