Location: New Jersy Where can I find some hull photographs or manufacturers that make very good hull designs ? Assuming a boat about 20' & V8 The attached perspective drawing shows you what I did on the Cherubini 20 bottom for the jet drive.
I have used a similar bottom for the Saetta 20, which originally had an inboard drive, and I have just reshaped the hull for a jet drive using a Hamilton jet.
Boat should not bow hook or become airborne unless I am stupid or showing off like a nut in a 21' X 4' boat. From the perspective view and the side (below) it looks like you have effectively taken a chunk out of the bottom to produce a flat for the jet intake. When we built the hull molds for this design, the hull plug was carved out of foam at DLBA Robotics in Virginia, and it had the full V, not cut away. Location: New Zealand Had you considered the merits of running the flat area (which we refer to as the 'delta', not sure of the origins but it could be due to the triangular shape) from the transom to just forrard of amidships? Yes, in fact, I did go through a rendition of the hull lines with a flat on the bottom exactly as Mat-C describes, not inclined like Speedboat's photo, and got all the way through general arrangement drawings. If I had to do it over again to provide a jet design in a speedboat, I would do it the same way with the bottom shape that I have developed, which I have used on a number of boat designs--the boats trim out and handle very well.


When making potentially dangerous or financial decisions, always employ and consult appropriate professionals. The 2016 Polar 12 Aluminum V Hull Boat is designed for trailering and has a deep flared bow to keep water spray off you. I’m look to build a real small wooden boat with small cabin equiped with with teh release canoe really a piroque plans in front I decided to make a real Their variable v bottom hulls include amp wave. Minimum bottom angle ~10 deg helps in keeping intake free from bubbles generated at spray-root forward. Jetsprint boats run a transom deadrise angle up around 24*, I've used 19* extremely successfully with a warped bottom. The same gusset blocks will be used on both sides of anything holding the marine plywood skins on.
The flat area forrard becomes quite narrow so as to minimise the effect of 'slamming' etc that you suggest.
I suppose I always assumed it would be done as a horizontal version of what speedboats has pictured, as in the pic below. Up for sale is a 12' Sea King Aluminum V Hull Boat with a 1996 Evinrude 6hp 2-stroke outboard motor.


I would have though it would create a bit of turbulence in front of the jet, as well as a possible area of 'negative pressure'. Although it does rotate the jet giving a 'trim up' effect, depending on the pump you use they have a 5* down angle on them anyway (to allow sump clearance for the motor to the bottom of the hull. That would give a flat 'pad' for the boat to ride on - quite common in many faster boats I believe - but avoid any potential turbulence problems.
Most were outboards, though some were also fitted with sterndrives and I think even a few jets.
The Jiffy Phoebe 22 is the result of the many requests I have had from builders who liked The plans admit six large sheets of drawings screening the hull atomic number 85 various.
Wooden and Plywood Boat Plans for Amateur Boatbuilders Excellent Performance Simple grammatical construction FREE PLANS BOAT PADDLES OARS & Plans for wooden boats.



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