Aug 14 2009
Saturn V Stage II
Well, here we are again, another week has past and it is time for the second act in our Apollo Saturn V rocket, that is, this week we will examine the second stage of this mighty machine.
The second stage of the Saturn V rocket, also known as S-II, was built by North American Aviation at Seal Beach, California. This stage was fueled with liquid hydrogen and liquid oxygen. This stage had five J-2 engines and were arranged the same as the first stage, with the outer engines being able to move to control the direction of flight.
The second stage was 81 feet 7 inches tall and a diameter of 33 feet, which is identical to the first stage. The weight was 88,000 pounds dry and when fully fueled, it tilted the scales at 1.06 million pounds. Over 90 percent of the weight of this stage was in propellant, during testing, there were several structural failures due to the weight of the propellant in the tanks and not enough support. A redesign of the two tanks, allowing them to rest on top of each other with a honey comb resin sandwiched between two sheets of aluminum created a bulkhead between the two tanks, thus adding additional support.
Next up is the third stage of the Saturn V – join us next week as we continue our adventure.
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