I am using an old (very good condition) OS .61 SE long stroke pattern engine with Macs tuned pipe. Using 10% fuel and 11x11 prop. Contrary to what I expected the plane was fastest when using the 11x11. I am getting 11,450 rpm static. If I want to increase max speed should I look for a higher rpm setting of prop/pipe?
What is the highest and recommended nitro percentage? I tried YS20/20 and lost 300rpm.
Thanks a lot,
Ed