I appreciate a lot your time, patience and expertise...
You, as i tell you some time ago, are one of the most awesome 3d profile flyers out there...
McDDD wrote:I can understand wanting to use a glow engine instead of E-power. I feel the same way. There is something about the sound of the engine and the smell of the exhaust that adds to the enjoyment of flying that the electric planes simply can't match.
If maximum 3D performance is your goal, then electric power is really your only choice at 8700 feet.......period.
If glow power is your goal, and you are willing to settle for less than maximum 3D performance, then a 55AX or a YS 70 are your two best options. You should still have enough power for 3D flying, but the plane will probably feel underpowered most of the time. The 65AX will be more powerful, but the extra weight of that engine will kill the 3D flying capabilities of the plane itself.