Prop Chart

2-Cycle Engines 4-Cycle Engines
Engine SizeStarting
Propeller
Alternate
Propeller
Engine SizeStarting
Propeller
Alternate
Propeller
.0496x35-1/4x4,
5-1/2x4,
6-3-1/2,
6x4, 7x3
.20 - .219x69x5,10x5
097x47x3,
7x4-1/2
7x5
.4011x610x6,10x7
11x4,11x5
11x7,
11x7-1/2,
12x4,12x5
.158x48x5, 8x6,
9x4
.45 - .4811x610x6,10x7
10x8,11x7
11x7-1/2,
12x4,12x5
12x6
.19 - .259x48x5, 8x6,
9x5
.60 - .6512x611x7-1/2,
11x7-3/4,
11x8,12x8
13x5,13x6
14x5,14x6
.29 - .309x69x7,
9-1/2x6,
10x5
.8013x612x8,13x8
14x4,14x6
.35 - .3610x69x7, 10x5,
11x4
.9014x612x10,13x8
14x8,15x6
.4010x69x8, 11x5 1.2016x614x8,15x6
15x8,16x8
17x6,18x5
18x6
.4510x710x6,11x5,
11x6,12x4
1.6016x615x6,15x8
16x8,18x6
18x8,20x6
5011x610x8,11x7,
12x4,12x5
2.4018x1018x12,20x8
20x10
.60 - .6111x711x7-1/2,
11x7-3/4,
11-8,12x6
2.7020x818x10,18x12
.7012x611x8,12x8,
13x6,14x4
3.0020x1018x12,20x10
.78 - .8013x612x8,14x4,
14x5
Pitch:

Think of pitch in the same way you think of threads on a screw.
A pitch of 6 means in one revolution, a propeller should move forward 6 inches.
Generally, greater pitch yields faster cruising speeds; lesser pitch provides better climbing.
Starting Propellor sizes are mid range pitch props that should fly just about any plane designed for that size engine.
Use these first as in most cases they will be close to being the correct size.
Then use trial and error to try and fine tune the maximum performance from your ship by trying the alternate props.
If none work better stick with the recommended starting prop.

Watchouts:

Keep loose clothing, shirt sleeves, and other such items away from the prop and avoid carrying objects that can fall into the prop such as pens, screwdrivers, etc.
Be sure to keep the glow driver wire out of the prop path.
If a spinner is used, be certain that it's edges are not in contact with the propeller blades.

1.0816x615x8,18x5
.90 - .9114x613x8,15x6,
16x5
1.2016x816x10,18x5
18x6
1.5018x618x8,20x6
1.8018x818x10,20x6
20x8,22x6
2.0020x818x10,20x6
20x10,22x6

Engine Size Conversion Chart
Cubic Inches to Cubic Centimeters
CICC CICC
.049.8 .6110.0
.091.5 .8013.0
.152.5 .9114.9
.193.1 1.2020.0
.213.5 1.5025.0
.254.1 1.6026.2
.294.8 1.8030.0
.355.7 2.0032.8
.406.5 2.4032.8
.467.5 2.7044.3
.508.2 3.0049.2