Originally Posted by craig.roser
What would cause too far forward? I didn't build the plane. I'm the third owner. The plane flies great.
Heavy prop (e.g. constant speed, metal), battery in front, heavy battery (not LiPo), light paint job (not as much weight on tail), bigger engine, Smoke system in front baggage compartment rather than back baggage compartment, .... .
My CG was AT the front of the envelope. Wasn't really a big deal for anything in acro with exception of spin entry and snap rolls which both are a bit easier with the CG further back (but not impossible even at the front of the envelope). Stick pressures obviously get lighter on pull as you move the CG back so that's another reason to not be AT the front ... .
I put a CATO prop on, got a LiPO battery and put a smoke system in the back luggage compartment. Now I can adjust my CG by putting more or less smoke oil in.
So if you just getting started in acro I wouldn't worry and just have fun. If you don't get a clear break on spin entry and you really want to there are many ways to move the CG back.
Whatever you do though make sure it is properly secured... . 20lb at 9G is 180lb... .