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meyerpw t1_itt449u wrote

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

Your assumption is that the acceleration is constant over that time.

Typically. Specifications like this would be in a half sine wave of acceleration. Although other acceleration profiles are possible

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Googlemapsflow t1_itt4wor wrote

Thanks Meyer, that makes sense. A half sine wave averages about 0.63 of peak acceleration and 485mph x 0.63 gives right at 310mph. I'm open to literature on this if you have any recommendations

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meyerpw t1_itt6bin wrote

Mll standard 810 goes into a bit of detail on shock testing,. Although it is not specific to black boxes.

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