NASA testing vintage engine from Apollo 11 rocket

Engine No. F-6049 didn't fit properly on the Apollo 11 rocket, but it is invaluable now as a testing tool. Coates said a total of 85 F-1 engines were used on 17 Apollo flights without a single failure.

About a dozen F-1 engines remain in Huntsville, home of NASA's main propulsion center, and others are located elsewhere. Most are on display; Case said engineers used engine No. F-6049 for the tests because it was the most complete.

"It is really an excellent booster," he said. 'The guys in Apollo had it right.'

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