Re: Dyna-Soar question



Doug... wrote:


I'll remind y'all that John Young took manual control over STS-1 when he and Crippen watched the stagnation point shift off the nose and climb towards the windows (*) under the obviously-less-than-perfect automatic entry program. So while an automated navigation and flight control system would obviously have been useful (and possibly necessary for precision flying) on Dyna-Soar, they would almost have to have some manual back-up capability, during both launch and entry. Because if the hypersonic gliding regime was understood imperfectly enough in 1981 that Young was forced to go to manual control during the shuttle's first entry, I can't imagine that *any* automated guidance system could have achieved a successful Dyna-Soar entry in 1965.



But the way Thompson states it, the thing is going to fly on manual all the way up as its normal method of operation; which seems to be unnecessary to me. I can see a combined automatic/manual system for the reentry and landing, especially for the later parts of the landing when the pilot can bleed off any excess energy he has on the way to the landing site; but I wouldn't want to be the first person to try a manual reentry, because I think there's a good chance you could easily overshoot or undershoot your landing site by a few hundred miles.

Pat
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