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  Partner: UNT Libraries Government Documents Department
 Collection: Technical Report Archive and Image Library
Tests of beams having webs with large circular lightening holes

Tests of beams having webs with large circular lightening holes

Date: February 1, 1944
Creator: Levin, L Ross
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Tests of Bell XP-63 low-drag wing model with split flap

Tests of Bell XP-63 low-drag wing model with split flap

Date: September 1, 1941
Creator: Underwood, W J
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Tests of bonded and riveted sheet-stringer panels

Tests of bonded and riveted sheet-stringer panels

Date: June 1, 1954
Creator: Mordfin, Leonard & Wilks, I E
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Tests of Cascades of Airfoils for Retarded Flow

Tests of Cascades of Airfoils for Retarded Flow

Date: October 1, 1947
Creator: Shimoyama, Yoshinori
Description: Test results are present for cascades of airfoils in retarded flow and increasing pressure as corresponds to the case of the impeller of an axial propeller pump and propeller fan.
Contributing Partner: UNT Libraries Government Documents Department
Tests of cast aluminum-alloy mixed-flow impellers

Tests of cast aluminum-alloy mixed-flow impellers

Date: April 1, 1946
Creator: Schwartz, Irving R
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Tests of Coal and Briquets as Fuel for House-Heating Boilers

Tests of Coal and Briquets as Fuel for House-Heating Boilers

Date: 1911
Creator: Randall, D. T.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Tests of exhaust propulsion nozzles

Tests of exhaust propulsion nozzles

Date: May 1, 1943
Creator: Campbell, Paul J
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Tests of five full-scale propellers in the presence of a radial and a liquid-cooled engine nacelle, including tests of two spinners

Tests of five full-scale propellers in the presence of a radial and a liquid-cooled engine nacelle, including tests of two spinners

Date: January 1, 1938
Creator: Biermann, David & Hartman, Edwin P
Description: Wind-tunnel tests are reported of five 3-blade 10-foot propellers operating in front of a radial and a liquid-cooled engine nacelle. The range of blade angles investigated extended from 15 degrees to 45 degrees. Two spinners were tested in conjunction with the liquid-cooled engine nacelle. Comparisons are made between propellers having different blade-shank shapes, blades of different thickness, and different airfoil sections. The results show that propellers operating in front of the liquid-cooled engine nacelle had higher take-off efficiencies than when operating in front of the radial engine nacelle; the peak efficiency was higher only when spinners were employed. One spinner increased the propulsive efficiency of the liquid-cooled unit 6 percent for the highest blade-angle setting investigated and less for lower blade angles. The propeller having airfoil sections extending into the hub was superior to one having round blade shanks. The thick propeller having a Clark y section had a higher take-off efficiency than the thinner one, but its maximum efficiency was possibly lower. Of the three blade sections tested, Clark y, R.A.F. 6, and NACA 2400-34, the Clark y was superior for the high-speed condition, but the R.A.F. 6 excelled for the take-off condition.
Contributing Partner: UNT Libraries Government Documents Department
Tests of five metal model propellers with various pitch distributions in a free wind stream and in combination with model VE-7 fuselage

Tests of five metal model propellers with various pitch distributions in a free wind stream and in combination with model VE-7 fuselage

Date: January 1, 1930
Creator: Lesley, E P & Reid, Elliott G
Description: This report describes the tests of five adjustable blade metal model propellers both in a free wind stream and in combination with a model fuselage with stub wings. The propellers are of the same form and cross section but have variations in radial distributions of pitch. By making a survey of the radial distribution of air velocity through the propeller plane of the model fuselage it was found that this velocity varies from zero at the hub center to approximately free stream velocity at the blade tip. The tests show that the efficiency of a propeller when operating in the presence of the airplane is, over the working range, generally less than when operating in a free wind stream, but that a propeller with a radial distribution of pitch of the same nature as the radial distribution of air velocity through the propeller plane suffers the smallest loss in efficiency.
Contributing Partner: UNT Libraries Government Documents Department
Tests of flat panels with four types of stiffeners

Tests of flat panels with four types of stiffeners

Date: January 1, 1943
Creator: Niles, Alfred S
Description: None
Contributing Partner: UNT Libraries Government Documents Department