Author Topic: Apollo 8  (Read 42113 times)

Offline Jim Davis

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Re: Apollo 8
« Reply #80 on: 04/30/2018 01:48 AM »
Putting reliability aside, turbopumps also increase the weight of the engine and weight limits on the Apollo missions were tight.

Turbopumps would indeed increase the weight of the engines but they would decrease the weight of the overall system since the propellant tanks would no longer have to withstand full combustion chamber pressure and more. The greater reliability of a pressure fed propulsion system is why such a system was chosen; the greater weight was accepted as the price for this greater reliability.