RC Model Airplane Propeller Conversion Table
2 Blade | 3 Blade | 4 Blade |
10 x 6 | 9 x 6 | - |
11 x 8 | 10 x 8 | 10 x 6 |
12 x 8 | 11 x 8 | 11 x 6 |
12 x 10 | 11 x 10 | 11 x 8 |
13 x 10 | 12 x 10 | 12 x 8 |
14 x 10 | 13 x 10 | 13 x 8 |
14 x 8 | 13 x 8 | 13 x 6 |
15 x 8 | 14 x 8 | 14 x 6 |
15 x 10 | 14 x 10 | 14 x 8 |
16 x 10 | 15 x 10 | 15 x 8 |
18 x 10 | 16 x 10 | 16 x 8 |
20 x 10 | 18 x 10 | 18 x 8 |
22 x 10 | 20 x 10 | 20 x 8 |
25 x 10 | 23 x 10 | 23 x 8 |
26 x 10 | 24 x 12 | 24 x 10 |
Explaination:
To convert from 2-blades to 3-blades, as a general rule, you'll want to DECREASE the propeller diameter by 1 inch and then KEEP the same pitch. To convert from a 3-blades to a 4-blades, you'll want to KEEP the same diameter and DESCREASE the pitch by 1 to 2 inch.