As Ad Hoc suggested a good step is to make flaps at the good size. The pics sent by Tonipu show far smaller and worst far less rigid flaps, not...
I do not understand the wish to enter in so many efforts for making just a 18 feet free standing mast with just 90 sq feet sail. That is pretty...
The systems 3 works pretty well. What do you mean by "signifant amount of outgassing with it when applied over itself"? The Raka 127 for wood...
I have some experience in epoxies. I began to use it in Sweden in 1970 as apprentice in a luxury yachts shipyard, I have a little experience......
Ilan Voyager 21.8 meters, 7 tons fully loaded, 28 knots with 240 HP.
Look at this thread Concrete Canvas Junk Voyager - design and assistance...
Fiber in different ways (strands, canvas, in a lot of materials from linen to steel cloth passing by bamboo and fiberglass) with cement is an old...
You're welcome
Ultra Light Displacement Boat. Generally very light monohull sail boats primitively not intended for planing. That began with the light skerry...
In Russia you had excellent pine and birch plywoods largely of marine quality even if not marked as. Probably you could find a good suitable...
Some remarks. The canoes are made with an alu alloy series 6, heat treated. The plates used for a canoe are generally a 6061 state T1-T2 max T3 ie...
Dejay's idea is excellent. A trimaran or better said a motor stabilized monohull with 2 small amas is a very simple boat, rather seaworthy, easy...
Welcome to the joys and torments of designing anything from the foldable table of the living room to the Saturn V rocket. As you are thinking of...
I'm going to ask some stupid questions about the design choices. On a very small boat 15 knots it's definitely planing, even 10 knots is already...
It's not a classic bulbous bow as for cargos which has a totally different shape. You can't call it bulbous bow, the shape is very far from a bulb...
You're right for the scull, and some have problems for rowing not facing the direction. By experience I can say that a well made "scullmatic"...
A 140 meters 30 knots 4800 to 6000 tons patrol frigate is not expected to approach unsafely the coast at any speed and stays always in blue water,...
Dear Ad Hoc, necessity is mother of invention . If Mr Marchand says himself that he added his peculiar bow design to correct a heavy nosed boat,...
I've dozens of similar shafts on warships and the 5 blades propellers look rather classical. The bow seems more designed for getting more volume...
Mediterranean Sea is not a relatively calm sea. The winter can be pretty harsh and nicely windy. The worst is the short sea with pretty steppy...
