Originally Posted by
megan
The Northwest Boeing 720 accident I mentioned earlier they reached -2.8
Actually the CAB accident report said that the negative acceleration increased to a
mean value of about - 2.8 g so the peak before the aircraft broke up may have been even higher.
https://en.wikisource.org/w/index.ph...705.pdf&page=4
Here are FDR plots from NW705 as published in the CAB report:
Looking at the plots, maybe the -2.8 g number came from the average of the last two data points on the coarse foil technology FDR record.