In article ,
Tamas Feher wrote:
BTW, X-prize has little to do with space. First the altitiude is a
little low, 100 km instead of 110 km...

100km is the international definition of the beginning of space, subscribed
to by essentially everyone except the US government.

and they only have 5% of orbital energy.

"Space" and "orbit" are two different things.
--
"Think outside the box -- the box isn't our friend." | Henry Spencer
-- George Herbert |