| Prop Chart Recomendations For Two - Stroke Engines |
| Engine Size |
Starting Prop |
Alternate Propellors |
| 0.049 |
6x3 |
5.25x4, 5.5x4,
6x3.5, 6x4, 7x3 |
| 0.09 |
7x4 |
7x3,7x4.5,7x5 |
| 0.15 |
8x4 |
8x5,8x6,9x4 |
| .19 -
.25 |
9x4 |
8x5,8x6,9x5 |
| .20 -
.30 |
9x6 |
9x7,9.5x6,10x5 |
| .35 -
.36 |
10x6 |
9x7,10x5,11x4 |
| 0.4 |
10x6 |
9x8, 11x5 |
| 0.45 |
10x7 |
10x6,11x5,11x6,12x4 |
| 0.5 |
11x6 |
10x8,11x7,12x4,12x5 |
| .60 -
.61 |
11x7 |
11x7.5, 11x7.75,
11x8,12x6 |
| 0.7 |
12x6 |
11x8,12x8,13x6,14x4 |
| .78 -
.80 |
13x6 |
12x8,14x4,14x5 |
| .90 -
.91 |
14x6 |
13x8,15x6,16x5 |
| 1.08 |
16x6 |
15x8,18x5 |
| 1.2 |
16x8 |
16x10,18x5,18x6 |
| 1.5 |
18x6 |
18x8,20x6 |
| 1.8 |
18x8 |
18x10,20x6,20x8,22x6 |
| 2 |
20x8 |
18x10,20x6,20x10,22x6 |
| Prop
Chart For Four - Stroke Engines |
| Engine Size |
Starting Prop |
Alternate Propellers |
| .20 -
.21 |
9x6 |
9x5,10x5 |
| 0.4 |
11x6 |
10x6,10x7,11x4,11x5.11x7,11x7.5,12x4,12x5 |
| .45 -
.48 |
11x6 |
10x6,10x7,10x8,11x7,11x7.5,12x4,12x5,12x6 |
| .60 -
.65 |
12x6 |
11x7.5,11x7.75,11x8,12x8,13x5,13x6,14x5,14x6 |
| 0.8 |
13x6 |
12x8,13x8,14x4,14x6 |
| 0.9 |
14x6 |
13x6,14x8,15x6,16x6 |
| 1.2 |
16x6 |
14x8,15x6,15x8,16x8,17x6,18x5,18x6 |
| 1.6 |
18x6 |
15x6,15x8,16x8,18x6,18x8,20x6 |
| 2.4 |
18x10 |
18x12,20x8,20x10 |
| 2.7 |
20x8 |
18x10,18x12,20x10 |
| 3 |
20x10 |
18x12,20x10 |
Please note that this chart is only a recommendation. Please always consult your engine's instruction manual to see if it requires a different size. Always start with a smaller prop when breaking in your engine.
Please note that this chart was obtained from the Licking County Radio Control Club
