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
I got the GPO-3 fiberglass sheet from Online Metals dot com. I hoped to substitute it for the more expensive G-10. Looks like it worked. It is smooth like G-10 though in the picture above it looks rough.
This 2 foot by 2 foot sheet was $10. Picked it up myself. Compare to same size G-10 at McMaster Carr at $47 plus some $20 shipping.
The red probably means it is phenolic. Both of these are fire resistant.
The panel looks like it was made with chopper gun, but it will be used for low load applications, so no worry.
They did used to be a friendly neighborhood supplier. They have been bought by Thyssen Krupp and have a new corporate bureaucracy feel now. Good prices though.
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.
Hulls and tubes are done. They plan to build more from the molds. Price is still unclear.
I get all my needed and possible fiberglass products here at McMaster-Carr. http://www.mcmaster.com/#
I mostly buy G-10 fiberglass sheets to fabricate into door flanges, winch bases and the like. My friends at CSR Marine buy reams of the stuff.
Here is a non Facebook link to be able to track the voyage of the KHSD 50 something cruising cat. Follow the Sailboat by satellite. When the map appears, if you click on the boat and each dot behind them you can get the location, direction, and speed.
We finally get to see some pictures of Chris Anderson’s cat that he designed and is building. This is going on in New Zealand. North Island I think. This is a CM (cylinder molded) developed plywood vessel. Chris goes away back on the process. In fact he is in the original CM video.
If I may throw in a bit of bio: Chris led the team that designed the fly-by-wire controls for the Boeing 777. I’m surprised he has not also been interviewed by Wolf Blitzer this week.
Being from the antipodes, Chris did not know about Autocad, so he designed and used his own 3D modeling CADD software.
This unit will have 6 unstayed masts. I recall seeing the rig arrangement fastened to the top of his car; he was conducting tests.
Good stuff and great to see it move along.