What was the Pratt&Whitney engine that was not man rated at that time. The RL-10 ? They are talking Mach 20 and 200,000 fett so I am assuming a rocket engine.
Quote from: agman25 on 08/07/2009 05:15 PMWhat was the Pratt&Whitney engine that was not man rated at that time. The RL-10 ? They are talking Mach 20 and 200,000 fett so I am assuming a rocket engine.I doubt it was the RL-10, because the memo on the briefing of 26 April 1966 mentions that DDR&E assistant director John Kirk was concerned that P&W wouldn't be able to man-rate the engine within 31 months. Surely by the spring of 1966 the RL-10 was a well-known quantity.It's made clear that this is a rocket-boosted glider rather than a rocket-propelled airplane, which is listed as the next thing to be developed, to be followed in turn by a scramjet. On the whole, this seems like an attempt to resurrect Dyna-Soar, albeit on a somewhat smaller scale, three years after its death. And the scale isn't really that much different in that the speed--Mach 20-plus--is nearly orbital.To Blackstar: If you have any further "guilt" that needs to be "assuage," I'm sure we would all be only to happy to help! Thanks a lot.
It's difficult to believe that with all of this interest in such a vehicle over the last several decades, nothing has ever come of it!
Mulready's book about advanced engine development at Pratt and Whitney says that they designed and built a reusable staged combustion LOX/LH2 engine for some secret Air Force project, and used the knowledge from that project in their unsuccessful SSME bid. I don't have it with me so I can't look up the name of the engine, but it seems likely that this is the engine that is being discussed. I seem to recall it was around 200klb thrust, which at two engines a vehicle means that this would be pretty damn large for an air-dropped system.The use of the term "man-rate" is interesting.Mulready's book also has a mention of an impressive-sounding fabrication technology to make titanium sandwich structures with conventional steel-rolling technology.
A question if I may.I came across this interesting article in Janes:http://www.janes.com/defence/news/jidr/jidr000105_01_n.shtmlAfter reading this (and with our thread here in mind) I was wondering if it may be russian, overflights?