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Old 15-12-2012, 10:20   #1
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Join Date: Feb 2011
Location: medusa NY
Boat: Tayana Surprise 45 schooner "Union Pacific"
Posts: 2,098
i hate asking silly questions here....

but here it goes.
can i take a fully built fiberglass cat, and modify the hulls extensively?
looking at a fiberglass cat with a planing hull. so i would want to change it to a trawler/sail hull. the inside is fully finished.
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Old 15-12-2012, 10:24   #2
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Re: i hate asking silly questions here....

You can do almost anything, but whether or not it is wise to do is another question. I have seen motorboats converted to sailboats and sailboats converted to motorboats, but almost without fail the result is a very poor vessel.
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Old 15-12-2012, 10:26   #3
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Posts: 2,098
Re: i hate asking silly questions here....

it would remain power, just have no interest in twin 400HP engines pushing me at 35Kts.
and drag would be much less with a more canoe like hull.
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Old 15-12-2012, 11:03   #4
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Location: Texas - USA
Boat: Twin Otter de Havilland Floatplane
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Re: i hate asking silly questions here....

Unless you are a licensed marine architect with deep pockets, I would not try any conversions on my own. There are "tons" of calculations to be made, of forces that will be exerted on the hull. This will involve a complete redesign, testing and certification for "one of a kind". Take my free advice: Don't do it!
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Old 13-01-2013, 09:38   #5
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Location: Key West FL - Burlington VT
Boat: O'day 32 CC Ketch
Posts: 493
Re: i hate asking silly questions here....

I would think if you pulled the 400 twins and sold them, then slap a pair of beta 38, 60, or 90s in, your fuel usage would drop dramaticly, as would your speed. Aim for 10kts max, 6 or 8kts cruise. New props are a must and I would pass on cutting into the hulls unless you have a real good plan. A repower for slow speeds seems doable.
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