Kenneth Margolis

Frank S. Malvestuto

Percy J. Bobbitt

Theoretical Prediction of the Side Force on Stores Attached to Configurations Traveling at Supersonic Speeds

Robert L. Nelson

United States. National Advisory Committee for Aeronautics

Richard Hood

Eric Reissner

George R. Costello

Melivn E. Laverne

Arthur Kantrowitz

Harold I. Johnson

Warren A. Tucker

Leo Diesendruck

Aaron S. Boksenbom

Bertham J. Eisenstadt

Flight Investigation of the Effect of Various Vertical-tail Modifications on the Directional Stability and Control Characteristics of a Propeller-driven Fighter Airplane

Dorothy M. Hoover

Design curves are presented which permit rapid estimations of lift and pitching moment for given values of aspect ratio, taper ratio, Mach number, and leading-edge sweep.

Subsonic Leading Edges and Supersonic Trailing Edges

Supersonic Lift and Pitching Moment of Thin Sweptback Tapered Wings Produced by Constant Vertical Acceleration

Robert William Kamm

Summary: Tests of spin-recovery parachutes on six models of typical fighter and trainer airplanes were conducted in the Langley 20-foot free-spinning tunnel to obtain data for correlating model and full-scale results. Parachutes attached to the tail of the models, to the out wing tip (left wing tip for a right spin), to the inner wing tip, and to both wing tips were tested. The results indicated that parachutes of the same size and type were more effective as spin-recovery devices when they were attached to the outer wing tip in the spin than when they were attached to the tail. The diameter of the outer wing-tip parachute required for a 2-turn recovery by parachute action alone varied from 4 to 7 feet. Parachutes attached to the inner wing tip would not effect recovery. When parachutes attached to both wing tips were used for recovery, the parachute diameters required were of the same order as for tail parachutes. The diameter of the tail parachute required for a 2-turn recovery by parachute action alone varied from 6.5 to 12.5 feet for the airplane designs used.

Comparison of Tail and Wing-tip Spin-recovery Parachutes as Determined by Tests in the Langley 20-foot Free-spinning Tunnel

Frank S. Malvestuto

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