Hello,

I am not sure if any one can help, but I really need some comments on my KMP GEE BEE with the GMS 1.20 engine....
I just bulit it up, have no idea what size of prop to use, the owner of the hobby shop told me to use 15 x 13, but according
to the instruction manual of this engine I have , the range is within 14x 8 ~ 16 x6..... and I just learned from the introduction paper
of my friend's GMS .47 , it says GMS1.20 uses 16x10 for sports,16x8: for racing, 18x5, 18x6 for scale ??!!
Does anyone have the experience on this engine with a scale plane like Gee Bee ??
Thanks...........