I want to mount a gopro on the bottom of a GP J3 Cub 40. I'm planning to fabricate a panel controlled by a servo that would let me control the pitch. So I can film straight ahead, straight down, or anything in between.

I'm sure that such a panel constitutes a huge control surface, and potentially as an air brake.

so I'm wondering if anybody has done something similar, and if so; how did it affect the handling characteristics of the plane?<br type="_moz" />