RE: [bolger] Bolger, Sharpie Catamaran Concept 24ft6in x 14 ft
Cats depend on long, narrow hulls with minimal displacement (minimum immersed surface area) for their performance. If you don’t follow these maxims a real dog results. Currently working on my cat design for the Westlawn program.
Bruce, thanks for posting this. I couldn't find anything else about
this design on the Web. Where can I learn more?
I think this is a fascinating concept. Its looks could be improved a
lot by designing some curves and non-90-degree angles into the
deckhouse. But I see some possible problems:
- I'm not sure if a sharpie hull is the best for a catamaran. Some
of the sharpie's advantages only apply when it heels, and cats don't
do much of that. The shape doesn't look easier to build than a
V-shaped Wharram type. I'm not expert enough to know how the
- A single keel and rudder in the middle is simpler than having one
in each hull ... or is it? Which is easier to build, really? I
don't see any clear advantage for the central appendage. Also, it
increases the draft quite a bit, unless perhaps it's meant to rotate
sideways and up? But if it did that, the rudder would go with it, so
you lose your steering.