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My Swirled VAWT Idea | 20 comments (20 topical, editorial)

Re: My Swirled VAWT Idea (3.00 / 0) (#13)
by Akos on Sun Aug 24th, 2008 at 12:56:49 PM MST
(User Info)

Are you 100% sure, this is tsr<1 ?

http://www.youtube.com/watch?v=fXezZvMMT28

Anyway, I still think there are too many blades on it...
Three should be enough. On three different level above each other. This guy seems to be understanding the basics of his own concept, but fails to optmise it I think. Back side of his design gets no wind at all, despite of having efficiently tilted blades.
(Similar to my thinking is the WINgD Mill, which is shown on a video I have recorded 2 years ago.)

[ Parent ]

Re: My Swirled VAWT Idea (3.00 / 0) (#14)
by Stonebrain on Sun Aug 24th, 2008 at 01:18:03 PM MST
(User Info)

I'm quite sure tsr<1.If not,the blades moving downwind are in the wrong position.The video is taken on a very windy day.I don't know what the guy is saying(I don't have sound).
Anyway from the figures you gave in your comment this is completely clear.They explain like a sailboat sailing in a circle.

cheers,
stonebrain

[ Parent ]

Re: My Swirled VAWT Idea (3.00 / 0) (#20)
by spinner (itsmejonny@email2me.net) on Mon Sep 29th, 2008 at 07:36:10 AM MST
(User Info)

rule of thumb on a vawt is tsr=1
while it is true that some do achieve more, units like my dual helix are still: tsr=1.
experience has hammered home one fact to me: design it for sufficient torque then find a workable way to gear it up for more speed if ya need it.
note: generator design can help the thing work better at the speeds it produces.
note: when you gear for speed you need more torque than you do for 1 to 1 gearing
spinner

[ Parent ]

My Swirled VAWT Idea | 20 comments (20 topical, 0 editorial)

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