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 Serial/Series Title: NACA Advanced Restricted Report
 Collection: National Advisory Committee for Aeronautics Collection
Heat-transfer coefficients for air flowing in round tubes, in rectangular ducts, and around finned cylinders

Heat-transfer coefficients for air flowing in round tubes, in rectangular ducts, and around finned cylinders

Date: February 1, 1945
Creator: Drexel, Rober E & Mcadams, William H
Description: Report reviews published data and presents some new data on heat transfer to air flowing in round tubes, in rectangular ducts, and around finned cylinders. The available data for heat transfer to air in straight ducts of rectangular and circular cross section have been correlated in plots of Stanton number versus Reynolds number to provide a background for the study of the data for finned cylinders. Equations are recommended for both the streamlined and turbulent regions, and data are presented for the transition region between turbulent and laminar flow. Use of hexagonal ends on round tubes causes the characteristics of laminar flow to extend to high Reynolds numbers. Average coefficients for the entire finned cylinder have been calculated from the average temperature at the base of the fins and an equation which was derived to allow for the effectiveness of the fins. The available results for each finned cylinder are correlated herein in terms of graphs of Stanton number versus Reynolds number. In general, for a given Reynolds number, the Stanton number increases with increases in both spacing and width of the fins, and is apparently independent of cylinder diameter and temperature difference. For a given coefficient of heat transfer ...
Contributing Partner: UNT Libraries Government Documents Department
Torsion tests of stiffened circular cylinders

Torsion tests of stiffened circular cylinders

Date: May 1, 1944
Creator: Moore, R L & Wescoat, C
Description: The design of curved sheet panels to resist shear involves a consideration of several factors: the buckling resistance of the sheet, the stress at which buckling becomes permanent, and the strength which may be developed beyond the buckling limit by tension-field action. Although some experimental as well as theoretical work has been done on the buckling and tension-field phases of this problem, neither of these types of action appears to be very well understood. The problem is of sufficient importance from the standpoint of aircraft design, it is believed, to warrant further experimental investigation. This report presents the results of the first series of torsion tests of stiffened circular cylinders to be completed in connection with this study at Aluminum Research Laboratories. (author).
Contributing Partner: UNT Libraries Government Documents Department
The effect of high temperature of the cylinder head on the knocking tendency of an air-cooled engine cylinder

The effect of high temperature of the cylinder head on the knocking tendency of an air-cooled engine cylinder

Date: February 1, 1945
Creator: Peters, M D
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Artificial running-in of piston rings

Artificial running-in of piston rings

Date: March 1, 1944
Creator: Machlin, E S
Description: None
Contributing Partner: UNT Libraries Government Documents Department
A cooling correlation of the Wright R-2600-8 engine showing the effect of water as an internal coolant

A cooling correlation of the Wright R-2600-8 engine showing the effect of water as an internal coolant

Date: February 1, 1945
Creator: Engelman, Helmuth W
Description: None
Contributing Partner: UNT Libraries Government Documents Department
The effect of increased cooling surface on performance of aircraft-engine cylinders as shown by tests of the NACA cylinder

The effect of increased cooling surface on performance of aircraft-engine cylinders as shown by tests of the NACA cylinder

Date: July 1, 1944
Creator: Ellerbrock, Herman H , Jr
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Effect of increasing the size of the valve-guide boss on the exhaust-valve temperature and the volumetric efficiency of an aircraft cylinder

Effect of increasing the size of the valve-guide boss on the exhaust-valve temperature and the volumetric efficiency of an aircraft cylinder

Date: February 1, 1945
Creator: Peters, Max D
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Calculations of economy of 18-cylinder radial aircraft engine with exhaust-gas turbine geared to the crankshaft at cruising speed

Calculations of economy of 18-cylinder radial aircraft engine with exhaust-gas turbine geared to the crankshaft at cruising speed

Date: January 1, 1945
Creator: Zimmerman, Richard H
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Construction of wire strain gages for engine application

Construction of wire strain gages for engine application

Date: December 1, 1943
Creator: Tucker, Maurice
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Continuous use of internal cooling to suppress knock in aircraft engines cruising at high power

Continuous use of internal cooling to suppress knock in aircraft engines cruising at high power

Date: August 1, 1944
Creator: Bell, Arthur H
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Determination of gas temperatures from the frequency of knock-induced gas vibrations in an internal-combustion engine

Determination of gas temperatures from the frequency of knock-induced gas vibrations in an internal-combustion engine

Date: January 1, 1946
Creator: Evvard, J C
Description: None
Contributing Partner: UNT Libraries Government Documents Department
The effect of carburetor-air temperature on the cooling characteristics of a typical air-cooled engine cylinder

The effect of carburetor-air temperature on the cooling characteristics of a typical air-cooled engine cylinder

Date: September 1, 1945
Creator: Buckner, Howard A , Jr
Description: None
Contributing Partner: UNT Libraries Government Documents Department
The effect of carburetor throttle settings on the velocity distribution at the outlet of a vaned and vaneless supercharger inlet elbow

The effect of carburetor throttle settings on the velocity distribution at the outlet of a vaned and vaneless supercharger inlet elbow

Date: September 1, 1945
Creator: Baas, Edmund J
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Correlation of exhaust-valve temperatures with engine operating conditions and valve design

Correlation of exhaust-valve temperatures with engine operating conditions and valve design

Date: January 1, 1945
Creator: Sanders, J C
Description: None
Contributing Partner: UNT Libraries Government Documents Department
The effect of engine conditions on the lead susceptibility of paraffinic fuels

The effect of engine conditions on the lead susceptibility of paraffinic fuels

Date: October 1, 1944
Creator: Imming, Harry S
Description: None
Contributing Partner: UNT Libraries Government Documents Department
The effect of compression ratio, cooled exhaust gas mixed with inlet air, and inlet-air temperature on the knock-limited performance of a full-scale single-cylinder engine

The effect of compression ratio, cooled exhaust gas mixed with inlet air, and inlet-air temperature on the knock-limited performance of a full-scale single-cylinder engine

Date: March 1, 1944
Creator: Breitwieser, Roland
Description: None
Contributing Partner: UNT Libraries Government Documents Department
The effect of continuous knock on the endurance of an aircraft engine cylinder

The effect of continuous knock on the endurance of an aircraft engine cylinder

Date: March 1, 1944
Creator: Peters, M D
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Effect of coaxial lapping of cast-iron piston rings on ring performance

Effect of coaxial lapping of cast-iron piston rings on ring performance

Date: April 1, 1944
Creator: Wilson, John G
Description: None
Contributing Partner: UNT Libraries Government Documents Department
The effects of an increase in the concentration of ethylene dibromide in a leaded fuel on lead deposition, corrosion of exhaust valves, and knock-limited power

The effects of an increase in the concentration of ethylene dibromide in a leaded fuel on lead deposition, corrosion of exhaust valves, and knock-limited power

Date: June 1, 1945
Creator: Zipkin, M A
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Correlation of single-cylinder cooling tests of a Pratt and Whitney R-2800-21 engine cylinder with wind-tunnel tests of a Pratt and Whitney R-2800-27 engine

Correlation of single-cylinder cooling tests of a Pratt and Whitney R-2800-21 engine cylinder with wind-tunnel tests of a Pratt and Whitney R-2800-27 engine

Date: December 1, 1943
Creator: Rollin, Vern G
Description: None
Contributing Partner: UNT Libraries Government Documents Department
A correlation of the effects of compression ratio and inlet-air temperature on the knock limits of aviation fuels in a CFR engine II

A correlation of the effects of compression ratio and inlet-air temperature on the knock limits of aviation fuels in a CFR engine II

Date: June 1, 1946
Creator: Evvard, John C
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Cylinder temperatures of two liquid-cooled aircraft cylinders for various engine and coolant conditions

Cylinder temperatures of two liquid-cooled aircraft cylinders for various engine and coolant conditions

Date: October 1, 1945
Creator: Bernardo, Everett
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Wind-tunnel investigation of a full-span retractable flap in combination with full-span plain and internally balanced ailerons on a tapered wing

Wind-tunnel investigation of a full-span retractable flap in combination with full-span plain and internally balanced ailerons on a tapered wing

Date: August 1, 1943
Creator: Fischel, Jack
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Tables of stiffness and carry-over factor for flat rectangular plates under compression

Tables of stiffness and carry-over factor for flat rectangular plates under compression

Date: November 1, 1943
Creator: Kroll, W D
Description: None
Contributing Partner: UNT Libraries Government Documents Department
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