Actuated forebody strakes

Aeronautics and astronautics – Aircraft control

Patent

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Details

244 45A, 244 46, 244 90R, B64C 902, B64C 908

Patent

active

049173332

ABSTRACT:
Actuated forebody strakes provide yaw control at high angles of attack. In one embodiment, the strakes are axially slidable in the forebody to be deployed out of slots provided for the strakes in the forebody. In another embodiment, the strakes are pivotally connected at the tip of the strakes to pivot radially outwardly out of the slots provided in the forebody. In another embodiment, the forebody is provided with either a single strake or two strakes and the forebody is rotatable to vary the radial location of the strake or strakes. All embodiments achieve significant yaw control capability over a wide angle of attack and sideslip ranges.

REFERENCES:
patent: 1250033 (1917-12-01), Scroggs
patent: 2386915 (1945-10-01), Spitter
patent: 2743888 (1956-05-01), Lippisch
patent: 2924400 (1960-02-01), Ruget
patent: 2941752 (1960-06-01), Gluhareff
patent: 3170657 (1965-02-01), Riebe et al.
patent: 3884435 (1975-05-01), Croy et al.
patent: 4010920 (1977-03-01), Farner
patent: 4378922 (1983-04-01), Pierce
patent: 4786009 (1988-11-01), Rao et al.
Neilhouse, A. I. et al., "Status of Spin Research for Recent Airplane Designs" NASA TR R-57, 1960.
Chambers, J. R.: Anglin, E. L.; and Bowman, J. S., Jr.: Effects of a Pointed Nose on Spin Characteristics of a Fighter Airplane Model Including Correlation with Theoretical Calculations, NASA TN D-5921, Sep. 1970.
Rao, D. M.; Moskovitz, C.; and Murri, D. G.: Forebody Vortex Management for Yaw Control at High Angles of Attack, ICAS-86-2.5.2, Sep. 1986.

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