The Roberts cat is essentially a powerboat with a sail attached. Sailing performance will be poor and you will be dissatisfied with it's passage...
They're not that different. Ulua can be made any length, while Wa'apa is made in 8 ft sections, so both can be made the same 16' length as...
I love Moana and have watched it countless times with my kids. It's much better than the typical garbage Disney pumps out. Personally I am...
It seems like hull deflection will be very small compared to beam deflection and not worth measuring. For catamarans Richard Woods says the beam...
Vivier's boat made of birch ply is for sale and seems to be doing well 15 years later. Pen-Hir, the architect own boat – François Vivier...
I've always been curious about the suitability of birch plywood. It used to be cheap here, but now the cost is the same as hydrotek meranti (about...
He wants to build in plywood.
Also, RW said this about aluminum cats
You're assuming a boat that weighs more than claimed can't sit on its lines. I could very easily be wrong, but I'm not the only one who has...
Again, I don't know. To be fair, some Gunboats do have very large boards, like the Gunboat 80 pictured below. That boat came in 1st out of a field...
There is also the Shuttleworth Tektron 50 (see below) which has two daggerboards. I estimate the boards to be 2.05M^2 each. The length is 1.78M...
Why would you look to Mumby as an example? A guy with no credentials and no website designing and building catamarans in a Philippine jungle?...
Oldmulti, here's an image that shows the whole craft. [ATTACH]
Yeah, I don't know the answer to this. Certainly what you drew is in line with a lot of cats out there. You say the boards on your current boat...
Hi Mulkari, Your designs looks nice. One thing: I noticed the centerboard and rudder look to be too small. According to woods the centerboard...
The hobie is relatively easy to capsize because it's very narrow, has a lot of sail area and has low volume in the ends of the hulls. The low...
Sure, but if you think about it the forward crossbeam will still be taking most of the load. When you design the crossbeams you calculate for...
Excellent, that should save a lot of labor. 0.12 m2 is shockingly small. I'm not sure why the later woods dory designs tend to have that extra...
It's a dory for most of the hull and veed in the forward section, like in the image below. I would imagine there is a lot of time saving on...
Ok, got it. I'm assuming you designed your last boat yourself? In that case you definitely know what you're getting into! Just more of the same,...