Home
JAQForum Ver 24.01
Log In or Join  
Active Topics
Local Time 07:03 17 Jul 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 : aluminium chinese blades

     Page 2 of 2    
Author Message
Gill

Senior Member

Joined: 11/11/2006
Location: Australia
Posts: 669
Posted: 06:44am 16 Feb 2008
Copy link to clipboard 
Print this post

Feral,
Did not download as there is already a wind turbine that has the features of this concept.
Gizmo's old model HEREEdited by Gill 2008-02-17
was working fine... til the smoke got out.
Cheers Gill _Cairns, FNQ
 
GWatPE

Senior Member

Joined: 01/09/2006
Location: Australia
Posts: 2127
Posted: 07:25am 16 Feb 2008
Copy link to clipboard 
Print this post

Hi fellas,

a bit off topic, but if I was to go with a mechanical arrangement, it would be a variable pitch HAWT.

This VAWT concept like LEU's windmill has large surface areas to be controlled. The v^3 problem would still exist.

maybe a separate thread should be started if there is enough interest.

cheers, Gordon.
become more energy aware
 
Faust

Newbie

Joined: 15/02/2008
Location: Australia
Posts: 15
Posted: 03:31am 25 Feb 2008
Copy link to clipboard 
Print this post

Just heard from the supplier, that my chinese blades will not arrive before April - bugger.... They promised to indicate now on their website that they are currently out of stock.
Knowing my impatient nature, I will have to revert to some home-grown blades in-between.

Some of you may want to take a look at the cycle hub motors at www.greenprobike.com. They should make good generators perhaps?

cheers

Faust
 
wllewellin
Newbie

Joined: 16/01/2008
Location: Australia
Posts: 4
Posted: 08:15am 25 Feb 2008
Copy link to clipboard 
Print this post

Faust, I have a brand new set if you are interested.
 
Faust

Newbie

Joined: 15/02/2008
Location: Australia
Posts: 15
Posted: 09:52am 25 Feb 2008
Copy link to clipboard 
Print this post

Hi wllewellin
Thanks for the offer. Need to check first whether I can get my money back from these guys. Pls e-mail me at
dpelz512 at bigpond dot net dot au

cheers

Faust
 
wllewellin
Newbie

Joined: 16/01/2008
Location: Australia
Posts: 4
Posted: 12:54am 29 Feb 2008
Copy link to clipboard 
Print this post

Faust, tried your email but no joy, will not go through.
Have a look at ebay item number 310027382034 i have got a set of these and they work really well and the hub goes straight on the chinese generator.
 
Faust

Newbie

Joined: 15/02/2008
Location: Australia
Posts: 15
Posted: 01:48am 29 Feb 2008
Copy link to clipboard 
Print this post

Sorry about that. Should work. I did not want to give my e-mail in clear text to avoid spam. Just type it in the usual way with the "at" sign as a "@" and "dot" as a ".".
I've seen the US blades but the UPS postage was skyhigh.

thanks

Faust

  wllewellin said   Faust, tried your email but no joy, will not go through.
Have a look at ebay item number 310027382034 i have got a set of these and they work really well and the hub goes straight on the chinese generator.
 
mimichris
Newbie

Joined: 16/11/2008
Location: France
Posts: 3
Posted: 12:24pm 16 Nov 2008
Copy link to clipboard 
Print this post

  Gill said   Spot on kumtarest
Here's some further info with more to come.

Blades arrived.
Pleasant surprise to find they are not solid but are extruded. I would rate the extrusion as quite good. Very light with a good finish though 95mm shorter than the old glass blades. weight 700g ea (glass 1,300g ea)





Comparison:





It's what they do to this quality extrusion that tells you it's Chinese. The tip (red) is a plastic moulding that is inserted into the extrusion. It is held in place by centre punching the aluminium, 2 on top n 2 below. God knows how these dimples stop the tip from flying off in a good spin cause I don't. Oh yes, a big gap on each is where the tip doesn't fit properly, but on the bright side, it gives the native bees and wasps somewhere to build nests.





now the mounting holes have a few issues too.
First, the holes are not the same dimensions. Old holes were 60mm wide x 60mm long CtoC, new holes are 60 x 45. Holes may have been drilled or chewed, not sure which. ("Grandfather Chan bought drill bit.. and looky... still workey.")
Axis of drill is vastly different for leading and trailing holes. See Pic.
no added support in hole area, and bolt clamping may crush extrusion or bolt may pull sideways through the thin wall thickness as blade spin loads the root.






Still I would cope with all these faults "IF" I can get a twist in it.
As I said the extrusion seems OK and I feel potential for a twist looks Vgood.
Will need to carve/shape 2 x clamps and devise a setup to twist yet maintain axis of blade and ensure consistency of the 3 blade twists.


Stay tuned..... Will post to forum when bent or busted.


Hello,
Do I look for a Internet address or on Ebay in China to buy three blades in alu, of 2 meter of long, to manufacture an AVWT of 1KW ?
Thank you by advance of your answers.
Maxime
 
Gill

Senior Member

Joined: 11/11/2006
Location: Australia
Posts: 669
Posted: 10:34am 17 Nov 2008
Copy link to clipboard 
Print this post

G'day Maxime,
The blades I have reported on here were purchased from an Australian importer as replacement parts for the wind generators he also imported. I have no idea where you can source them from in France. You say you want them 2 meters long. I am not aware if they are available in lengths other than the size I bought. There are other makes of blades available should you be able to purchase on an international basis. I am not personally able to suggest a blade suitable for a 1kw wind gen. I guess eBay or Google as a start point for your search. Or perhaps others can make suggestions.

Good Luck.

PS.
I believe you wish to build a HAWT (Horizontal Axis Wind Turbine) and not a VAWT (Vertical Axis Wind Turbine) as stated.
was working fine... til the smoke got out.
Cheers Gill _Cairns, FNQ
 
grolly

Regular Member

Joined: 19/05/2007
Location: Australia
Posts: 62
Posted: 10:30am 18 Nov 2008
Copy link to clipboard 
Print this post

Hi all ...Here is what happens to these blades in a blow, and remove the red end things as they will fly out in the first good wind you get, one at a time and really unbalance the mill...





best of luck, and dipping the ends in resin is a good idea, but I think they will still break at the end of the resin...
Grolly
BTW the holes are drilled that way to fit the original boss that has a 3degree twist G.
I have bought the farm...now I AM powering it...
 
KarlJ

Guru

Joined: 19/05/2008
Location: Australia
Posts: 1178
Posted: 07:59am 29 Nov 2008
Copy link to clipboard 
Print this post

I cant stop going back to the chainsawed blades from wood thread.

think he may be on a winner.

Luck favours the well prepared
 
     Page 2 of 2    
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