On the 30% heli mix the 15-10 is perfect for my conditions...but I'm hot desert at about 1200ft. It will get better at lower elevations and still be great.

The 14-10 is a little light loaded for the 30% nitro but that is fine...you are not going to hurt the motor running it in the high 9's. It will probably work better for you on a 15-10 at about 9300 with the 30% heli performance blend.

On only 20% nitro I suspect the 15-10 is a little heavy on load. Try a 15-8 APC. or the 14-10 due to the lower nitro. And yes it will be a little happier up over 9k

The best target rpm for the YS 110's is about 9000-9600 find a prop and a fuel that turns this for your conditions and the engine will be happy and making its best power.

If you are high elevation like Denver at 5000 or 6000ft try the 15-8 on the 30% nitro and you should be in the range.



Troy Newman
Team YS