Doesn't seem like much info on the APU anomaly:
Analysis shows that one temperature measurement exceeded a pre-defined limit and that the flight software correctly triggered a shut down
Sounds like the fix is changing the start up procedure such that it doesn't reach the temperature limit. It would be nice to know why it went outside what they deemed safe but I guess it is rocket science.
Because the minor diameter of the barrel is 5.56 mm and the major diameter is 5.69 mm. If the bullet were smaller than that then the propellant would blow past it. They didn't make a 'murican millimetre like they did with the imperial system.
PSI
0 100
┣━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┫
Dead Potentially survivable
Vs
Atm
0 100
┣━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┫
Dead Dead
Vs
kPa
0 100
┣━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┫
Dead Totally Fine
Plus it did land on the barge. Most of the debris should be there, though the remaining fuel would have mainly gone overboard. Probably the flight termination explosives also.
Tim Harford did a mini series on von Braun and the V2 on the Cautionary Tales podcast: https://timharford.com/2024/02/cautionary-tales-supersonic-nazi-vengeance-v2-rocket-part-1/
@Morphit
@feddit.uk