Noise!

Thought I was closing in on getting the AHRS squared away (plenty of difficulties on the way), but I attached it to the helicopter today and looked at the signal with the main rotor running (with the helicopter still on the ground).

Lots of noise. Can't tell what is electrical (tried shielding it; but the experiment wasn't very well controlled) and what's mechanical (i.e., vibrations transmitted to the sensors). So :(