alt Hacker NewsApparently the booster signaled it didn't have enough fuel to risk it. Either because it consumed more then expected on the way up, or a measurement error potentially.
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bavell • yesterday at 9:29 PM
I heard somewhere the engine efficiency is still somewhat variable so they burned more fuel than anticipated.
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At the last moment the exhaust turned green. That's consistent with the fuel running out, the engines running oxygen rich, and subsequently "engine rich". So I would put my money on actually running out vs a measurement error.