Turbofan case and method of making

Abstract

A casing for a gas turbine includes a construction providing improved structural efficiency. Improved load paths and means for transmitting loads in the engine case are disclosed.

1 . A shaft bearing support apparatus for a gas turbine engine, the apparatus comprising a bearing support member, a stop apparatus and a stop surface, wherein the stop apparatus and stop surface are subject to relative deflection therebetween when a shaft supported by a bearing mounted to the bearing support member deflects in use, and wherein a clearance is provided between the stop apparatus and stop surface equal to a maximum desired magnitude of said relative deflection such that contact between the stop apparatus and the stop surface occurs when said maximum desired relative deflection occurs, the stop apparatus and the stop surface thereby being adapted to arrest deflection beyond said maximum desired relative deflection by reason of said contact.  
   
   
       2 - 5 . (canceled)