RCU Forums - View Single Post - Different rudder needed on different knife edge directions ?
Old 11-22-2009, 01:59 AM
  #13  
f3a05
 
Join Date: Mar 2005
Location: Saffron Walden, UNITED KINGDOM
Posts: 563
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Different rudder needed on different knife edge directions ?

The solution is to increase the incidence of the left stab while decreasing the incidence of the right stab an equal amount. The stab opposite the inputted rudder is dominant in yawed (knife edge) flight.
Fascinating!
I see that you have (added?) flow straighteners to some of your latest pattern planes.
From what you're saying, it should follow that rudder-to-elevator pitch coupling should be reduced by these devices?
I am playing with one on my Gaudius(which already has a very powerful rudder),and,in just a few flights so far, have noted the expected increase in powerbut also a change in rudder-elevator coupling.
It's gone from a slight up-mix requirement on both directions (JR figures,4% each way), to a similar down mix(approx 6% R,2%L) with the flow straightener.