2 Stroke Engines:
Engine Size:
.049
.09
.15
.19
.20
.25
.30
.35
.36
.40
.45
.50
.60
.61
.70
.78
.80
.90
.91
1.08
1.20
1.50
1.80
2.00
Break-in Prop:
Running Min:
Running Max:
4 Stroke Engines:
Engine Size:
.20
.21
.40
.45
.48
.60
.65
.80
.90
1.20
1.60
2.40
2.70
3.00
Break-in Prop:
Running Min:
Running Max:
For Three Bladed Props Subract an Inch off of
these 2 bladed sizes, however keep the same pitch.
Prop Sizing Chart by the
Green Mountain RCers, Inc.