Fortysix12
Registered User
RanchAero Grand Vista, Brooksville
In general it's a thumbs up from me. I have a Dynon D10A with both servos at 52lbs. The roll servo is located under the seat incorporating a control arm and lever which is attatched to the torque tube. The pitch servo is mounted under the rear baggage floor and utilized the capstain attatched to the elevator cable. The cub requires the 52lb'rs. so I recommend that you don't waste you time with installing anything smaller. As stated in earlier threads the Super Cub is a difficult airplane to fly well with any autopilot. Altitude diviations as a result of thermal tubulance should not be considered as an autopilot failer. Turbulance is difficult to manage for any autopilot in any airplane but it is noticably more difficult in the Cub. Smooth air operation is flawless. My servos have been installed for over a year now and 150 hours later I have to report that the Dynon Group has been fantastic with product support. There was probably less than 5 Super Cubs flying with an autopilot at the time I started testing. When I started evaluating and testing the operation for satisfactory autopilot control , establishing a set of operation standards as well as a base line was part of the challenge, is the the autopilot, is it the airplane, is it the installation. GPS nav and tracking is plus or minus 1 degree and very stable without any hunting. Perfect heading bug operation requires the remote magnetometer and the EFIS to be mounted in an instrument panel that is very close to 90 degrees in relation to the level flight attitude. My instrument panel is at 17 degrees which not optimal and has minor influences on two of the autopilots flight control modes. When the autopilot is in the heading mode the airplane hunts plus or minus 3 degrees and again this because the magnetometer is tilted with my panel. Historically the heading bug mode is the most stable of all Dynon EFIS modes but because of my panel tilt it is not. The other mode that is off slighly is perfect selected altitude preselect,meaning I overshoot or undershoot my altitude preselect by 20 feet. Not a big deal but it's not perfect for a 100% digital autopilot. So, if you are building an experimental Super Cub I recommend that you choose the Dynon EFIS as part of your instrumentation and spend the additional 1500 bucks for the servos and take full advantage of the Dynon autopilot,dollar for dollar I found it to be the best value. The weight penalty is around 8 pounds including brackets and mounting hardware. I average 250 hours a year and half of that time is flying out and back to the western United States. There is no substitute for great autopilot.
Jeffrey A Jones.
Jeffrey A Jones.
Last edited: