Reversible thrust ducted fan propulsion unit

Details Reversible thrust ducted fan propulsion unit Reversible thrust ducted fan propulsion unit

F - Mech Eng,Light,Heat,Weapons

02

K

60/83

F02K 3/02 (2006.01) F02K 1/66 (2006.01) F02K 1/72 (2006.01)

Patent

CA 1147973

-1- ABSTRACT OF DISCLOSURE REVERSIBLE THRUST DUCTED FAN PROPULSION UNIT Ducted fan propulsion unit for aircraft has a main duct 3 containing a reversible pitch fan 1 rearward of which is provided a flow splitter 13 dividing the main duct into radially outer and inner branch ducts 3A,3B, A radial passage 15 in the splitter connects the branch ducts and divides the splitter into front and rear parts 13A,13B. The part of the inner branch duct forward of the radial passage contains in array of stator vanes 12B and has outer and inner wall surfaces 3B1,3B2 both of progressively reducing diameter to urge the flow through that branch duct toward the inlet of a compressor 8 of yet smaller diameter. Stator vanes 12A, in the outer branch duct are arranged forward of the radial passage. The arrangement favours a relatively low axial length of the powerplant.

368310

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