Rotor blade construction for circulation control aircraft

Details Rotor blade construction for circulation control aircraft Rotor blade construction for circulation control aircraft

1987-04-27

1988-09-13

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

With fluid passage in working member communicating with...

Air and watercraft propellers

416 20R, B64C 2108

Patent

active

047706074

ABSTRACT:
A circulation control aircraft rotor blade of advanced composite material having a spanwise Coanda surface 16 and a plurality of spanwise extending flexible panels 18 cooperating with the Coanda surface to define slots for the discharge of compressed air from a duct 14 within the blade with each panel having flexure means 34 associated with attaching means 24 and limiting means 38 for establishing a slot opening preload and a slot maximum opening and with limiting means 38 providing structural equilibrium and reduced bending moments in the inboard corners of the air duct.

REFERENCES:
patent: 3139936 (1964-07-01), Davidson et al.
patent: 3524711 (1968-05-01), Cheeseman et al.
patent: 3554664 (1971-01-01), Cheeseman et al.
patent: 3873233 (1975-03-01), Linck
patent: 3891163 (1975-06-01), Wilkerson et al.
patent: 4137008 (1979-01-01), Grant et al.
patent: 4626171 (1986-12-01), Carter et al.
Barnes, Kirkpatrick and McCoubrey, "Circulation Control Rotor Flight Demonstrator"--Aug. 1976.
Reader, Kirkpatrick and Williams, "Status Report on Advanced Development Program Utilizing Circulation Control Rotor Technology"--Sep. 13-15, 1978.

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