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- Dictionarykeel/kēl/
noun
- 1. the longitudinal structure along the centerline at the bottom of a vessel's hull, on which the rest of the hull is built, in some vessels extended downward as a blade or ridge to increase stability.
verb
- 1. (of a boat or ship) turn over on its side; capsize: "it's going to take more wind to make this boat keel over"
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Aug 24, 2008 · lewisboats Obsessed Member. The keel is generally the solid centerline of the boat, to which the bottom/sides join, the foils are attached or are an integral part of and the framing is anchored on...but not on all forms or styles of boatbuilding. Witness a Collin Archer carvel design with a full "Real" Keel vs a Stitch and Glue Bilge "keeled ...
Aug 9, 2008 · The hull design was originally developed for a 404km race that I did a couple of times. The design condition is 12kph at 150W. Once you encumber the boat with the weight and complexity of a flywheel system the speed will drop off considerably. So it is a long distance cruiser for relatively sheltered water.
Aug 26, 2008 · Hi, I do love also power trimarans, but do you think it's worth all the work for a 3 meters 8 HP boat?
Jun 12, 2020 · As for flat bottoms, they are very stable, depending on location of center of gravity. Take a square block of wood, like a 2x4, compared to a round 4" dowel. That 2x4 will always settle on one 4" face or another. The dowel will roll all over the place. Once you put a weighted keel on one side, the story changes a bit.
May 28, 2012 · To start, i'll apply the Force equation derived above: A1* (v1^2)*d1 = A2* (v2^2)*d2, where v2 is the speed that the keel area is moving at it's center. Say there was no damping, and the wind caused A1 to move with velocity v1, rotating the plate by an angle of d@, for a total distance of r1*d@ radians.
The reference area is whatever you want to define it as - it's typically the planform area for a keel. It doesn't matter if the area is divided up into two narrower surfaces or is one surface. Actually, the best parameter for comparing two keels would be the wetted aspect ratio, which is the depth^2/total wetted area.
This is referred to as the “wave-rise’ factor. The angle of the spray root line, α, relative to the keel measured in a plane normal to the hull centerline and along the keel can be established from a knowledge of the deadrise, trim and π/2 wave rise factor. Thus, it can be shown that: α= Tan. − 1 ⎛ π. ⎜⎜ ⎝.
May 18, 2006 · The angle of attack is not the same as the keel angle because their are so many variations in keels.And of course all lift has a sideslip component. The racy set may have 12ft draft and a foot wide keel , so they can out point their competators and force a situation. The cruising folks are far more interested in shallow draft , driving over ...
Jan 24, 2011 · If I used Rhino for hull model, I would draw different sections, define keel and deckline and use "sweep2" command but I know that it's too much work. Another option might be drawing waterlines for specific heights and using "loft" command.
Jun 12, 2021 · A lighter modern boat might reach hull speed in less wind, or a narrower, heavier traditional boat might be able to maintain close to hull speed in choppier conditions. A bigger difference is likely to be noticed in light winds where the excess wetted surface of a full keel and wineglass hull will hurt the traditional boat disproportionately.
