A complete expulsion device was designed, fabricated, and tested in accordance with requirements specified by NASA to demonstrate the feasibility of using metallic bellows to expel liquid fluorine. Difficulties were experienced in obtaining leaktight welds at the bellows end terminals, but eventually three assemblies were successfully fabricted and cycle tested, one in LN2, two in LF2. The bellows performed well, except that they failed prematurely in LF2, apparently the result of small initiator cracks in the seam welds of the bellows.
