Your airplane is in the weight range that could use either the 110 or 140. Remember that the 140 will need more fuel, vibrate more than a 110 and weighs more initially.

I believe the 110 running Coolpower 30% heli fuel would work ok, but by the time it is rigged up, you're looking at 10.5+ pounds. If you want great hovering, the 140 is your choice.

Good Flying!