How do you figure out prop pitch

[priwing]

I’m wondering if anyone knows of a way to find the pitch of a prop with every day tools

[retiredoz]

I checked this : http://propellerhub.com/measuring-pitch.html

By the time my eyes finished glazing over I decided I’d need a new definition of ‘everyday tools’ ,

[49hiawatha]

I am going to save this for a cold , snowing winter night to read…..

[Mumbles]

Take your prop down to a prop shop. They will have a special tool which measures the pitch and rake of the blades.

[priwing]

That’s a cool reading I’m going to have to print that out to go over. I love building tools.

[garry-in-michigan]

I center the prop on a turn table (Lazy Susan) and use a single rod. Starting at ⅔ the prop radius a quarter inch from the trailing edge of the blade. I measure the rod drop when turning the prop exactly 30 degrees. Multiply that measurement by 12 and you have the pitch.

[garry-in-michigan]

The rod holder is fastened from a 1" pipe flange base mouthed on a piece of plywood for stability. A PVC pipe adaptor is screwed in and PVC pipe goes up to an elbow with a short length of PVC with a ¼" vertical hole near the end. The rod I used was a quarter inch hard wood dowel pointed with a pencil sharpener.

For small props you can use 15 degrees, but then multiply by 24.

[priwing]

Awesome thanks Garry.

[Author]

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