ORIGINAL: tggilkey
Woodie, mjfredrick, flyncajun and anybody else with Genesis experience:
Can you post your CG location relative to the LE at the root of the wings (to save my mathematically challenged brain from having to sort out the numbers in a formula)? My Genesis wings were from a different source and the wing tube might not be in the same location as what comes from CA. The numbers Woodie has and mjfredrick says are similar to his, are quite a bit forward from the tube than what mine used to be. I say used to be because I have not checked it since doing some repairs (to the fuselage in front of the wing) * spent way too much time trying to get engines to run reliably.
Measurements in relation to the LE at the root would be useful for me. Thanks!
Tom
CG relative to LE at root on my Genesis is 5 7/8" back.
I have made one other modification to the Genesis that helped mine a lot and it has nothing to do with CG at all. I always found the responsiveness of the Genesis rudder to be VERY soft at center and then get very touchy beyond about 1/2" throw either side of neutral. Using expo did not help since it made the center dead when I got it to the point where it wasn't touchy. On my Genesis, the rudder leading edge was much thinner than the fin TE, about 1/8" on both sides. The rudder is also pretty large in comparison to the fin. I assume this was a design technique to make the rudder less touchy. Anyway, I first removed about an inch from the TE of the rudder and that helped with the touchiness outside of neutral. But it was still very non-linear in feel. Next, I built a new rudder that had a LE that matched the fin TE and kept the reduced total rudder area. For me, it fixed the dead feeling at neutral and got rid of a lot of the touchiness outside neutral. Rudder has a much more linear feel for me.
Woodie