On Tue, 31 Jul 2007 12:01:13 -0700, in a place far, far away, Eric
Chomko <pne.chomko@xxxxxxxxxxx> made the phosphor on my monitor glow
in such a way as to indicate that:
Anyway, please cite an analysis that shows that going "up out of the
atmosphere with a rocket, and then a gravity turn, again with a rocket"
provides the lowest cost solution.
There is a reason that every launch vehicle ever developed followed
such a trajectory. I'm not going to waste^H^H^H^H^Hspend my time
going digging up cites for you.
Yep, your word is all that is needed. No need for a citation.
LOL, somewhat arrogant a position he chose to take :)
Cheers, Einar
Yes, I meant it as deadpan (straight faced) humor. The irony of course
is that Rand DOES actually believe that his word is proof
Re: VTVL? ...atmosphere with a rocket, and then a gravity turn, again with a rocket" ... you moron.... (sci.space.policy)
Re: Scrapping Scram ... >> A rocket want's to get out of the atmosphere as fast as possible. ... >> A scramjet would accelerate linearly at about 25 km. ... You might be right about scram-jets or you might be wrong. ... (sci.space.policy)
Re: Performance needed for planetary visit ... If we assume availability of that atmosphere,... >Climbing out of the same gravity well without any refueling ...core rocket, the exhaust velocity is around 10km/s. ...Thrust from a solid core nuclear thermal ... (rec.arts.sf.science)
Re: airplanes and space flight ... One thing that I always wondered about space flight is why most ... The vertical rocket takeoff seems to use so much energy and does ... Orbital speed is something like Mach 27, but you can't do that in the earth's atmosphere; aside from the fuel it would take, you'd burn the spacecraft to a cinder. ... Having said that, your idea of using an airplane to lift the rocket to a higher altitude is a good one, and as someone else has pointed out, it's one that was used by Burt Rutan, in capturing the X-Prize. ... (sci.space.science)
Re: VTVL? ... stages, it's been remarked that when what you want to do is climb out of the atmosphere, a simple vertical takeoff rocket stage with no wings or airbreathing engines is the most efficient. ... Climbing out of the atmosphere is really a secondary goal. ... The problem with a vertical launch is that it imparts a velocity that is perpendicular to the one needed. ... So any rational launch design will seek to find the optimum path between the two launch strategies. ... (sci.space.policy)
