Looks like this might be it, any idea what the chutes are?
RocketCal says that atmospheric pressure at 0 feet is 14.7 PSI, 14.17 PSI at 1000', and 12.23 PSI at 5000'. Unless I screwed up the...
It can happen on almost any rocket HPR. I've seen it happen with a PML Explorer on an H motor (on a L1 cert unfortunately).
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