At 09:26 PM 2/9/2014, you wrote: >I plan on putting the hinge point underneath the main spar, and >would expect deploying the flap would nose the plane down, requiring >nose up trim to compensate. That's how the flaps on N56ML work, at least. ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
The flaps cause a nose down pitching moment as they cause the center of lift to shift rearward. Don't know why my belly board, located at the aft spar location, causes a nose up pitch when deployed, slight but noticeable. Larry Flesner