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dsc46169.jpg

The white, spherical start tank. The start tank contains pressurized hydrogen gas (initially from a ground source, but is refilled during S-IVB engine operation to allow for engine restart) which is used to provide the initial spin on the turbine, bootstrapping the turbopumps.

 
J-2 Engine at Science Museum Oklahoma (formerly the Omniplex)
Time picture taken Wed Jul 30 15:24:08 2008
Location picture taken Open-Air Exhibit Gallery
Science Museum Oklahoma (formerly the Omniplex)
Oklahoma City, OK
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