RE: 1/5 Pepsi Chipmunk - Build
Hi Redrata,
I don't think you need that powerful servos for the ailerons. I am using 5.5Kg servos for the ailerons and 645MG for rudder and elevators.
5645 are digital servos?
You will obviously get excellent response and accuracy from them in this application but they are a bit on the expensive side.
Good luck with your build
Ari