Cheap Realistic Space Flight

In article ,
Oren Tirosh wrote:
...(b) innovative engine designs with rather better
performance than conventional approaches,

For what definition of "performance"? Energy efficiency is already
fantastic in today's rockets.

Well, no, it's not all that terrific... but it is probably about as good
as it is going to get, aside from the question of altitude compensation.

Thrust/Weight? Performance in the atmosphere?

Yes, and some other things -- see previous posting.
--
MOST launched 30 June; first light, 29 July; 5arcsec | Henry Spencer
pointing, 10 Sept; first science, early Oct; all well. |