Fan Hub Frame for Double Outlet Guide Vane

Abstract

A fan hub frame comprises a circular hub having an opening extending axially wherein an engine core is capable of being positioned, the circular hub having a radially outer surface, the radial outer surface having a plurality of cradles, each of the cradles having a lower surface and fillets disposed between the lower surface and upwardly extending sidewalls, the cradles capable of receiving a double outlet guide vane.

What is claimed is: 
     
         1 . A fan hub frame, comprising:
 a circular hub having an opening extending axially wherein an engine core is capable of being positioned;   said circular hub having a radially outer surface, said radial outer surface having a plurality of cradles;   each of said cradles having a lower surface and fillets disposed between said lower surface and upwardly extending sidewalls;   said cradles capable of receiving a double outlet guide vane.   
     
     
         2 . The fan hub frame of  claim 1  further comprising a plurality of apertures in said cradle for connection with said double outlet guide vane. 
     
     
         3 . The fan hub frame of  claim 2  wherein said double outlet guide vane extends from said circular hub toward a fan case. 
     
     
         4 . The fan hub frame of  claim 1  further comprising a flowpath surface on circumferential sides of said cradle. 
     
     
         5 . The fan hub frame of  claim 1  wherein said flowpath surface is curved from a forward toward an aft end of said hub frame. 
     
     
         6 . The fan hub frame of  claim 1  further wherein said cradles are spaced circumferentially about said radially outer surface. 
     
     
         7 . The fan hub frame of  claim 1 , said fan hub frame transmitting load through said cradles and double outlet guide vanes to engine mounts. 
     
     
         8 . A fan hub frame, comprising:
 a circular hub having a radially outer surface and a radially inner opening wherein a propulsor may be positioned;   a plurality of cradles circumferentially spaced along said radially outer surface of said circular hub;   each of said plurality of cradles defined by fillets capable of receiving a double outlet guide vane;   a plurality of fastener apertures extending in a radial direction through said cradles.   
     
     
         9 . The fan hub frame of  claim 8 , said cradles being curved along the axial direction from a forward to rearward end of said cradles. 
     
     
         10 . The fan hub frame of  claim 8 , said fillets being curved along the axial direction between axial forward and rearward ends.