Crouch Hull Factor for OUTRAGE 25

Optimizing the performance of Boston Whaler boats
mwk4619
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Crouch Hull Factor for OUTRAGE 25

Postby mwk4619 » Thu May 16, 2024 2:33 pm

What is the Crouch hull factor for a 1985 Outrage 25 notched transom?

jimh
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Re: Crouch Hull Factor for OUTRAGE 25

Postby jimh » Thu May 16, 2024 6:37 pm

mwk4619 wrote:What is the Crouch hull factor for a 1985 Outrage 25 notched transom?
A figure 180 is a conservative number to begin, and at the highest possible boat speeds (with maximum power or even higher than rated power the much reduced wetted surface of the hull MAY result in) the hull coefficient rising to 190--or perhaps even higher if the hull speed gets really crazy, like over 60-MPH.

I use the coefficient of 180 for the typical moderate V-hull found in the classic hulls, and 190 to 200 for the rounded bottom hulls. Note that the odd-numbered lengths are typically rounded bottom hulls (11, 13, 15, 17, 21) and the even numbered hulls are typically moderate V-bottom (18, 20, 22, 24). But when the marketing department decided to change the 24 to be a 25, that broke the rule.