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.

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