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Old 02-28-2013, 09:03 PM   #20
Underway
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Join Date: Aug 2012
Posts: 741
Quote:
Originally Posted by manyboats View Post
I wonder if the "draft" number is intended to be w/o the appendages such as the keel and would Daddyo's boat conform to that?
The vicprop calculator says use "molded draft" (without keel, etc). Difficult to tell from the photo I used on Yacht Yorld. I knocked off 4" from the Yacht world spec and went with 4.5 feet. Difficult to tell with these semi-planing hulls.

And I just reran the numbers for a second gear ratio (2.5:1) s @ 41' lwl.....

For 2:1 ratio 3 blade 23.3 x 16.4, 4 blade 21.9x 16 (my original calculation)

For 2.5:1 ratio 3 blade is 26.6x20.5, 4 blade 25x20

Didn't realize the change in ratio would be that significant. Likely that I guessed the wrong ratio (2:1) the first time I ran the numbers...
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