Increasing lift on helicopter rotor blades and airplane...

Details Increasing lift on helicopter rotor blades and airplane... Increasing lift on helicopter rotor blades and airplane...

B - Operations, Transporting

64

C

B64C 11/46 (2006.01) B64C 11/00 (2006.01) B64C 27/10 (2006.01) B64C 27/20 (2006.01)

Patent

CA 2075752

24 ABSTRACT A rotary airscrew having a central hub with coaxial first and second counter-rotating drive shafts, a first set of a plurality of non-lift blades connected to the first drive shaft for rotation to be rotated for moving air therewith, a second set of a plurality of primary airfoil blades connected to the second drive shaft, to be rotated counter to the rotation direction of the plurality of non-lift blades, and spaced apart from the non-lift blades with a small clearance distance to allow non-contacting counter-rotation, and a ring for supporting the first and second sets of blades with a small clearance distance between the ends as they are rotated.

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