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19 votes
Accepted

Engine failure: how to detect?

Apollo-era engines had redundant THRUST OK chamber-pressure-actuated switches that toggled to ON at a certain value of the chamber pressure (for the F-1, it was 90% of nominal). 1-130. Engine ...
Organic Marble's user avatar
18 votes

Engine failure: how to detect?

Just take your accelerometer's reading and multiply it by the current mass estimate? That is not a good idea. I'll start with launch, where using sensed acceleration wouldn't work at all. Launch ...
David Hammen's user avatar
4 votes
Accepted

Logic sequencing: From fault detection to launch escape?

There was no escape system for shuttle so N/A there. See this Q&A Why not turn off the main engines while using the launch escape system on liquid fuelled engines? and especially the documents ...
Organic Marble's user avatar
1 vote
Accepted

Change in drag coefficient when Dragon flips over on launch escape?

NASA Technical Note TN D-4688 AERODYNAMIC STABILITY CHARACTERISTICS OF THE APOLLO COMMAND MODULE contains a wealth of aerodynamic coefficient data for the baseline and various proposed modifications ...
Organic Marble's user avatar

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