The standard way to measure pitch for ground adjustable props is on the rear side, at the tip. It's measured in degrees. It's really just a reference number, and wouldn't match the effective pitch of the prop due to the twist that props have. The logs said it was 13 degrees when I got it, and that's what I measured as well, so I have to believe we were both measuring it the same way.How are you measuring the pitch? Propeller pitch is measured in inches, not degrees. The angle in degrees varies along the length of the blade.
Warp drive propellers links a static thrust calculator on their page. It uses degrees and distance from the propshaft to measuring point. No doubt it is specific to their props. Unfortunately the link is broken at this time.How are you measuring the pitch? Propeller pitch is measured in inches, not degrees. The angle in degrees varies along the length of the blade.
==================Thanks, but I'm not looking for any theoretical numbers. The goal is to find someone actually running an F-23 to compare notes.
The original log entry shows 6150 rpm static with 14 degree pitch on the prop. I had to drop the prop pitch down to 10.5 go get close to that, so either the earlier log entry was wrong, or the engine has lost power. I've been through everything now, and the engine seems to be in great shape, so I've pretty much concluded that the original numbers were just wrong. It could have been a bad tach reading, or incorrect pitch adjustment method, or something along those lines.
PowerFin "B" 62" 2-blade. This is what Powerfin recommends, and I think I saw 12 degrees as a recommendation.==================
Yes, the F-23 is rated at 50hp at 6150 rpm. What Lenght and Number of Blades are you using?