XM52 Smoke Generating Subsystem. The XM52 was a Research and Development project for generating smoke from a U.H-1D/U.H-1H "Huey". Atomized fog was produced by introducing oil into hot engine exhaust gasses. The system consisted of a 50 gal. self-sealing rubber oil tank, pipes, nozzles, pump, and control unit. For line drawings of the XM52 smoke generator, go to
http://tri.army.mil/LC/CS/csa/xm52sg.jpg