> An engine could well be used which runs on the oxygen/hydrogen fuel and > compresses air (or its own water exhaust) for thruster purposes but burning > it directly in a rocket motor is far more efficient. > > > > Russell McMahon > OK, so it's a question of efficency, don't we have free electricity, from solar panels.... and so isn't it a question of the weight of the solar panel and the electric motor and the compressor, versus all that hydrozine? I yield to efficency,if the numbers add up.... -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body