I read that you used one time an APC 18 X10 on this engine.
You mentioned RPM around 6900!
what kind of static trust did you get out of this setup.
My plane is around 9KG, and my current setup is generating around 6Kg trust.
I can fy with it but need a long start run.
I saw on data sheet APC 18 X 10 that static trust at 6000RPM is something about 10Kg???