Musk Reveals Cause of Starship SN11 Crash Written 6 April 2021

SPACE reports that SpaceX CEO Elon Musk said Monday that the Starship SN11 prototype failed to land in the March 30 test flight because “a (relatively) small CH4 leak led to fire on engine 2 & fried part of avionics, causing hard start attempting landing burn in CH4 turbopump. This is getting fixed 6 ways to Sunday.” A “‘hard start’ refers to ignition when there’s too much fuel in the combustion chamber and the pressure is therefore too high.” SpaceX “has already built the next Starship prototype, known as SN15, and it should take to the skies soon.” 
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