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Author Topic: Well, its wind-powered!  (Read 3202 times)

andrewh

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Well, its wind-powered!
« on: March 03, 2009, 02:06:35 AM »

So naturally I think the world really needs a VAWT powered racing footy catamaran :}

Not quite being sure of the ideal setup - strangely the books are silent on 12 inch Savonius rotor yachts - so I built one last night and tonight


Hulls and above

the stuff in the water

In the DFTF - works well with a hairdryer


Amazingly the pop-bottle prop is quite close to workable - I must make a variable-pitch prop since the second channel thet we are allowed is not needed for sheets, or sails

I look forward to sailing straight upwind - confounding the tackers :}
andrew

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dreadnought72

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Re: Well, its wind-powered!
« Reply #1 on: March 03, 2009, 08:40:15 AM »

Of course, by going upwind you'll just get faster and faster until the bearings melt.  %%

Andy
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Enjoying every minute sailing W9465 Mertensia

andrewh

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Re: Well, its wind-powered!
« Reply #2 on: March 03, 2009, 09:15:48 AM »

Andy - you got the idea :}
Hydrofoils for upwind travel - it won't be beating, no tacks required
I saw a windmill catamaran in Pop mechanics in the mid-1960s - never forgotten it, but it was a horiz, axis with (Ugh, I cant bear to say it) gears

Love your master-planker avatar!
andrew
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dreadnought72

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Re: Well, its wind-powered!
« Reply #3 on: March 03, 2009, 06:36:03 PM »

That's no avatar - it's the output of a CAT scan of my brain.  %%

Andy
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Enjoying every minute sailing W9465 Mertensia

Jimmy James

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Re: Well, its wind-powered!
« Reply #4 on: March 06, 2009, 11:15:58 PM »

 :-))At last some thing new to try.. Looks like it could be fun...
Freebooter
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Experience: 50+ years at sea under Sail, Steam & Motor
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andyn

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Re: Well, its wind-powered!
« Reply #5 on: March 07, 2009, 12:11:25 AM »

Looking good, but I still want to know how you managed to gain access to my bath...
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amdaylight

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Re: Well, its wind-powered!
« Reply #6 on: March 07, 2009, 03:32:48 AM »

So how well does it work, have you tried it out side yet? By the way I really think that is a great idea. :-))

Andre
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andrewh

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Re: Well, its wind-powered!
« Reply #7 on: March 09, 2009, 01:29:40 PM »

great - a full set of andy's/andrews/andres :}

Now I have given away my little daughter, there may be a little time to give her a try before heading for the Canada/US later this month

There is a little improvement to do first - as pictured she was assembled in a hurry because I was eager to see if the idea worked at all!

The turbine is already being replaced (at least in my mind) by a combination Darrieus turbine with a Savonius section as a "starter"  I would like to make the Darrieus section as a helix - but will have to imagine a way to do this first.
I can see a way to spiral wrap an airfoil section with a flat bottom - let the epoxy harden then add the inner section of the airfoil - all darrieus blades seem to have a thin symmmetrical section set at Zero degrees - ie the camber line perfectly tangential

AndyN - if you can use my workbench, I don't see why I can't do tests in your bath (or DFTF)
andrew
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konewone

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Re: Well, its wind-powered!
« Reply #8 on: March 24, 2009, 09:47:06 AM »

Clever cookie  :-)) tackless sailing ... GREAT IDEA !!! now you've done all the hard protype work just wonder how long it will take the Chinese  :o to copy and sell it ... reckon you should patent it !
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