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  Partner: UNT Libraries Government Documents Department
 Serial/Series Title: NACA Memorandum Report
 Collection: National Advisory Committee for Aeronautics Collection
The effect of valve clearance on knock-limited performance and engine cooling

The effect of valve clearance on knock-limited performance and engine cooling

Date: April 1, 1945
Creator: Brown, Kenneth D
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Effect of Water-Alcohol Injection and Maximum Economy Spark Advance on Knock-Limited Performance and Fuel Economy of a Large Air-Cooled Cylinder

Effect of Water-Alcohol Injection and Maximum Economy Spark Advance on Knock-Limited Performance and Fuel Economy of a Large Air-Cooled Cylinder

Date: August 1, 1945
Creator: Heinicke, Orville H. & Vandeman, Jack E.
Description: An investigation was conducted to determine the effect of a coolant solution of 25 percent ethyl alcohol, 25 percent methyl alcohol, and 50 percent water by volume and maximum-economy spark advance on knock-limited performance and fuel economy of a large air-cooled cylinder. The knock-limited performance of the cylinder at engine speeds of 2100 and 2500 rpm was determined for coolant-fuel ratios of 0.0, 0.2, and 0.4. The effect of water-alcohol injection on fuel economy was determined in constant charge-air flow tests. The tests were conducted at a spark advance of 20 deg B.T.C. and maximum-economy spark advance.
Contributing Partner: UNT Libraries Government Documents Department
Efficiency of a radial-flow exhaust-gas turbosupercharger turbine with a 12.75-inch tip diameter

Efficiency of a radial-flow exhaust-gas turbosupercharger turbine with a 12.75-inch tip diameter

Date: July 1, 1946
Creator: Gabriel, David S
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Endurance tests of a 22-inch-diameter pulse-jet engine with a neoprene-coated valve grid

Endurance tests of a 22-inch-diameter pulse-jet engine with a neoprene-coated valve grid

Date: October 1, 1945
Creator: Breisch, John H
Description: None
Contributing Partner: UNT Libraries Government Documents Department
An estimate of the effect of engine supercharging on the take-off thrust of a typical helicopter at different altitudes and temperatures

An estimate of the effect of engine supercharging on the take-off thrust of a typical helicopter at different altitudes and temperatures

Date: March 1, 1945
Creator: Voglewede, T J
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Estimates of the vertical-tail loads of a Bell P-63A-1 airplane (AAF No. 42-68889) in accelerated rolling maneuvers based on flight tests with two vertical-tail arrangements

Estimates of the vertical-tail loads of a Bell P-63A-1 airplane (AAF No. 42-68889) in accelerated rolling maneuvers based on flight tests with two vertical-tail arrangements

Date: November 1, 1944
Creator: Johnson, Harold I
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Estimation of F-3 and F-4 knock-limited performance ratings for ternary and quaternary blends containing triptane or other high-antiknock aviation-fuel blending agents

Estimation of F-3 and F-4 knock-limited performance ratings for ternary and quaternary blends containing triptane or other high-antiknock aviation-fuel blending agents

Date: January 1, 1948
Creator: Barnett, Henry C
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Estimation of the performance and longitudinal stability and control of a lifting-body type of cargo airplane from tests of simplified models

Estimation of the performance and longitudinal stability and control of a lifting-body type of cargo airplane from tests of simplified models

Date: June 1, 1945
Creator: Feigenbaum, D
Description: None
Contributing Partner: UNT Libraries Government Documents Department
An evaluation of the knock-limited performance of triptane

An evaluation of the knock-limited performance of triptane

Date: March 1, 1946
Creator: Barnett, Henry C
Description: None
Contributing Partner: UNT Libraries Government Documents Department
An Experimental Investigation of Flow Conditions in the Vicinity of an NACA D(Sub S)-Type Cowling

An Experimental Investigation of Flow Conditions in the Vicinity of an NACA D(Sub S)-Type Cowling

Date: August 1, 1946
Creator: Bryant, Rosemary P. & Boswinkle, Robert W.
Description: Data are presented of the flow conditions in the vicinity of an NACA D sub S -type cowling. Tests were made of a 1/2 scale-nacelle model at inlet-velocity ratios ranging from 0.23 to 1.02 and angles of attack from 6 deg to 10 deg. The velocity and direction of flow in the vertical plane of symmetry of the cowling were determined from orifices and tufts installed on a board aligned with the flow. Diagrams showing velocity ratio contours and lines of constant flow angles are given.
Contributing Partner: UNT Libraries Government Documents Department
An Experimental Investigation of NACA Submerged-Duct Entrances

An Experimental Investigation of NACA Submerged-Duct Entrances

Date: May 23, 1945
Creator: Frick, Charles W.; Davis, Wallace F.; Randall, Lauros & Mossman, Emmet A.
Description: The results of an investigation of submerged-duct entrances are presented. It is shown that this type of entrance possesses the following characteristics: 1) very high-critical-compressibility speeds throughout the range of high-speed inlet velocity ratios; 2) very low pressure losses for the air entering the duct at all inlet-velocity ratios; and, 3) low external drag. These characteristics are obtained by the proper shaping of the contour of the upstream approach to the submerged inlets and by proper alignment of the duct lip. Design data are presented and the application of these data to a specific high-speed fighter-airplane design is discussed.
Contributing Partner: UNT Libraries Government Documents Department
F-3 and F-4 engine tests of several high-antiknock components of aviation fuel

F-3 and F-4 engine tests of several high-antiknock components of aviation fuel

Date: November 1, 1944
Creator: Genco, Russell S
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Flight and test-stand investigation of high-performance fuels in double-row radial air-cooled engines I : determination of cooling characteristics of flight engine

Flight and test-stand investigation of high-performance fuels in double-row radial air-cooled engines I : determination of cooling characteristics of flight engine

Date: December 1, 1944
Creator: Pragliola, Philip C
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Flight and test-stand investigation of high-performance fuels in double-row radial air-cooled engines II : flight knock data and comparison of fuel knock limits with engine cooling limits in flight

Flight and test-stand investigation of high-performance fuels in double-row radial air-cooled engines II : flight knock data and comparison of fuel knock limits with engine cooling limits in flight

Date: December 1, 1944
Creator: Werner, Milton
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Flight and test-stand investigation of high-performance fuels in modified double-row radial air-cooled engines I : determination of the cooling characteristics of the flight engine

Flight and test-stand investigation of high-performance fuels in modified double-row radial air-cooled engines I : determination of the cooling characteristics of the flight engine

Date: July 1, 1945
Creator: White, H Jack
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Flight and test-stand investigation of high-performance fuels in modified double-row radial air-cooled engines II : flight knock data and comparison of fuel knock limits with engine cooling limits in flight

Flight and test-stand investigation of high-performance fuels in modified double-row radial air-cooled engines II : flight knock data and comparison of fuel knock limits with engine cooling limits in flight

Date: August 1, 1945
Creator: Blackman, Calvin C
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Flight and Test-Stand Investigation of High-Performance Fuels in Modified Double-Row Radial Air-Cooled Engines III: Knock-Limited Performance of 33-R as Compared with a Triptane Blend and 28-R in Flight

Flight and Test-Stand Investigation of High-Performance Fuels in Modified Double-Row Radial Air-Cooled Engines III: Knock-Limited Performance of 33-R as Compared with a Triptane Blend and 28-R in Flight

Date: August 1, 1945
Creator: Blackman, Calvin C. & White, H. Jack
Description: A comparison has been made in flight of the antiknock characteristics of 33-R fuel with that of 28-R and a triptane blent. The knock-limited performance of the three fuels - 33-R, a blend of 80 percent 28-R plus 20 percent triptane (leaded to 4.5 ml TEL/gal), and 28-R - was investigated in two modified 14-cylinder double-row radial air-cooled engines. Tests were conducted on the engines as installed in the left inboard nacelle of an airplane. A carburetor-air temperature of approximately 85 deg F was maintained. The conditions covered at an engine speed of 2250 rpm were high and low blower ratios and spark advances of 25 deg and 32 deg B.T.C. For an engine speed of 1800 rpm only the high-blower condition was investigated for both 25 deg and 32 deg spark advances. For the conditions investigated the difference between 33-R and the triptane blend was found to be slight; the performance of 33-R fuel, however, was slightly higher than that of the triptane blend in the lean region. The knock-limited power obtained with the 33-R fuel was from 14 to 28 percent higher than that of the 28-R fuel for the entire range of test conditions; the greatest improvement ...
Contributing Partner: UNT Libraries Government Documents Department
Flight investigation of factors affecting the carburetor ram and nacelle drag of an A-26B airplane

Flight investigation of factors affecting the carburetor ram and nacelle drag of an A-26B airplane

Date: July 1, 1946
Creator: Danforth, Edward C B , III
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Flight investigation of modifications to improve the elevator control-force characteristics of the Curtiss SB2C-10 airplane in maneuvers

Flight investigation of modifications to improve the elevator control-force characteristics of the Curtiss SB2C-10 airplane in maneuvers

Date: April 1, 1945
Creator: Reeder, John P
Description: None
Contributing Partner: UNT Libraries Government Documents Department
A Flight Investigation of the Ice-Prevention Requirements of the United States Naval K-Type Airship

A Flight Investigation of the Ice-Prevention Requirements of the United States Naval K-Type Airship

Date: October 19, 1945
Creator: Hillendahl, Wesley H
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Flight Investigation to Improve the Dynamic Longitudinal Stability and Control-Feel Characteristics of the P-63A-1 Airplane (AAF No. 42-68889) with Closely Balanced Experimental Elevators

Flight Investigation to Improve the Dynamic Longitudinal Stability and Control-Feel Characteristics of the P-63A-1 Airplane (AAF No. 42-68889) with Closely Balanced Experimental Elevators

Date: July 1, 1946
Creator: Johnson, Harold I.
Description: Results of flight tests of a control-feel aid presented. This device consisted of a spring and dashpot connected in series between the control stick and airplane structure. The device was tested in combination with an experimental elevator and bobweight which had given unsatisfactory dynamic stability and control-feel characteristics in previous tests. The control-feel aid effected marked improvement in both the control-feel characteristics and the control-feel dynamic longitudinal stability of the airplane.
Contributing Partner: UNT Libraries Government Documents Department
Flight measurements by various methods of the drag characteristics of the XP-51 airplane

Flight measurements by various methods of the drag characteristics of the XP-51 airplane

Date: June 1, 1946
Creator: Beadle, Dorothy E
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Flight measurements of the effect on elevator stick forces of stabilizer incidence and elevator rib spacing on the P-63A-1BE series airplane

Flight measurements of the effect on elevator stick forces of stabilizer incidence and elevator rib spacing on the P-63A-1BE series airplane

Date: October 1, 1945
Creator: Mungall, Robert G
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Flight measurements of the flying qualities of an F6F-3 airplane (BuAer No. 04776) I : longitudinal stability and control

Flight measurements of the flying qualities of an F6F-3 airplane (BuAer No. 04776) I : longitudinal stability and control

Date: February 1, 1945
Creator: Reeder, John P
Description: None
Contributing Partner: UNT Libraries Government Documents Department