Vortex-lift roll-control device

Details Vortex-lift roll-control device Vortex-lift roll-control device

1977-03-21

1979-01-02

Barefoot, Galen L.

Aeronautics and astronautics

Aircraft control

Rudders and empennage

244218, 244 46, B64C 338, B64C 508

Patent

active

041323750

ABSTRACT:
A wing, for aircraft of cropped, arrow-type planform with thin leading and side edges, having a pivotable tip to alter the crop angle of the wing during flight. Increasing the crop angle causes the wing side edge to become a trailing edge which reduces the strength of the side edge vortex flow. Decreasing the crop angle causes opposite results, in particular the side edge is now a leading edge and can generate a leading edge vortex flow. The wing constitutes a roll control device for aircraft of the stated design particularly effective at higher angles of attack.

REFERENCES:
patent: 1982242 (1934-11-01), Bellanca
patent: 2222997 (1940-11-01), Ballanca et al.
patent: 3273828 (1966-09-01), James
patent: 3493197 (1970-02-01), Spearman
patent: 3497163 (1970-02-01), Wakefield
patent: 3599904 (1971-08-01), Condit

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