Parametrically shaped leading edge flaps

Details Parametrically shaped leading edge flaps Parametrically shaped leading edge flaps

1974-02-11

1976-04-13

Blix, Trygve M.

Aeronautics and astronautics

Aircraft sustentation

Sustaining airfoils

244 42DB, B64C 350, B64C 928

Patent

active

039499561

ABSTRACT:
An airfoil is specified with a double slotted leading edge flap having two members and adapted to be used together with a multi-slotted trailing edge flap. The leading edge flap uses two slots for landing and one or no slots for take off. The front leading edge flap member has specific shape parameters and curvatures. The rear leading edge member defines a slot substantially downstream of the cruise leading edge. Ahead of the trailing edge flap slot, there is provided a special slot across the wing's surface in special cooperation with a spoiler. The airfoil surface between the downstream slot of the leading edge flap and the special slot near the trailing edge flap is short and with negligible camber. Special consideration is given to wing torsion, fuel volume, number of slots, and effect of varying airfoil thickness on flap geometric and aerodynamic parameters.

REFERENCES:
patent: 3126173 (1964-03-01), Alvarez-Calderon
patent: 3246335 (1966-04-01), Alvarez-Calderon
patent: 3371888 (1968-03-01), Alvarez-Calderon
patent: 3447761 (1969-06-01), Whitener et al.
patent: 3556439 (1971-01-01), Autry et al.
patent: 3638886 (1972-02-01), Zimmer

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