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Good kite for boat

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Munti
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Re: Good kite for boat

Postby Munti » Tue Mar 19, 2019 3:46 pm

tomtom wrote:
Tue Mar 19, 2019 3:39 pm
You need grunty kite optimized to low flying speed - otherwise kite will sit on edge of WW with little pull because you boat will had almost no speed.
Normal kites are optimized to generate apparent wind while ridden fast.
What is "grunty kite"?

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Re: Good kite for boat

Postby edt » Tue Mar 19, 2019 4:25 pm

Typically When I have seen kite power used to assist sailing it was for a freighter like the cargill ocean transports, airbus seawing, sky sails and the way they set it up is with a huge foil kite that just constantly loops and pulls the boat directly downwind, but the kite is packed away for upwind travel. There's a mechanical arm the kite is attached to which loops the kite. so yeah that probably isn't any help. the other versions of kite power on a boat are like mentioned above, where the kiter controls the kite constantly and it's attached to a small boat like a cat or tri. Several times out on lake st clair we have had boat failure of one sort or another on our power boats, we boat out to the flats, launch off the boat kite and then boat back home, anyway the motor failed a few times and we and made it home by launching the kite and using it to pull us but it's really awful because a powerboat is just not designed to be pulled by a kite. You want to custom design your entire boat around this sort of project I think. Anyway good luck and happy sailing! If I have a kite on a powerboat and am thinking about using it for propulsion it is my very last option, I want to get the engine working first, and only use the kite if it's an emergency.

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Re: Good kite for boat

Postby tomtom » Tue Mar 19, 2019 5:26 pm

Grunty kite is kite with profile optimized for low flying speed - so it has "grunt" even while flying slow. Typically this means deep heavy cambered profile.
Looping the kite can solve low boat speed - although only downwind.

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Re: Good kite for boat

Postby Hansen Design » Tue Mar 19, 2019 5:27 pm

Hello Munti:
PM sent.
Cheers!
- Bill

Munti
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Re: Good kite for boat

Postby Munti » Tue Mar 19, 2019 6:53 pm

tomtom wrote:
Tue Mar 19, 2019 5:26 pm
Grunty kite is kite with profile optimized for low flying speed - so it has "grunt" even while flying slow. Typically this means deep heavy cambered profile.
Looping the kite can solve low boat speed - although only downwind.
Sorry, english is not my native language. So grunt means power or something along those lines?

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Re: Good kite for boat

Postby knotwindy » Tue Mar 19, 2019 8:51 pm

Closer to torque than horsepower.

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Re: Good kite for boat

Postby tomtom » Tue Mar 19, 2019 9:09 pm

Grunt = Power = Lift - but from slow flying kite - means almost from start while riding slow.

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Re: Good kite for boat

Postby Munti » Tue Mar 19, 2019 9:27 pm

Ok, so where do I find a grunty kite. Do you guys know of any I should have a look at?

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Re: Good kite for boat

Postby slide » Tue Mar 19, 2019 9:42 pm

the gruntest kite I know of is a flexifoil blade3 10.5 , and it pulls like a train , but you might be talking lei I assume

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Re: Good kite for boat

Postby Goavegas » Tue Mar 19, 2019 9:58 pm

Don Montague has the experience you are looking for.


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