ballast hung on a flexible keel...

[harry cassin]

The US army vessel is very impressive, I wonder what the build time was and the cost of that project.

[Schoonner]

Thanks, I might want to make it really look more like a ama and cut half the horizontal part away.

[Schoonner]

Originally Posted by harry cassin

The US army vessel is very impressive, I wonder what the build time was and the cost of that project.

I dunno, I bet the budget was impressive. Apparently they liked it because they built more like it, but a little more refined. HSV 2 I think it is called. It supposedly only goes 41kts, but I doubt that is an all out full resource commited speed. I want to put a radiator like the P-51 Mustang had in the 1940's which used the radiator of the 1710 cubic inch 12 cylinder engine to heat air and cool water and the air stream emitted from it acted like a jet engine. We're talking about 300kts airspeed though.

I bet I could put some 'sails/wings... err maybe just call em foils? on her that use Bernoulli's principle and heated air or even steam to make like a jet engine and create lift so she will plane higher.


(http://www.barking-moonbat.com/index...-editor/14733/)

EDIT::

Maybe put the radiator in the tunnels to make more of an enclosed and pressurized ram-air style jet.

Here's a better picture of the amas.

[Schoonner]

ANybody know what the black things are next to the bowline?

Huh, the water cooled part of the engines, according to caterpillar, is supposed to be 80 degrees C which is close to boiling so I bet that P-51 style radiators combined with an exhaust/steam output could really make the thing cook. =0) Pun intended. =0)

[Schoonner]

I just thought of something!!! If I made a contraption that would fill one of the hollow foils with water if the boat capsized so that it would get heavy and rotate the boat around and then when it got to the water line the centerboard would swing back out again then maybe it would right the boat. Especially since it would then just hang down into the water on it's hinge once the boat was upright again. It the boat might list till the water was pumped back out, but hey, it would be generally upright right?

[harry cassin]

Hmm

[Schoonner]

So, when I formatted my hard drive and installed Win 7 I accidentally deleted the blender files I was working from. That's okay, I have solved lots of problems with the other foils. I'm calling them wings now since they flap up and down and generate lift both in air and water.

This is the best I could come up with. It would be simpler to make a mold that would consist of a large pipe with foam wrapped around it so that it is thickest about 3/4 of the way back from the leading edge to make the outer edge of the wing, and do the same for the lower/inner surface then clamshell them together. Now the wings are cylindrical in shape. =0) The outer edge is lower in front than in the rear by design because they will displace more in front so that when heeled they move the center of flotation forward to raise the bow a little. Just how much of that I will really want? Idk.... I don't know what 90% of the hydrostatics means. =0)

I am canceling some of the side pull that the foil will generate by changing the entrance angle along the leading edge to point towards the bow instead of straight ahead. This should keep the things from being ripped off the hull by water pressure. I don't know how much of that I need either.

Finally, they will be hinged so that they can travel upward only so far, but swing down so she can be put on a trailer and moved on U.S. roadways without special permits. =0)

I hope that these foils will punch through waves without causing problems, but right now I have no idea what the heck I'm doing. =0)

[gonzo]

The main drawback, is than when the boat rolls it will steer wildly because of the drag switching from side to side.

[Schoonner]

That's why they are on hinges and can swing freely, except that they can only go so high or so low. I made it that way so that they drag in the water to some extent on both sides no matter how much roll is involved. Maybe it will not be enough to counter what you are talking about? I was hoping that unless you are doing really tight turns it would sort of even out.

This is the furthest downward I would want them to travel. They would not have any device controlling their movement except buoyancy.

Maybe I want to move on to a folding multi-hull?

[gonzo]

A trimaran will have the same or less drag, more initial stability and a larger deck.

[Schoonner]

Maybe something like this would be better? Lots more initial stability, it will fold down, and will work even with pins locking it in place.

[Schoonner]

Actually, that's a lot of wet surface. This would probably be better.

[Schoonner]

Now it lifts the hull out of the water with telescoping foils ROFL!

[Schoonner]

Now that I look at that... Maybe I could make it into a simple add-on and you load the boat onto it like you would a trailer.


EDIT, It might just go straight and be really hard to turn though. LOL!