Apr 16, 2013 · Hmm..a black boat with black sails in the Australian sun. You will roast. The famous designer Herreshoff was quoted" There are only two colours to paint a boat. White and Black. Anyone who paints their boat black is a fool "

May 10, 2016 · Since we now know EHP all we now need is the SHP. Thus SHP = EHP/PC. The PC for a prop boat is different to that of a waterjet boat. As a very quick rule of thumb, you can use a range of PC for a prop boat as 0.5-0.55 and a waterjet boat from 0.6-0.65. Thus it is quick to see a waterjet boat has a better overall efficiency in the system.

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Jul 3, 2016 · UK’s TITANIUM sails continue this heritage of innovation through a new process of building the film-fibre-laminate sails. It starts with two thin films made of tough PET that are coated with a co-polymer to comprise the outside faces of the construction, with the familiar pattern of load-bearing carbon fibres oriented along load paths in the ...

Oct 22, 2020 · Consider the boat/aircraft/mop bucket as a black box, which direction does the air leave the system? The direction of thrust is in the opposite direction to that. Blowing a fan over sails will always be less efficient than just pointing the fan out of the back of the boat.

Apr 6, 2008 · Single chine plywood has got to be the fastest to build. Many skiffs answer that description. A flat iron skiff is a versatile boat, able to row, sail, and motor while being about the simplest to build with the exception of the banks type dory, which rows very very well but motors only with added complexity and sails rather poorly.

Nov 29, 2012 · The black pipe in your mast is a no no. The mast should be kept as light as possible consistent with the load that will be applied. A shaped wooden mast is cheap enough if you are willing to do the work to make it right. Cheap sails can be made of Tyvek which is a big box store (Home Depot, Lowes, etc.) item.

Jan 31, 2013 · Bethwaites books talk about 10% being ideal apart from when lumpy when it goes up to 12%. Even on the WB sails website they have a masthead shot of " the fastest 470 sail " and it has a camber of ~14% in the head. I have shots of North SailsnSnipe sails with 18% in the head now that is a long way from the "ideal" 10%.

Jan 15, 2008 · There was a great satire of the SORC published in Yacht Racing in the late 70's called "The Year of the Black Deck." It concerned a hot-shot racer who ordered a new boat with a white deck and black hull. When it was delivered it had a black deck and a white hull.