we are considering using Arduino for our ROMOLOS project www.romolos.de
. It's a reentry capsule released in 100km altitude and re-entering earth atmosphere.
So the capsule will be exposed to a low (-60°C) and high (300°C) temperatures, low pressure (0.0001 bar and less) and high vibrations during start.
We'll do a shaker tests, that's for sure, but I couldn't find informations of the temperature and pressure ranges Arduino can handle.
The given values are for the capsule hull. Inside it won't be as high temperatured. It's designed for 0-10°C at the 100km peak, and for 40°C and 50° for a short time during re-entry.
Pressure will be important, because the capsule won't be sealed, so the board and electronics shouldn't degas.
And the Vibrations will be there as well, that's hard to predict.
We don't need a space-approval for Arduino, but we must have some further details where the limits are in respect to "never exposing" and "just exposing for some short times".
Best regards, Andreas