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Sep 24, 2014, 02:23 AM
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Falcon 9 secrets

Though SpaceX never revealed any detailed diagrams of Falcon 9, they did reveal 1 low resolution diagram which was captured in a blog in 2008.

So the video was the LOX tank. The spheres in frame were carbon fiber helium tanks used to pressurize the LOX tank. The temperature in there was −297.33F. Helium liquifies at -452F, so the spheres would still work when submerged. The fuel is presumably pressurized with exhaust.

All of the stages use common bulkheads between fuel & oxidizer. There's nothing on the 1st stage, no public displays where you can see the plumbing up close, no diagrams.
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Sep 24, 2014, 06:15 AM
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Ah LOX instead of kerosene... I wonder how they keep it from flashing to gas quickly but, it works, obviously. The outside of Saturn and even Shuttle would frost up and add extra weight if they sat on the pad too long.

I work with liquid helium at times. When venting the cold gas, oxygen collects on the vent pipes and drips off. Back in the day when smoking at work was OK, they guys that did would put a lit match under the drip and watch it flare.

Another reason to ban smoking at work.


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