Excellent magazine!
The decision to use or not use a center-pod in a tunnel hull/catamaran design is determined by the objectives of the intended use/performance of...
I am with gonzo on his advice. I'm not clear on whether you're designing power or sail hulls, it seems that your goal could be to design a...
i agree with gonzo, re: aspects that affect fuel efficiency, including significant issues like planing surface deadrise, appendages (lower/drive...
i agree with 'fallguy'. check to see if your new 15hp has a 20" leg/shaft, compared to your old 5hp (maybe a 15" leg/shaft). this would make a...
it'd be helpful if you had some pictures showing the boat setup on trailer, and also while operating in condition that you're concerned about?
Hi Ed - i don't recall dimensions of the 21Scarab bottom, but the flat pad is a performance advantage when set up well. You're right that this...
Looks like a great boat and project! scarab bottom design is pretty well proven high speed configuration, what power are you using, what speed...
Check out here for design questions Tunnel Boats, Vee Hulls and Performance Powerboat Design https://www.aeromarineresearch.com/
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I would expect that your cavity areas would do more to disturb flow in region of lift strakes, resulting in reduced lift and increased drag....
Testing Electric-Powered 32-Foot Cat With 100-Plus-MPH Goal In Mind [IMG]
Great that you're getting improved results! Engine height still sounds too low. if water pressure still ok, you might find more improvement by...
Hi Tapani - it seems that your engine height is still too low. Raising height should reduce susceptibility to porpoising. This should also allow...