Impact absorbing blade mounts for variable pitch blades

Details Impact absorbing blade mounts for variable pitch blades Impact absorbing blade mounts for variable pitch blades

F - Mech Eng,Light,Heat,Weapons

02

K

170/65

F02K 99/00 (2009.01) F04D 29/32 (2006.01)

Patent

CA 1045981

ABSTRACT OF THE DISCLOSURE A variable pitch blade and blade mount is provided which is suitable for propellers, fans and the like and which has improved impact resistance. The invention is particularly directed to composit fan blades and blade mounting arrangements wherein the blades are permitted to pivot relative to a turbine hub about an axis generally parallel to the center- line of the engine upon impact of a large foreign object, such as a bird. By thus providing for the pivoting of the blades upon impact, centrifugal force recovery becomes the principal energy absorbing mechanism and a blade having improved impact strength is obtained.

249913

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