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Prop Choice for the Helms 30
After some correspondence with a Helms 30 owner (Alex Miller) I went with a 13x10RH propeller from Martec. That ought to get me to the yard for a bottom job. I can check clearances for some future propeller once the boat is up on stands.
I know this is an old post (I just found it). FWIW, I did a pretty through analysis after measuring clearances and taking other of the boats parameters into account, and ended up with a 15x9LH Martec elliptical prop. It has proven to be a good choice over the past 33 years for my boat with the 12HP Yanmar (YSB12).
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