The customer decided on the solid wing version of the trimaran runabout. The solid wing version below.  Microstation stopped being able to do any trim cuts so I can’t put holes in the shell anywhere. I have to get back where I can complain to tech again to find out why the fail.

This is an update to my venerable 27’ sailing catamaran design. I am doing it first in foam/glass, largely built on a bagging table, then later will do it in CM developed plywood.
The interior space has increased, but the overall configuration is the same. The berth width inside will be just over 3’ wide. Like on the original, the galley and seating will be just inside.
It will still fit on a trailer. More on features when I get a chance.

I’m modeling an update to my early 27′ catamaran design. That was 1983 as I recall.
It will be first designed in bagging table foam/glass, then next in the rapid CM plywood epoxy. I’m trying to keep the original functionality but with sick new looks.

Redoing another version.  Figured out how to keep the inside space as big but looking smaller.  That’s what designing is.

Exploded view of a 79′ mini ocean liner I am working on.  Just a study so far.
I sent pics to Roman but no response so email address might not be working.

Later note.  I have already figured out two ways to do the connective job much lighter and easier.  Design process.

I am getting work done when out of the office.
This 25’ shuttle catamaran is designed to take people off of a beach, across a reef, and out to the deep water charter catamaran.
It is 25’-4” x 9’ x 8”. It can be trailered and will cross a very shallow reef easily where it will work in Kauai.
It has an almost flat bottom to maximize displacement, and flared sides to increase pounds per inch of immersion for every added inch.
Foam/glass.
Someone called me a couple of months ago from Oahu who wanted their deep water cat design to get across a 1’ deep reef. Could not be done. This could be the solution.

Does anyone have a suggestion on a plates expansion program that they trust? I have used Vacanti’s B-Plates for many years, but it seems Dave has given up on supporting it. It was always cranky but worked. Until now.  Both Microstation and Rhino proport to do that but I don’t trust them yet.

Over the last month I got to design an oceanography research drone. It is only 157″  long and carries a research cargo that I am not allowed to show. Oddly it is aluminum. The builders of the whole package were open to composite but the end users insisted on doing alloy.

This was the project that crashed both Microstation and Vacanti’s B-Plates program. Both companies seem to have given up on a solution. Among other problems, Microstation seemed unable to export any usable non-native surface nor solid format. I ended up only able to export the chine splines and customer had to make surfaces there. You would think that level of fail would be shareware, not a $5000 program.  Attempting all manner of work-arounds took longer than the actual billable work.

The notch aft is for an azmuth drive.

In any sailing magazine now we see that reverse bows are all the rage. For any multi to look new, it must have them now. I’m seeing an odd trend where designers are now adding reverse bows to any frumpy old design and presenting it as a whole new design. Its like any overweight production cat can now claim that it shares DNA with the America’s Cup cats. I do understand that the reverse bows do help a bit in smoothing the ride, but guys, if you put a hood scoop on a 1993 station wagon, it is still a station wagon. Like on the pic, it could even be a fragile station wagon, but it has the swag now.  Its like a yuppie magnet.
I have been doing reverse bows on many designs for at least 5 years, and I respect the power of the style tide. But look at all the station wagons posing.

I found a new source for plastic fasteners of all sorts, plus hinges and handles. http://www.craftechind.com/  While not usable for primary structure, I see myrid uses for light weight, non-corrosive  interior fastening.