Join Date: Apr 2011
Location: Lake Tahoe....boat is in SF Bay
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Prop "sea Trial"
I thought someone might find this useful or interesting. Recently performed a “propeller Sea Trial Test” that I got from Bruntons, the maker of our 3 blade Autoprop. Our bottom had just been cleaned. 3 cylinder 32hp Westerbeke with a ZF Hurth V drive. 37’ double ended hull probably pushing 20,000# with all the stuff in her. Did two runs on a fairly calm river, one up and one down. 10-14knt wind on the beam, so speed might be a little high. This is the average of speed over water. Max rpm at idle is 3600 which matches the engine specs. I’ve sent the data to Bruntons for their opinion. Just curious what they think.
Rpm Speed (knts)
3000 6.7 (engine maxed out here, wouldn’t do more rpms)