Hi

this is the problem with the hawks. I built a Carf Skygate hawk. I asked around and unfortunately was told to "dial in all you can" so I put 89mm on the flap and lost the hawk at the end of Maiden flight as the flap blanked the elevator and I had no time to recover. After that, I found the instruction from Skygate (not Carf) and that indicated a total of about 38mm for landing flap. So from what I learned, the amount of flap needed is minimal.

Behzad