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S-II Common Bulkhead Insulation Gallery


The sign accompanying the insulation. It reads

S-II Bulkhead Insulation


To lighten the Saturn V's second stage, contractor North American Aviation did away with separate tanks for fuel and oxidizer. Instead, the stage had one tank divided by a common bulkhead — with the liquid hydrogen and liquid oxygen stored side by side. The problem: the liquids needed to be kept at vastly different temperatures.


North American insulated the S-II bulkhead with a fiberglass honeycomb core, sandwiched between aluminum sheets. The sample on display shows a welding technique called a "strip seal join," which was used to connect the pieces of aluminum bonded to the honeycomb.

Sign by the S-II Common Bulkhead Insulation at the U.S. Space and Rocket Center.
Time picture taken Sat Aug 27 10:37:36 2011
Location picture taken Saturn V Hall
Davidson Center for Space Exploration
U.S. Space & Rocket Center
Huntsville, AL
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