Crisp, clean book with no names or writing. Tightly bound. Only faults are spine crease and sunning to paper over spine. Illustrated throughout with technical drawings and large black and white photographs. This is a contractor's report prepared for NASA by Pratt and Whitney Aircraft Division of United Aircraft Corporation to describe the work they conducted from 1965-67. Report describes the analytical, design, fabrication and test work on an axial-flow turbine-compressor and turbo-alternator incoporating flight-type oil-lubricated rolling-element bearings as candidate turbomachinery for a Brayton cycle space powerplant.. 275 pages. Hard to find.