Hi all,

I recently bought a Harrier 3D. Love the plane but the powerplant - an OS 91FSII 4 stroke using a 15x4 prop (turns at about 9,000 rpm) just doesn't seem to be enough - it can hover but at full throttle and I'm not comfortable with that. I have tried a 16x4W prop but the OS will only turn that at 7,000 rpm. I have tried a 14x6 and 15x5 but neither of those worked well. For fuels I have tried powermaster 10%, 15% and 20% and have noticed little difference.

So my question is in two parts

1) Does anyone have any suggestions around the current powerplant/prop/fuel combinations.

2) For those that suggest I try another powerplant what would be your recommendations. I was thinking of getting a YS1.10 but they seem to be hard to come by. Does anyone have a 2 stroke running in this plane that they find works well? What about a Saito 1.00.

Any suggestions appreciated.

Ian