Home
JAQForum Ver 24.01
Log In or Join  
Active Topics
Local Time 17:33 17 Aug 2025 Privacy Policy
Jump to

Notice. New forum software under development. It's going to miss a few functions and look a bit ugly for a while, but I'm working on it full time now as the old forum was too unstable. Couple days, all good. If you notice any issues, please contact me.

Forum Index : Windmills : Inside out Lenz2 VAWT...pls help

Author Message
Chris220220
Newbie

Joined: 17/02/2010
Location: Australia
Posts: 29
Posted: 09:24pm 09 Mar 2010
Copy link to clipboard 
Print this post

Morning all,

I decided to try build a small lenz2 VAWT with some scrap wood and plastic I had sitting around the shed.

I followed a slightley modified design and put the hard plastic sheet over the two wing frames last night. wing is 32 inches tall (and I think 10inches wide to the curve)

The two wings were joined via a piece of ply on top the wings and it sat on the f&p spline with no magnetic hub.
the statot fitted nicely in a bucket atop a stool and it was ready to go.

with light patchy wind in the back yard the unit needed a little assistance to get going but happily rotated once the breeze got more consistant. It even self started and got up a good spin (~50rpm) for a while.
I then packed up and headed in for the night.

Yes this silly newby didn't take the plans out in the shed with him last night and hmmm well, read on.

It was only this morning I realised I screwed the wings on insdie out . The flat base facing out not in. So what diffence does this make seeing it happily span around the way it was ?
Will it go better once put the other way around?
Does this just mean the wings are working via the disrupted air going through the centre not the cleaner air on the outside?

Don't laugh too loud

Edited by Chris220220 2010-03-11
Regards
Chris
 
Downwind

Guru

Joined: 09/09/2009
Location: Australia
Posts: 2333
Posted: 12:11am 10 Mar 2010
Copy link to clipboard 
Print this post

HaHaHaha,

Backwards Ha..... it will suck the power out of the battery and put it into the wind....Haha.

Seriously i dont know what difference it will make just thought i would be cheeky.

Pete.
Sometimes it just works
 
Chris220220
Newbie

Joined: 17/02/2010
Location: Australia
Posts: 29
Posted: 08:02am 10 Mar 2010
Copy link to clipboard 
Print this post

Got home today took a few pics of the set-up and then set about swapping it around to how it "should be"
Spins well tonight in the Melbourne breeze. Looks like is get's up to ~70-80 rpm in the gusts.

Still not sure how the inside out set up would have faired. I think it stated easier than the way it is now.
Regards
Chris
 
turnymf
Regular Member

Joined: 04/10/2008
Location: Australia
Posts: 84
Posted: 09:13am 10 Mar 2010
Copy link to clipboard 
Print this post

Two wing frames?
 
Chris220220
Newbie

Joined: 17/02/2010
Location: Australia
Posts: 29
Posted: 09:19am 10 Mar 2010
Copy link to clipboard 
Print this post

Yes two wings. I'll load some pics soon
Regards
Chris
 
Chris220220
Newbie

Joined: 17/02/2010
Location: Australia
Posts: 29
Posted: 09:55am 10 Mar 2010
Copy link to clipboard 
Print this post






This is how it was
This is now

Regards
Chris
 
turnymf
Regular Member

Joined: 04/10/2008
Location: Australia
Posts: 84
Posted: 01:22pm 10 Mar 2010
Copy link to clipboard 
Print this post

Hi Chris
I think you need to make a test stand

How are you determining rpm?
cheers
 
Chris220220
Newbie

Joined: 17/02/2010
Location: Australia
Posts: 29
Posted: 11:28pm 10 Mar 2010
Copy link to clipboard 
Print this post

very crude, just counting at this stage.
Regards
Chris
 
Print this page


To reply to this topic, you need to log in.

The Back Shed's forum code is written, and hosted, in Australia.
© JAQ Software 2025