Scott Hersha
Well Known Member
I have a not quite new, to me, (Aug 2019) RV4, and I would like to add a 2 axis autopilot. I have GRT avionics installed, so I’m looking at their servos. Unfortunately, I haven’t been unable to find a bracket for my roll control Servo. I have researched and found numerous installations for this, and have concluded that mounting the Servo in the cockpit area is the best solution. The wingtip install seems a little too difficult, and less robust/serviceable. I’m considering the Servo mount under the seat area, but I have footwells, so moving it aft creates difficulties with access, but it’s doable. However, this type install requires a bracket for the roll torque tube - basically two half circle brackets that capture the torque tube and supply a connection to the autopilot control rod. I haven’t been able to find anyone that has this torque tube bracket. Stein doesn’t have it. I contacted TruTrak/Bendix/King and they sent me to Mid-Continent Avionics. They sent me to their “TruTrak Expert”. I had to leave a message, and he/she hasn’t gotten back to me. So, what I am seeking is someone that has one of these torque tube brackets, or knows where to get one. If I have to, I’ll fabricate my own, but it sure would be easier if someone here has one they don’t need. The bracket supporting the Servo is easy enough to make, but the round bracket that captures the round torque tube is a bit more challenging.
I would also consider a roll Servo attachment forward of the wing spar, as has been done on other RV4’s, and a couple Rockets, but not sure how this connects to the torque tube. This has been done before, but the posts are so old that the pictures are no longer available. If anyone has a picture of this installation, please forward it to me.
Thanks for your help/recommendations. This is the part of homebuilding that I really enjoy, but since it involves critical flight controls, I want to be safe and not do something that might be unsafe ( I understand the autopilot over center limitations).
I would also consider a roll Servo attachment forward of the wing spar, as has been done on other RV4’s, and a couple Rockets, but not sure how this connects to the torque tube. This has been done before, but the posts are so old that the pictures are no longer available. If anyone has a picture of this installation, please forward it to me.
Thanks for your help/recommendations. This is the part of homebuilding that I really enjoy, but since it involves critical flight controls, I want to be safe and not do something that might be unsafe ( I understand the autopilot over center limitations).