I took on the job of building a set of hulls for Kurts 28’ power cat design which we stretched to 31’ by adding about 2.5 inches to every station. We upped the stringer size by 30% and glassed with 8oz rather than 6oz but otherwise stuck with the plan and laminate schedule. We used multiple layers of 8 and 10oz to make up biax tapes, i find it makes for easier fairing and allows for tapering the buildup. We did a half-way-to-yacht quality fairing job, primed with 545 and installed cleats, hatches, fuel tanks, and fuel fills. There will be lightweight 25 hp engines mounted on rear transoms. We finished both hulls and shipped to the owner in maine, who is going to build the cross arms and center cockpit over the winter. I really can’t recommend committing to building a boat over the summer in sarasota, florida in a non-airconditioned space, but, in the spirit of running a marathon, and other ridiculously painful ways to enjoy yourself, we did it. Total build time, including purchasing, hardware, and mounting on a trailer for shipment, was in the neighborhood of a thousand hours. LOTS of pictures after the break-
Continue reading Building power cat hulls
The MV Bluebird is undergoing seat trials on Lake Victoria now. It is built from developed plywood/epoxy, with lots of core on flat surfaces. The whole thing went over in several containers after it was built near Seattle. I will be offering an option that is not quite as wide and a little lighter also.
https://www.facebook.com/EWFerries# I see this link only works in Face now. If it gets onto Youtube, I will grab it.
I finally got pictures of my 40′ F40 daycharter cat design from China sailing.
The factory there says price fob China should be around $200K complete. I do need to get over there soon and make sure they are ready for prime time.
64′ daycharter cat out of Kauai. Look at how little wake at just under 30 knots. 65 pax.
This office has been a leader in creating efficient, user friendly passenger ferries.
Most of the catamaran ferries that I see are designed by large design offices, and in my opinion, designed badly. They are usually metal, are heavy, have poor efficiency, and a poor ride, compared to what they could have. There are significant reasons for that. Those catamaran ferries come from offices who have been designing single hull ferries decades. They do cats now like they always did the monos.
I come from a sailing catamaran background. Instead of just piling on the horsepower, efficiency is important. I carry these lessons to the passenger cats that I design. I expect the gold plate design offices will figure this out in 5 years or so. That technology here now. For more discussion ofdisplacement power multihulls see this article.
We offer a full line of USCG-certified multihulls and the experience in working with the Coast Guard to get owners operating in the least possible time.
KHSD Charter multihulls emphasize functional, efficient design combined with longevity and durability. Many of these designs can use rapid construction technologies for hulls and house cabins.