On 9/10/2010 10:50 AM, wrote:
Yesterday I was reading about the Rocket Propulsion Establishment's
ideas for a lox/ammonia motor back in th early 50s. Does anyone know
if a lox/ammonia motor other than the XLR 99 was actually made
anywhere?

I checked over on Encyclopedia Astronautica, and the only other one than
the XLR-99 was the LR-30: http://www.astronautix.com/props/loxmonia.htm

Pat