I would love to know how they prevented flow separation when they fired a vacuum optimized engine at sea level! Normally the pressure at the end of a vacuum nozzle is so low that the ambient air pressure will separate the flame from the nozzle and destroy the engine! @elonmusk
I would love to know how they prevented flow separation when they fired a vacuum optimized engine at sea level! Normally the pressure at the end of a vacuum nozzle is so low that the ambient air pressure will separate the flame from the nozzle and destroy the engine! @elonmusk
@Erdayastronaut Raptor has a very high chamber pressure, which in turn allows for a large expansion ratio nozzle without flow separation at sea level
@Erdayastronaut Currently at ~270 bar, but working on upgrades to get it over 300 bar
@Erdayastronaut Got to 321 bar before RUD, but cause may be due to oxygen inlet pressure too low, rather than engine issues