Author Topic: wing profiles available? This is not a commercial listing  (Read 1739 times)

0 Members and 1 Guest are viewing this topic.

itsandbits

  • Newbie
  • *
  • Posts: 25
wing profiles available? This is not a commercial listing
« on: November 26, 2010, 01:55:34 PM »
I developed these wings after looking unsuccessfully for a suitable shape and posted in the classified a request for information anyone had on any blades/wings that are available on the open market as opposed to proprietry, so that any one looking for a ready made unit could pick and choose the location and type of wing/blade they were interested in trying out if they did not want to make it themselves. The reason I am posting here is that I am sure there are more than two types available; and I would like to document them so that anyone wanting can easily find one. it would give people a choice of a  tried and true profile for someone to bolt on. I have found 2 so far, 1 in Germany, 1 in Australia, any other listings?
 These are my wings flying on a vawtL
http://www.youtube.com/watch?v=HljldZJ0JKI
http://www.youtube.com/watch?v=XIFwF87K424

SparWeb

  • Global Moderator
  • Super Hero Member Plus
  • *****
  • Posts: 5452
  • Country: ca
    • Wind Turbine Project Field Notes
Re: wing profiles available? This is not a commercial listing
« Reply #1 on: November 28, 2010, 02:47:39 AM »
Hi,
The turbine looks nice - so does the view from your balcony!  Is that Vernon?
Sorry if I didn't follow exactly what you want:  Do you want to replace those blades with something else?  Or are you offering to make this kit for anyone who wants one?
No one believes the theory except the one who developed it. Everyone believes the experiment except the one who ran it.
System spec: 135w BP multicrystalline panels, Xantrex C40, DIY 10ft (3m) diameter wind turbine, Tri-Star TS60, 800AH x 24V AGM Battery, Xantrex SW4024
www.sparweb.ca

Cary

  • Newbie
  • *
  • Posts: 17
Re: wing profiles available? This is not a commercial listing
« Reply #2 on: November 28, 2010, 10:34:46 AM »
actually there is a Canadian link too.. our Univercity in Regina has a 3.5 just installed from  http://www.cleanfieldenergy.com/

itsandbits

  • Newbie
  • *
  • Posts: 25
Re: wing profiles available? This is not a commercial listing
« Reply #3 on: November 28, 2010, 03:32:10 PM »
sorry guys, I guess I didn't get my point across clearly.
I want anyone who has seen a profile that is public domain and works and is not posted already to draw a picture of the profile and tell a little bit about it performance wise; does it self start,etc. and or put a link in here where it is available to be bought/looked at so that someone looking for a ready made blade/wing can find a tried and true unit .
I think as they become more popular there is going to be some demand.
here are some links to wings
http://vertikal-windkraft-anlagen.de/produkte/h-rotor-rotorprofil-symmetrisch-naca0018/
http://www.ecokraft.se/Shop/Index.php?sLang=LangEng
]http://www.thebackshed.com/windmill/Trade/AlBladeOrders.asp[url]
http://www.windenergie-technik-crome.de/ProfilCK220.htm[/url]
I live in Kamloops but pretty good guess, the view is nice to wake up to
If you know what kind of profile they are using you could put the shape here with some info. I think it is an asymetrical shape of some type if I remember it. or if they are selling the wing put the link in

itsandbits

  • Newbie
  • *
  • Posts: 25
Re: wing profiles available? This is not a commercial listing
« Reply #4 on: November 28, 2010, 10:06:34 PM »
Hi

This is the airfoil we used with good success blades 20 ft long by 24 inch cord.

Station
%cord :- upper lower
0.000:- 0.000 - 0.000
0.250:- 1.090 - 1.090
0.500:- 1.527 - 1.527
0.750:- 1.856 - 1.856
1.250:- 2.367 - 2.367
2.500:- 3.268 - 3.268
5.000:- 4.443 - 4.443
7.500:- 5.250 - 5.250
10.00:- 5.853 - 5.853
15.00:- 6.681 - 6.681
20.00:- 7.172 - 7.172
25.00:- 7.427 - 7.427
30.00:- 7.502 - 7.502 Main Spar at this point.
35.00:- 7.440 - 7.440
40.00:- 7.265 - 7.265
45.00:- 7.000 - 7.000
50.00:- 6.655 - 6.655
55.00:- 6.240 - 6.240
60.00:- 5.775 - 5.775
65.00:- 5.190 - 5.190
70.00:- 4.540 - 4.540
75.00:- 3.817 - 3.817 Rear spar at this point
80.00:- 3.053 - 3.053
85.00:- 2.290 - 2.290
90.00:- 1.537 - 1.537
95.00:- 0.760 - 0.760
100.0:- 0.000 - 0.000

The blade wasn't self starting it used a small SV rotor on the top to get it moving the blades where set at 8 degrees helix angle to make it run quieter and the second improvement was fitting vortex generators at 5% cord station spaced every 3 inches along the blade, this gave about 20 percent extra torque.

We used 6 blades on a 10 foot diameter mill, it ran best at 120 to 135 rpm.

All the best

Bob