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#Post#: 4910--------------------------------------------------
Re: Sail Blade VAWT
By: sdewolfe Date: December 6, 2014, 4:34 am
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Don't mind me, I'm just reading and thinking. ;-)
The steel lock collars are heavier than I would think is
necessary. Just drill the end of the rotor to accept a set
screw.
We all know how much plywood loves moisture; you might want to
to be generous with sealant. Plug the hole behind the set screw
to further seal it from the weather.
Repeated removal and installation will eventually wear out the
threads in the wood. Then you would need to move up to a nut
insert. But, just the bite of the wood should suffice to get
started testing.
Regards,
#Post#: 4914--------------------------------------------------
Re: Sail Blade VAWT
By: rrattink Date: December 6, 2014, 6:33 pm
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time to build. bought my materials and will upload a pic or two.
wish me luck.. ;)
#Post#: 4916--------------------------------------------------
Re: Sail Blade VAWT
By: sut Date: December 6, 2014, 7:47 pm
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Just remember slow and steady! speed tends to lead to mistakes
and I wish you luck
#Post#: 4932--------------------------------------------------
Re: Sail Blade VAWT
By: lynx wind Date: December 17, 2014, 3:46 pm
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Way to go! Easier to make blades this way, isn't it?
#Post#: 4935--------------------------------------------------
Re: Sail Blade VAWT
By: nessprojects Date: December 17, 2014, 5:20 pm
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Looks very good and very responsive.....What diameter are the
sails at ?
#Post#: 4937--------------------------------------------------
Re: Sail Blade VAWT
By: nessprojects Date: December 17, 2014, 5:50 pm
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My thoughts would be to have a shorter chord size whilst
maintaining the diameter but I could be wrong.
Also don't forget you need to match your alternator to the
torque from the sails.
Fantastic trials.
#Post#: 4949--------------------------------------------------
Re: Sail Blade VAWT
By: lynx wind Date: December 23, 2014, 9:42 pm
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@CG - That looks like a sturdy design.
CG or someone this year mentioned why not just use a disk
instead of rotor arms. That idea took root in my brain the last
couple days. I have the materials to make a fullscale Sail VAWT
but couldn't figure out how to cut the rotors.
I have a 24" x 24" piece of 1" thick foam from Home Depot and
some hardboard to laminate it with. I want the thickness to
keep the spars rigidly standing straight. I will cut the
laminated 1.5" thick rotor as a circle which wont create any
drag.
I have some free time this Holiday so hopefully will have
something to show and tell by next weekend. If it works out i
will update the DIY plans.
#Post#: 4952--------------------------------------------------
Re: Sail Blade VAWT
By: sut Date: December 24, 2014, 8:03 am
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You guys are doing great !!! 2 good Ideas! keep up the great
work cant wait for a finished one, Wish this Idea was thought of
before I started building the lighter 175. would you both weigh
the finished windmill when completed including the mag plate .
#Post#: 4953--------------------------------------------------
Re: Sail Blade VAWT
By: lynx wind Date: December 24, 2014, 9:06 am
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It's good to experiment in different directions and compare.
The bladed VAWTs work great, I just never knew weight was such a
big factor. The aluminum blades didn't seem that heavy. I have
my doubts about the sail blades in high winds, but we'll see.
#Post#: 4964--------------------------------------------------
Re: Sail Blade VAWT
By: sut Date: December 26, 2014, 8:29 am
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I disagree with you you still have to get the mass turning ,
now once you have it spinning I agree with you, but then its
centrifugal force you have to contend with. Very interesting
thoughts I wish I knew more
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