SpaceX Iridium-3 Mission Launching Streaming

Re:SpaceX Iridium-3 Mission Launching Streaming by imglorp on Monday October 09, 2017 @08:58AM (#15433407)

Is it possibly intentional? Eg maybe they started burning at idle thrust after landing, to empty out the tanks instead of just venting them?

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Re:SpaceX Iridium-3 Mission Launching Streaming by arctor_bob on Monday October 09, 2017 @09:13AM (#15433474)

There's no "idle thrust" on Falcon 9 since even the lowest thrust is enough to lift the almost empty booster. You also don't want to completely run out of fuel because your engine will probably explode. This was just a residual fire.

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Re:SpaceX Iridium-3 Mission Launching Streaming by antsar on Monday October 09, 2017 @12:09PM (#15435069)

> You also don't want to completely run out of fuel because your engine will probably explode.

Can anyone suggest keywords/links about this? Sounds interesting.

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Re:SpaceX Iridium-3 Mission Launching Streaming by msl on Monday October 09, 2017 @12:27PM (#15435231)

One problem here would probably be turbopumps [1] running dry. These things run very close to their limits when fully stressed and would presumably run higher still if they no longer needed to pressurize anything.

The fuel is also used as a coolant [2] so you would not want to run out of fuel in the plumbing before you run out of propellants in the combustion chamber.

[1] https://en.wikipedia.org/wiki/Turbopump

[2] https://en.wikipedia.org/wiki/Merlin_(rocket_engine_family) (search "regeneratively cooled")

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Re:SpaceX Iridium-3 Mission Launching Streaming by the-dude on Monday October 09, 2017 @08:59AM (#15433409)

I am not a rocket scientist ( IANARS ? )

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