Carl Froehlich
Well Known Member
All,
Pushing 10 hours on N8PH. I note that on landing I'm using a lot less nose up trim than I did on the RV-8A. My solo CG is at 80.4" (CG limit is 78.7" to 86.82").
On today's flight I took a photo of the elevators in level flight, again solo:
As you can see the trailing edge is deflected down, indicating needed nose down trim (the elevators are adding lift).
As the CG is well forward, I assume the HS rigging is off and the HS is creating too much downward force. I installed the spacer under the HS forward spar per the plan. On the 8A I had a similar (but less significant) issue and resolved it by adding an additional 0.040" spacer under the forward HS spar.
My question - what have others experienced and what actions did you take?
I'm setting up for the test phase where I load the plane to the aft CG limit but at this point I'm concerned that I'll run out of nose up trim long before I get close to the aft CG limit.
Carl
Pushing 10 hours on N8PH. I note that on landing I'm using a lot less nose up trim than I did on the RV-8A. My solo CG is at 80.4" (CG limit is 78.7" to 86.82").
On today's flight I took a photo of the elevators in level flight, again solo:
As you can see the trailing edge is deflected down, indicating needed nose down trim (the elevators are adding lift).
As the CG is well forward, I assume the HS rigging is off and the HS is creating too much downward force. I installed the spacer under the HS forward spar per the plan. On the 8A I had a similar (but less significant) issue and resolved it by adding an additional 0.040" spacer under the forward HS spar.
My question - what have others experienced and what actions did you take?
I'm setting up for the test phase where I load the plane to the aft CG limit but at this point I'm concerned that I'll run out of nose up trim long before I get close to the aft CG limit.
Carl