Western R/C Flyers Inc.

Prop Size Chart 

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Engine   -   Prop Size Engine   -   Prop Size


Two - Stroke Engines  

.049
5.25x4, 5.5x4, 6x3.5, 6x4, 7x3 6x3  

.09
7x3,7x4.5,7x5 7x4

.15
8x5,8x6,9x4 8x4

.19-.25
8x5,8x6,9x5 9x4

.20-.30
9x7,9.5x6,10x5 9x6

.35-.36
9x7,10x5,11x4 10x6  

.40
9x8, 11x5 10x6

.45
10x6,11x5,11x6,12x4 10x7

.50
10x8,11x7,12x4,12x5 11x6

.60-.61
11x7.5, 11x7.75, 11x8,12x6 11x7

.70
11x8,12x8,13x6,14x4 12x6

.80
12x8,14x4,14x5 13x6

.90-.91
13x8,15x6,16x5 14x6

1.08
15x8,18x5 16x6

1.20
16x10,18x5,18x6 16x8

1.50
18x8,20x6 18x6

1.80
18x10,20x6,20x8,22x6 18x8

2.00
18x10,20x6,20x10,22x6 20x8


Four - Stroke Engines

.20-.21
9x5,10x5 9x6

.40
10x6,10x7,11x4,11x5.11x7,11x7.5,
12x4,12x5 11x6

.45-.48
10x6,10x7,10x8,11x7,11x7.5,12x4,
12x5,12x6 11x6

.60-.65 
11x7.5,11x7.75,11x8,12x8,13x5,
13x6,14x5,14x6 12x6

.80
12x8,13x8,14x4,14x6 13x6

.90
13x6,14x8,15x6,16x6 14x6  

1.20
 14x8,15x6,15x8,16x8,17x6,18x5,18x6 16x6

1.60
15x6,15x8,16x8,18x6,18x8,20x6 18x6

2.40
18x12,20x8,20x10 18x10

2.70
18x10,18x12,20x10 20x8

3.00
18x12,20x10 20x10

Warning: This chart is to be used as a general guide only!

You Must ALWAYS refer to your engine manufacturer's

instruction sheet as to the recommended size props

and rpm ranges for your specific engine!

ALWAYS WEAR EYE PROTECTION !!!

 

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