Wojtek began to think about her in late 1990s, built in early 2000s. He chose the size of 5.5m to be easily compared with popular Micro class...
Here is an even more radical design than modern scows: something between a scow and a cat. [ATTACH] Viper 550 by Wojtek Wierzbowski krzys
Hello A friend of mine called my attention on this boat: Sun Fast 30 One Design | Jeanneau Boats...
Stepped planing hulls are common, but this idea is not actually planing. This seems to be a displacement hull with many small steps, that reduce...
I wonder, whether anybody tested this old solution: [ATTACH] Looks interesting, but does it actually reduce drag? regards krzys
You are probably right. I guess this is also the reason of the upper limit for 90deg stability (it prevents using extremely lightweight masts and...
It's interesting to compare windsurfers with Class 40 boats. Funny thing, windsurfers appear to be a 1:3.5 scaled 40's. If we scale Class 40 boat...
The narrow hull has generally bigger AVS. It is mush more resistant to turning the turtle. For the presented hull, AVS is about 140deg, which is...
Generally, I aimed at trans-Atlantic races (both upwind and downwind), so 6-8m/s wind speed. The 40's are relativelylightweight and...
Yes, the transom drags water here. It obviously increases drag at lower speeds, in this case below 7 knots, but reduces the rapid growth of the...
Still thinking of a skinny 40, I recently obtained an interesting result. Never before analysed a skinny scow. So, here it is, hard chined, only...
Thanks for the response. My narrow hull was just a side effect of the deep-V stern, intended to improve the longitudinal balance. For me, the...
Yes, SES is another possibility to achieve 50 knots and acceptably smooth ride. However, we still don't have some crucial information: The...
If not rotating, the airfoil-shaped mast can perform worse than the circular one. Currently, the D-shaped mast section is considered to be...
But how to get there from your seat? OK, now seriously. The only solution I can see for now is to draw the hull entirely out of the water and...
I could imagine rollercoaster-style seats that provide enough safety. But I cannot imagine going to the toilet at speed. regards krzys
This proa looks like Reto Brehm's Lili'Uokalani. Is it? I've never seen her with this kind of rig. I wonder, how it works in compare to the...
I did. A 7m Janusz Ostrowski's Pjoa with traditional crab claw rig. It was only a 90deg knockdown, the sail in the water stopped the rotation. We...
Long time ago I played with the idea of a self-righting tri without any ballast, with low-buoyancy amas and buoyant A-frame masts. She resembled...
So, what about bending? Composite spars of glider wings or free-standing carbon masts are tensioned on one side and compressed on the other. If...
