Apparatus and method for the reduction of drag

Details Apparatus and method for the reduction of drag Apparatus and method for the reduction of drag

B - Operations, Transporting

64

C

B64C 21/00 (2006.01) B64C 21/02 (2006.01) B64C 39/08 (2006.01) B64C 39/10 (2006.01)

Patent

CA 2426219

The present invention relates to an apparatus for reducing drag of an aircraft utilized in combination with an aircraft surface, where the local airflow has an upward momentum due to the free air stream being deflected upward by the aircraft surface. The apparatus comprises an ancillary airfoil having a cambered top surface, a leading edge and a trailing edge and a generally concave lower surface; mounting members for mounting the ancillary airfoil above the aircraft surface in a spaced apart manner and at a positive angle of attack with respect to the local airflow; and an expansion chamber formed between the lower surface of the ancillary airfoil and the aircraft surface. The expansion chamber is located where a distance between the lower surface of the ancillary airfoil and the aircraft surface gradually increases.

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