RCU Forums - View Single Post - Crow Vs. Gyro to Stop UF Snaps
View Single Post
Old 11-09-2017, 08:50 AM
  #25  
BlueBus320
My Feedback: (57)
 
Join Date: Mar 2002
Location: Rockville Centre
Posts: 1,674
Received 3 Likes on 2 Posts
Default

Originally Posted by Doug Cronkhite
The two are just barely linked. Now.. to be completely accurate, there is a change in stall speed with CG change, but it's so small that I doubt you could detect it outside of a wind tunnel. What happens is.. As the CG changes forward the pitching moment of the wing increases, and more downforce is required to hold a given angle of attack. That change in downforce from the tail requires the wing to counteract the reduction in lift from the tail for level flight(yes, the tail does provide some lift), so yes, an increase in angle of attack is required. BUT, we're talking miniscule amounts here. For reference, a Cessna 172, at the most forward CG at 2400 pounds, compared to the most rearward CG allowed, changes the stall speed by 1 knot. One.
but pick an extreme nose heavy Cg & it won't even be able to rotate. Move it back inch by inch & eventually it will fly. That's all Cg induced.
Jay