RE: 12 6-10 prop. What pitch is it?
It's rare these days that anyone actually uses a wood propeller. And that's too bad, because for a varity of reasons, wood props are much better than plastic, and worse for other reasons.
The benefits? less gyroscopic effects when you are rapidly changing direction of the model, like snap rolls, etc so your engine's bearing last longer and the airplane handles better. The throttle response is usually much quicker due to the lower rotating mass. The break when they hit the ground, so the loads on the engine are lower.
Downside? Really much higher costs to manufacture. Plastic, you just mold and eject. Wood props take about 20 steps, and require a bit of hand work. Consider that you take a plank of Maple of the correct thickness (measured in quarters or fourth's). Typical for a 40 sized prop would be 4/4 or 5/4 for the width of the blade. So what you have to do:
1.) Cut the plank to length for the prop diameter
2.) Rip the plank to a block that holds three blanks (3 typical), thickness depends on pitch
3.) Drill the 1/4 shaft hole
4.) Shape 1/2 of the blade outline
5.) Shape the second side of the blade outline - maintain .003 blade to blade, top to bottom
6.) Rip the block to independent propeller blanks, thickness depends on the pitch
7.) Shape the first blade back side to the pitch curve desired (flat side of blade)
8.) Shape the second blade back side......
9.) Shape the front side of the first blade (curved front side)
10.) Shape the second blade.....
11.) Drum sand the flat side of the blades
12.) Airbag drum sand the curved side of the blades
13.) Sanding sealer soak props
14.) Hand sand blades after sanding sealer
15.) Add prop markings with size on one blade, brand on the other with stamp
16.) Paint with clear fuel-proof finish
17.) Second coat with finish
18.) Bag props, 12 to a bag
19.) Fill orders to distributers.
20.) Maintain equipment, sharpen carbide cutters, develop new products, deal with government regulations, OSA, EPA, IRS, etc.
21.) Unload 100,000 lbs of maple from a rail car