National Advisory Committee for Aeronautics (NACA) - 2 Matching Results

Search Results

open access

The effect of mass distribution on the lateral stability and control characteristics of an airplane as determined by tests of a model in the free-flight tunnel

The effects of mass distribution on lateral stability and control characteristics of an airplane have been determined by flight tests of a model in the NACA free-flight tunnel. In the investigation, the rolling and yawing moments of inertia were increased from normal values to values up to five times normal. For each moment-of-inertia condition, combinations of dihedral and vertical-tail area representing a variety of airplane configurations were tested. The results of the flight tests of the m… more

Date: July 20, 1943

Creator: Campbell, John P. & Seacord, Charles L., Jr.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Review of Flight Tests of NACA C and D Cowlings on the XP-42 Airplane

"Results of flight tests of the performance and cooling characteristics of three NACA D cowlings and of a conventional NACA D cowling on the XP-42 airplane are summarized and compared. The D cowling is, in general, characterized by the use of an annular inlet and diffuser section for the engine-cooling air. The D cowlings tested were a long-nose high-inlet-velocity cowling, a short-nose high-inlet-velocity cowling, and a short-nose low inlet-velocity cowling" (p. 371).

Date: April 20, 1943

Creator: Johnston, J. Ford