Aeronautics and astronautics – Missile stabilization or trajectory control – Externally mounted stabilizing appendage
Patent
1990-01-24
1991-07-09
Carone, Michael J.
Aeronautics and astronautics
Missile stabilization or trajectory control
Externally mounted stabilizing appendage
244 1TD, 244 14, F42B 1014
Patent
active
050297732
ABSTRACT:
The invention extends the operational envelope of towed bodies at high altitudes and at high dynamic pressures. It features fins with large span/chord ratios, compactly stowed along the body surface, pivotally swept back with their chord broadside to the airstream. These fins generate high drag forces and large stabilizing and damping moments, even at supersonic speeds. Sweepback angles, controlled by elastic restraints, increase as fin loads increase. This minimizes variations in cable tension, even in maneuvers. Fin drag forces can also extend telescopic body elements. Fin settings can also generate vertical or lateral forces to bias decoy position.
REFERENCES:
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patent: 3492011 (1970-02-01), Adams
patent: 3695177 (1972-10-01), Chakoian et al.
patent: 3857338 (1974-12-01), Bucklish
patent: 4624424 (1986-11-01), Pinson
patent: 4852455 (1989-08-01), Brum
Hoerner, S. F., "Fluid Dynamic Drag," published by the author, 1965.
Philipps, William H., "Theoretical Analysis of Oscillations of a Tow Cable", N.A.C.A. T.N. 1796, 1949.
Carroll, D., "Parametric Design and Analyses of Target Tow Lines," NADC Report 74151-30 AO #786 695.
Matuk, "Flight Tests of Tow Wire Forces While Flying a Race Track Pattern," A.I.A.A. Journal of Aircraft, vol. 20, No. 7, Jul. 1983, pp. 623-626.
Carone Michael J.
Grumman Aerospace Corporation
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