Received the brass screws and bolts from Bolts.com today so decided to tackle mounting the two Dynon ADAHRS and the Vertical Power GADAHRS. Given that they are supposed to be mounted within 1 degree of all three axes I spent about a hlaf hour just measuring. To some degree (no pun intended) the brackets should be very close to level in pitch and roll axes so the only real issue I had was the yaw measurement. I think I am reasonably close and I'm not sure how to do better until the plane flies and it can be calibrated. I mounted the two Dynon ADAHRS one on top of the other so they should agree with each other...right or wrong. I drilled all the holes and mounted the Dynons with the brass hardware, double nutting for security since I was unable to locate any brass lock or star washers. I am a little concerned about the rigidity of the cross brackets they are mounted to but I think if I got into enough turbulence to affect it I would have to land anyway.
