Propeller Chart

Choose The Right Propeller
While all engines produce power the Propeller is essential to transmit this power. A more efficient propeller will transmit more power to the air. It would be fair to say that these recommended props are often much larger than those typically used in the USA but this helps significantly with noise reduction and therefore we will go with a larger prop. The engines will not bog down with these props, they just won't quite develop all the power they could. Though to be fair we do overpower anyway. Prop sizes are only slightly above US recommendations. If you field is noise sensitive (as many are) then head for one of the large sizes. These figures are merely estimates - do not take them as gospel. They are merely a rough guide to get you started.

Note: This Chart was Hijacked from the UK. Please note the disclaimer above!!!

 
2-Stroke Glow Engines
 
Engine Size
Ideal Prop Size
Propeller Size Range Ideal RPM Range
0.10
7x4
7x4~6, 8x4 14000~16000rpm
0.15
8x4
7x5~6, 8x4~6 14000~16000rpm
0.25
9x5
9x4~6, 10x4~5 12000~15000rpm
0.32-0.36
10x5
9x6~8, 10x5~6, 11x4~5 12000~15000rpm
0.40
11x5
10x6~8, 11x5~7, 12x5~6 11000~12000rpm
0.46
11x6
10x7~9, 11x6~8, 12x5~7 10000~12000rpm
0.53
11x7
10x8~10, 11x7~9, 12x6~8 10000~11000rpm
0.61
13x6
12x8~10, 13x6~7, 14x5~6 9500~11000rpm
0.75
13x7
12x9~11, 13x7~8, 14x6~7 9500~10500rpm
0.91-1.08
14x6
13x10~11, 14x6~8, 15x6~8 9000~10000rpm
1.20-1.35
16x8
15x8~10, 16x8~10, 17x8 8500~9500rpm
1.40-1.80
18x8
17x8~10, 18x8~10, 20x6~8 8000~9000rpm
2.10
20x10
20x10, 22x8 8000~8500rpm
 
4-Stroke Glow Engines
 
Engine Size
Ideal Prop Size
Propeller Size Range Ideal RPM Range
0.26-0.30
10x6
10x5~7, 11x4~5 10000~11000rpm
0.40-0.45
11x6
11x6~7, 12x5~6 10000~11000rpm
0.48-0.56
11x7
11x7~8, 12x6~7, 13x5~6 10000~11000rpm
0.63-0.72
12x7
12x7~9, 13x6~7 10000~11000rpm
0.80-0.91
14x7
13x8~11, 14x7~9, 15x5~7 10000~11000rpm
1.00-1.20*
14x8
14x7~8, 15x6~10, 16x6~8 9000~10000rpm
1.40-1.50**
16x8
16x8~12, 17x8~10, 18x6 8500~9500rpm
1.80-2.00
17x8
16x10~12, 17x8~10, 18x8 8000~9500rpm
2.40
20x8
18x10~12, 20x6~8 7500~8500rpm
2.70
20x10
20x8~12, 21x8~10 7500~8500rpm
3.00-3.20
21x10
20x10~12, 21x8~10, 22x8 7500~8500rpm
 
Gasoline Engines
 
Engine Size
Ideal Prop Size
Propeller Size Range Ideal RPM Range
1.40-1.80
16x8
16x8~10, 17x8~10, 18x8 8500~9500rpm
40cc
20x8
18x10~12, 19x10, 20x8~10 6500~7800rpm
45cc
20x10
20x10~12, 21x8~10, 22x8 6000~7500rpm
50cc
21x10
20x12, 21x10~12, 22x8~10 6000~7200rpm
60cc
22x10
22x10~12, 24x8~10, 26x8 6000~7200rpm
75cc
24x10
24x12, 26x10~12 6000~6800rpm
100cc
26x10
26x10~12, 28x10 6000~6500rpm
150cc
32x12
30x10~12, 32x10~12 5500~6000rpm
200cc
34x11
32x12~14, 34x10~12, 36x10 5000~6000rpm