Prop Pitch Checker

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There are all kinds of good tools available to make sure that all your prop blades are at the same pitch. Unfortunately, most all of them are expensive. Except this one.

The black and stainless gizmo is from Lowes, costs about $6. The double bubble is from Big Lots, costs $1. The double bubble is glued to a rusty piece of plumbing strap with a 90 degree bend in it, and uses an old AN4 bolt and wingnut, cost is nil. Put them together with the bolt just tight enough to keep things in place but still adjustable, hold them up against the flat side of the prop and they ought to look like this:

If your prop has a square tip, then it's really easy. Hold the flat plastic part against the bottom of the prop, square with the end, and raise or lower the prop until the prop blade is level. Now twist the strap until the other bubble is just touching one of it's two lines. Rotate the prop and try it on the next blade, they ought to match.

If not, you know what to do.

Fix it.

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