How to Convert a 2 Blade to a 3 or 4 Blade Propeller?

The conversion for a 3 and 4 bladed propeller is a simple tasked if you know what 2 bladed propeller you use on a given Engine or Motor. For example, on a three bladed propeller you would drop the diameter and keep the pitch. On a four bladed, you would drop the diameter and the pitch. For instance if you had a two bladed 24-10 propeller and you wanted a three bladed you would use a 22-10 and so on.

The performance on a 2 bladed verses a 3 bladed propeller is very little. A 3 or 4 bladed propeller will give you more thrust, and you will sacrifice a little speed. The big advantage to using a multi blade is that you have more ground clearance less noise factor.

3 & 4 BLADED CONVERSION CHART

Two Bladed	Three Bladed	Four Bladed
10-6	9-6
11-8	10-8	10-6
12-8	11-8	11-6
12-10	11-10	11-8
13-10	12-10	12-8
14-10	13-10	13-8
14-8	13-8	13-6
15-8	14-8	14-6
15-10	14-10	14-8
16-10	15-10	15-8
18-10	16-10	16-8
20-10	18-10	18-8
22-10	20-10	20-8