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The Energia Strap-ons using the RD-170 rocket engine were indeed derived from a ballistic missile. And yes indeed it was capable of a number of flights before overhaul. Gubonov said thr RD-170 might have 40 flights before overhaul, and I believe him. Unlike our Shuttle engine the Energia main engine was most like the P&W RL-129 with 3,500 psi chamber pressure and 535,000 lb thrust that was fired 40 time before overhaul. Bob Davies, when at Aerojet presented a paper ar the IAF Amsterdam congress that document a Energia main engine that achieved 82 full flight sequences from launch, to space to return before it had to be overhauled.

[QUOTE="HyperTech, post: 105671, member: 401"] The Energia Strap-ons using the RD-170 rocket engine were indeed derived from a ballistic missile. And yes indeed it was capable of a number of flights before overhaul. Gubonov said thr RD-170 might have 40 flights before overhaul, and I believe him. Unlike our Shuttle engine the Energia main engine was most like the P&W RL-129 with 3,500 psi chamber pressure and 535,000 lb thrust that was fired 40 time before overhaul. Bob Davies, when at Aerojet presented a paper ar the IAF Amsterdam congress that document a Energia main engine that achieved 82 full flight sequences from launch, to space to return before it had to be overhauled. [/QUOTE]

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