A Hybrid Composite Horizontal Stabilizer For The XH-2/CCR Flight Demonstrator Aircraft

A hybrid composite stabilizer, utilizing graphite and S glass epoxy laminae has been designed and fabricated. The stabilizer will be flown on the Circulation Control Rotor Flight Demonstrator Aircraft for the XH-2/CCR. This is a stiffer and lighter structure than the present component. The unique feature of this design is the box beam hollow spar that tapers in two dimensions from mid-span to tip. Details of design, fabrication and initial testing of the stabilizer are reported. Primary emphasis is on the manufacturing process and method for making a hollow monolithic structure by utilizing expandable composite mandrels which, upon final assembly cure, become inner walls of the structure.