There is no balance problem with the Flip, but it does depend on what motor you are running.

With a 40/46 size motor you may find you need to move the battery pack over the tank ( with none pumped motors you will have to mount the tank in the forward position).

With a YS63 or Irvine 53 or OS 50 you will need to move the battery pack further back or add a small amount of lead.

I have a YS 63 and with the battery pack under the wheels mount and this had the C of G at 140mm from leading edge. This gave a VERY stable, but not too exciting plane. Aim for 150 to 155mm back from the leading edge, and you will find the Flip will be fantastic, but still keep some stability!! To get mine to 150mm back I have added 3/4oz of lead to the tail. Once I am happy with the flying I will reposition the battery pack and remove the lead.

I like the way mine flys at 150, but as I get more air time ( i have only had 1.5 hours to date) I may move it back. At 150 it is totally neutral trim upright or inverted.

I have fitted two Hitech HS5245's at the back driving each elevator half, and closed loop connection to the rudder driven by a Hitech HS 5945. The ailerons use the same servos as the rudder all powered by a 1300Mah MH pack.

You will need more aileron movement than the instructions say, but the elevator is pretty sensitive, and is worth trying before going to very high movements. Mine uses just a little more than standard and still loops/flips in its own length.

Hope this helps you


Peter