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  Partner: UNT Libraries Government Documents Department
 Decade: 1940-1949
 Year: 1942
 Month: August
 Collection: Technical Report Archive and Image Library
Aerodynamic problems in the design of efficient propellers

Aerodynamic problems in the design of efficient propellers

Date: August 1, 1942
Creator: Feldman, Lewis
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Aerodynamic tests of an M-31 bomb in the 8-foot high-speed tunnel

Aerodynamic tests of an M-31 bomb in the 8-foot high-speed tunnel

Date: August 25, 1942
Creator: Smith, Norman F
Description: None
Contributing Partner: UNT Libraries Government Documents Department
A comparison of the results from general tank tests of 1/6- and 1/12-full-size models of the British Singapore IIC flying boat

A comparison of the results from general tank tests of 1/6- and 1/12-full-size models of the British Singapore IIC flying boat

Date: August 1, 1942
Creator: Truscott, Starr & Dawson, John R
Description: A 1/6-full-size model of the hull of the British Singapore IIC flying boat was tested in the NACA tank. The results are given in the form of charts and are compared with the results of previous tests made in the NACA tank of a 1/12-full-size model, published in NACA T.N. No. 580, and with the results of tests made in the British R.A.E. tank of another 1/6-full-size model of the same hull. When the data from the tests of the 1/6- and 1/12-full-size models were compared on the basis of Froude's law of comparison, differences were found. This fact supported the belief that the small scale of the model and the use of a model that was too small to suit the equipment of the NACA tank had caused the results of the tests of the 1/12-full-size model to be less reliable than the results of the tests of the 1/6-full-size model. The results of the tests of the two models agreed sufficiently well to show that test of a small model, if made meticulously and with suitable equipment, may give useable results, but that a larger model should be used whenever feasible. The results of the NACA tests of ...
Contributing Partner: UNT Libraries Government Documents Department
Design of tools for press-countersinking or dimpling 0.040-inch-thick-24S-T sheet

Design of tools for press-countersinking or dimpling 0.040-inch-thick-24S-T sheet

Date: August 1, 1942
Creator: Templin, R L & Fogwell, J W
Description: A set of dimpling tools was designed for 0.040-inch 24S-T sheet and flush-type rivets 1/8 inch in diameter with 100 degree countersunk heads. The dimples produced under different conditions of pressure, sheet thickness, and drill diameter are presented as cross-sectional photographs magnified 20 times. The most satisfactory values for the dimpling tools were found to be: maximum punch diameter, 0.231 inch; maximum die diameter, 0.223 inch; maximum mandrel diameter, 0.128 inch; dimple angle, 100 degree; punch springback angle, 1 1/2 degree; and die springback angle, 2 degree.
Contributing Partner: UNT Libraries Government Documents Department
Effect of normal pressure on the critical compressive stress of curved sheet

Effect of normal pressure on the critical compressive stress of curved sheet

Date: August 25, 1942
Creator: Rafel, Norman
Description: Results are presented of tests of two specimens tested to study the effect of normal pressure on the critical compressive stress for thin curved sheets. These specimens are designated by their respective rib spacings of 10 inches and 30 inches. The relationship between compressive stress and normal pressure at which buckles disappeared is independent of whether the buckles were made to disappear by increase of normal pressure or decrease of compressive stress. (author).
Contributing Partner: UNT Libraries Government Documents Department
The effect of propeller operation on the air flow in the region of the tail plane for a twin-engine tractor monoplane

The effect of propeller operation on the air flow in the region of the tail plane for a twin-engine tractor monoplane

Date: August 1, 1942
Creator: Sweberg, Harold H
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Effect of rivet and spot-weld spacing on the strength of axially loaded sheet-stringer panels

Effect of rivet and spot-weld spacing on the strength of axially loaded sheet-stringer panels

Date: August 1, 1942
Creator: Ramberg, Walter; Levy, Samuel & Mcpherson, Albert E
Description: None
Contributing Partner: UNT Libraries Government Documents Department
The effect of spanwise mass distribution upon the spin characteristics of airplanes as determined by model tests conducted in the free-spinning wind tunnel

The effect of spanwise mass distribution upon the spin characteristics of airplanes as determined by model tests conducted in the free-spinning wind tunnel

Date: August 1, 1942
Creator: Kamm, Robert W
Description: None
Contributing Partner: UNT Libraries Government Documents Department
The Formation of Ice on Aircraft

The Formation of Ice on Aircraft

Date: August 1, 1942
Creator: Bleeker, W.
Description: The phenomenon accompanying the formation of ice on aircraft has been frequently discussed. The consequences of ice formation have been briefly analyzed in an article , but a definite physical solution of the problem has not been reached up to the present. Most of the authors agree that subcooled water droplets play a prominent part, but they fail to specify the exact manner in which this occurs.
Contributing Partner: UNT Libraries Government Documents Department
Generalized selection charts for bombers powered by one, two, four, and six 3000-horsepower engines I : capacity and economy

Generalized selection charts for bombers powered by one, two, four, and six 3000-horsepower engines I : capacity and economy

Date: August 1, 1942
Creator: Hill, Paul R
Description: None
Contributing Partner: UNT Libraries Government Documents Department
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