Trailing edge device for an airfoil

Details Trailing edge device for an airfoil Trailing edge device for an airfoil

1984-12-18

1985-09-24

Blix, Trygve M.

Aeronautics and astronautics

Aircraft sustentation

Sustaining airfoils

244200, 244215, B64C 2300, B64C 2110

Patent

active

045428689

ABSTRACT:
The invention is a small wedge shaped flap (20) for attachment to or near the trailing edge (14) of a airfoil (10) which improves the coefficient of lift and reduces the coefficient of drag providing an overall increase in fuel ecomony at cruise conditions. In detail the wedge shaped flap (20) has a downward height (26) of between 0.5 percent to 1.5 percent of the chord (16) of the airfoil (10) and has an included angle (30) to the chord of between 15.degree. and 45.degree.. The wedge flap is preferably placed at distance (24) of between 0 to 1.0 percent of the chord (16) from the trailing edge (14).

REFERENCES:
patent: 2011902 (1935-08-01), Leigh
patent: 2800291 (1957-07-01), Stephans
patent: 2950879 (1960-08-01), Smith

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