BasedOnAir t1_itzeyij wrote on October 27, 2022 at 12:59 PM

Reply to comment by Googlemapsflow in TIL that flight recorders must be able to withstand an acceleration of 3400 g for 6.5 milliseconds and that this is roughly equivalent to an impact velocity of 270 knots (310 mph; 500 km/h). by IchBinKoloss

You didn’t get it wrong. OP didn’t mention that the spec says it must withstand 310mph to 0mph over a distance of 18 inches. Not instant-stop over zero distance.

The wiki explains this

Googlemapsflow t1_itznpjt wrote on October 27, 2022 at 2:05 PM

to stop over a time period of 6.5msec implies that it stops over a distance. I calculated velocity over the given 1.5ft distance and it was a different impact speed. The real answer is that they reported a max velocity when speed calcs are performed assuming a half sine wave impulse. Meyer explained it to me in a different comment