Accession Number : ADD000176

Title :   High/Low Aspect Ratio Dual-Mode Fin Design.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Jones,Daniel A

Report Date : 05 Feb 1974

Pagination or Media Count : 4

Abstract : The patent relates to a dual-mode fin design for gun-launched, rocket-assisted, guided projectiles in which, from a flush position against the body, the fins rotate radially at launch to deploy in the low aspect-ratio mode for stability during the supersonic fly-out phase with transition to the high aspect-ratio mode for the transonic terminal maneuvering phase. Deployment of the fins to high aspect-ratio mode is effected by shearing restraining pins which allow the fins to rotate rearwardly about pivot pins and under the air stream influence.

Descriptors :   *Guided projectiles, *Aerodynamic control surfaces, *Patents, Fins, Deployment, Aspect ratio, Aerodynamic stability, Terminal guidance

Subject Categories : Ammunition and Explosives

Distribution Statement : APPROVED FOR PUBLIC RELEASE