I decided to use the Parkzone T-28 as the initial plane for my APM. I picked it beacause it is a straight forward 4 channel foam plane that fits in my trunk assembled and it has a huge removable canopy. I am going to move the tail servos to the fuselage just ahead of the tail, install a seperate nose wheel steering servo under the nose, and move the battery forward. This will completely empty out the large area under the canopy for the electronics. I also cut the bottom of the canopy flush to increase the space.
The pictures are of a quick mock up to check the center of gravity before I do anything permanant. It looks like it is in the ballpark.
Another good feature is that somewhere I saw a replacement canopy with a camera on it, it looks like it would be easy to make also.
I like flying this plane and learned a lot while flying it. I am building a completely new plane for the APM, the old one has been through a lot! I am wondering if anybody else is using this or similar planes?
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I have used a few different motors, but with the autopilot I used an E-flight park 450 motor, because it seemed smooth, quiet, and efficient. I have always used a 3s 2200 mAh battery in the T-28.