Can you say what you mean by "fiberglass"? Laminated UD S-glass has a modulus approximately 4 times higher than typical spruce, or similar timber,...
We have a 15m, 50kts trihull powerboat design that is built in alloy as that is what the client boatyard wanted. All of Richards comments apply,...
In my case I can't do that, as I need the current pitch when there are wind and waves. This is the problem with such a large, light boat. The calm...
Yes, an old F40. If I had a cheap source of outboards I would consider it, as for my boat the same prop setup with three engines would work on...
Here are my thoughts, for what it is worth. Sorry in advance for the long post. My 12m cat has a single 9.9 high thrust Yamaha centrally mounted...
If the centre of wind drag is nearer to the hull than the centre of water drag, then keel first (this is typical) otherwise it will be the other...
Depends on the boat, but typically in anything other than a beach boat size, the volume of the mast alone won't be enough to hold the boat up...
Harvey Bowden had a setup to self right the Firebird Orion with masthead buoyancy and shroud release. Someone in the comments to that video has...
Wishbone booms do affect performance, because they don't allow the sail to twist off in the same way as a regular boom and track arrangement. This...
I have a foil/hull test rig on the front of a sailing catamaran hull (hobie 17) powered by an outboard. It uses strain gauges to measure lift and...
Don't H16 mains already have a reefing point in them? Reefed main in sensible wind and flat water and you shouldn't have any issues. Do make sure...
Definitely keep the track long. It will allow you to flatten the sail if you are caught out with a bit too much mainsail up, which is much safer...
You need to be cautious considering a central foil to increase righting moment on these boats. They are big, with a lot of inertia, and are not...
Agreed, but you don't want to calculate the load lateral stability assuming a trailer of 1400kg, and then actually drive with it at 800kg.
My 3500kg twin axle 8m trailer weighs 550kg. 700kg without my supports but plus the OP's stuff is a bit of a stretch, but no way is it going to be...
I've towed similar sized loads quite a bit (7.5m long x 4m high x 2.4m wide). Similar mass too (3500kg), but with a lower centre of gravity than...
Putting the jib on a sprit is not a problem as long as the sprit is strong enough to maintain enough luff tension AND the resulting centre of...
This is the dichotomy of foil control. You don't want the boat to respond to waves below a certain period, but you do want it to respond to waves...
Your calc above assumes that the wand takes a full second to move the flap. Why do you assume this value? If this was correct, then the flap...
Why would it not make sense for a wide multi? On a wide multi the roll is just local heave on each side, and the sum of both is net heave in the...
