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SpaceX Dragon 2 capsule destroyed in abort motor ground test
JF Mezei wrote on Sat, 4 May 2019
18:45:28 -0400: fron: https://youtu.be/s6a9Ct9O_nY (NASA press conference on launch of cargo Dragon, they discussed Dragon 2 "anomaly". "just prior, before we wanted to fire the Super Draco, there was an anomaly and the vehicle was destroyed" "anomaly occured during activation of the Super Draco system". "we have no reason to believe tht there is an issue with the Super Draco themselves", "those have gone thorugh about 600 tests". I'm pretty sure several of us told you that right after the anomaly happened. The way I interpret the SpaceX spokesperson's words: -The engines are not at issue. You don't know that. "No reason to believe" does not mean "not". It just means that like the COPVs it's a lower probability. But we're not playing "guess the most probable thing". We're playing "what the **** went wrong so we can prevent it from happening again, regardless of how likely it was". -use of word "system" points to when they "booted" the system, not when they pressed the the big red button to get fuel to the engines. Right conclusion but wrong reason. Your key is 'activation', not 'system'. And that still doesn't guarantee it wasn't a combustion chamber failure. For example, you pressurize the propellant tanks and a throttle valve fails. That puts propellant under pressure in the combustion chamber. -- "Some people get lost in thought because it's such unfamiliar territory." --G. Behn |
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