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Ed Anderson wrote:
I certainly don’t claim nor believe I understand props – I just go to a reliable prop manufacture and tell told him what I had and what I wanted. When I originally got my 76x88 prop, I decided I wanted 200 more engine rpm and that is all I told Clark Lydic and he cut off an 2” off the diameter and I got my 200 rpm increase. Could have been just lucky, but a good prop guy can give you the right prop – IF you give him the right information.
The library section of my website I have a document call "How I Make Prop" (or something like that). The author's rule of thumb was that 1" off the prop tip will increase RPM by 100.
Real world confirmation of rules of thumb cause me to giggle like a little girl.
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