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 Decade: 1940-1949
 Year: 1944
 Collection: National Advisory Committee for Aeronautics Collection
Wind-tunnel tests of the 1/8-scale powered model of the Curtiss XBTC-2 airplane I : preliminary investigation of longitudinal stability

Wind-tunnel tests of the 1/8-scale powered model of the Curtiss XBTC-2 airplane I : preliminary investigation of longitudinal stability

Date: June 1, 1944
Creator: Wells, Evalyn G
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
A laboratory investigation of the icing characteristics of the Bendix-Stromberg carburetor model PD-12F5 with the Pratt and Whitney R-1830-C4 intermediate rear engine section

A laboratory investigation of the icing characteristics of the Bendix-Stromberg carburetor model PD-12F5 with the Pratt and Whitney R-1830-C4 intermediate rear engine section

Date: October 1, 1944
Creator: Essex, Henry A
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Application of spring tabs to elevator controls

Application of spring tabs to elevator controls

Date: October 1, 1944
Creator: Phillips, William H
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Fluid de-icing tests on a Chandler-Evans 1900 CPB-3 carburetor mounted on a Pratt & Whitney R-1830-C4 intermediate rear engine section

Fluid de-icing tests on a Chandler-Evans 1900 CPB-3 carburetor mounted on a Pratt & Whitney R-1830-C4 intermediate rear engine section

Date: October 1, 1944
Creator: Essex, Henry A
Description: None
Contributing Partner: UNT Libraries Government Documents Department
A Theoretical Investigation of Longitudinal Stability of Airplanes with Free Controls Including Effect of Friction in Control System

A Theoretical Investigation of Longitudinal Stability of Airplanes with Free Controls Including Effect of Friction in Control System

Date: January 1, 1944
Creator: Greenberg, Harry & Sternfield, Leonard
Description: The relation between the elevator hinge moment parameters and the control forces for changes in forward speed and in maneuvers is shown for several values of static stability and elevator mass balance. The stability of the short period oscillations is shown as a series of boundaries giving the limits of the stable regions in terms of the elevator hinge moment parameters. The effects of static stability, elevator moment of inertia, elevator mass unbalance, and airplane density are also considered. Dynamic instability is likely to occur if there is mass unbalance of the elevator control system combined with a small restoring tendency (high aerodynamic balance). This instability can be prevented by a rearrangement of the unbalancing weights which, however, involves an increase of the amount of weight necessary. It can also be prevented by the addition of viscous friction to the elevator control system provided the airplane center of gravity is not behind a certain critical position. For high values of the density parameter, which correspond to high altitudes of flight, the addition of moderate amounts of viscous friction may be destabilizing even when the airplane is statically stable. In this case, increasing the viscous friction makes the oscillation stable again. ...
Contributing Partner: UNT Libraries Government Documents Department
Tests of a thermal ice-prevention system for a wing leading-edge landing-light installation

Tests of a thermal ice-prevention system for a wing leading-edge landing-light installation

Date: December 11, 1944
Creator: Hillendahl, Wesley H
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Analysis of circular shell-supported frames

Analysis of circular shell-supported frames

Date: January 1, 1944
Creator: Combs, Henry; Mignot, J E & Ensrud, A F
Description: None
Contributing Partner: UNT Libraries Government Documents Department
On the plane potential flow past a symmetrical lattice of arbitrary airfoils

On the plane potential flow past a symmetrical lattice of arbitrary airfoils

Date: January 1, 1944
Creator: Garrick, I E
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Experiments on drag of revolving disks, cylinders and streamline rods at high speeds

Experiments on drag of revolving disks, cylinders and streamline rods at high speeds

Date: June 1, 1944
Creator: Regier, Arthur
Description: None
Contributing Partner: UNT Libraries Government Documents Department
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