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| Starting Propellor sizes are mid range pitch props that should fly
just about any plane designed for that size engine. Use these first as in most cases
they will be close to being the correct size. Then use trial and error to try and fne tune
the maximum performance from your model by trying to alternate props. If none work better
stick with the recommended starting prop. |
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Four Stroke Engines
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| Alternate Propellors |
Starting Prop. |
Engine Size |
| 9x5, 10x5 |
9x6 |
.20 - .21 |
| 10x6, 10x7,11x5, 11x7, 11x7.5, 12x4, 12x5 |
11x6 |
.40 |
| 10x6, 10x6, 10x8, 11x7, 11x7.5, 12x4, 12x5 |
11x6 |
.45 - .48 |
| 11x7, 11x7.5, 11x8, 12x8, 13x5, 13x6, 14x5, 14x6 |
12x6 |
.60 - .65 |
| 12x8, 13x8, 14x4, 14x6 |
13x6 |
.80 |
| 13x6, 14x8, 15x6, 16x8, 17x6, 18x5, 18x6 |
14x6 |
.90 |
| 14x6, 15x86, 15x8, 16x8, 17x6, 18x5, 18x6 |
16x6 |
1.20 |
| 15x6, 15x8, 16x8, 18x6, 20x6 |
18x6 |
1.60 |
| 18x12, 20x8, 20x10 |
18x10 |
2.40 |
| 18x10, 18x12, 20x10 |
20x8 |
2.70 |
| 18x12, 20x10 |
20x10 |
3.00 |
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Two - Stroke Engines |
| Alternate Propellors |
Starting Prop. |
Engine Size |
| 5.25x4, 5,.5x4, 6x3.5, 6x4, 7x3 |
6x3 |
.049 |
| 7x3, 7x4.5, 7x5 |
7x4 |
.09 |
| 8x5, 8x6, 9x4 |
8x4 |
.15 |
| 8x5, 8x6, 9x5 |
9x4 |
.19 - .25 |
| 9x7, 9.5x6, 10x5 |
9x6 |
.20 - .30 |
| 9x7, 10x5, 11x4 |
10x6 |
.35 - .36 |
| 9x8, 11x5 |
10x6 |
.40 |
| 10x6, 11x5, 11x6, 12x4 |
10x7 |
.45 |
| 10x8, 11x7, 12x4, 12x5 |
11x6 |
.50 |
| 11x7.5, 11x7.75, 11x8, 12x6 |
11x7 |
.60 - .61 |
| 11x8, 12x8, 13x6, 14x4 |
12x6 |
.70 |
| 12x8, 14x4, 14x5 |
13x6 |
.78 - .80 |
| 13x8, 15x6, 16x5 |
14x6 |
.90 -.91 |
| 15x8, 18x5 |
16x6 |
1.08 |
| 16x10, 18x5, 18x6 |
16x8 |
1.20 |
| 18x8, 20x6 |
18x6 |
1.50 |
| 18x10, 20x6, 20x10, 22x6 |
18x8 |
1.80 |
| 18x10, 20x6, 20x10, 22x6 |
20x8 |
2,00 |
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