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kev1n69

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Joined: 22/03/2011
Location: United States
Posts: 1

Posted: 09:18am 13 Jan 2013

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hello have followed this site for a few years and i am trying to put together a couple mills for use of powering my green house.
i have the paykel motors two welded steel wind mill mounts all i have left to get are the tail and the hub to hold these blades.
does any one have a recommendation for how many blades would be best.

i have one set of 5 blades should i just get another set of 5 or use 3 on each turbine and buy 1 more blade for a total of 6 blades on two turbines.

i get wind at 5 to 10 quite regularly, storms normally run 10-35mph
bad storms 35-50mph 1-4 times a year

i see missouri wind and solar has hubs but i was unsure which i need as they dont refrence the paykel

Raptor Generation 4 blades are the best
- Manufactured in Missouri by Missouri Wind
- Ran to strict specification and procedures
- Reinforced
- Impact resistant
- Colored for aesthetics
- Cooled to avoid warpage
- QC guaged 100% for size
- Inspected for flaws and appearance at three points
- Weighed for density
- Perfectly balanced
- Resistant to ultraviolet light (UV protected)!
- Will NEVER crack or degrade
- Clockwise rotation
- Each blade is 29" long
- Blade base is 6" wide
- Blade tip is 1 1/8" wide
- Mounting bolt holes are 0.245" and the bolt holes are 15/16" apart center to center
- Blades weigh approximately 1 pound each
- Lifetime Guarantee

thanks for any help or advice

Gizmo

Admin Group

Joined: 05/06/2004
Location: Australia
Posts: 5078

Posted: 11:25am 13 Jan 2013

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Those blades dont perform very well on a F&P based windmill. The diameter of the finished turbine is too small, and it has very little torque, so will have problems starting up.

I would forget about using them for anything other than experimental use, because the results will be dissapointing.

For a F&P you need a turbine between 2 and 3 meters diameter, thats 6 to 9 feet, depending on your local wind conditions. You could make a set of timber blades, there are lots of plans and tutorials on this, like the one on this site http://www.thebackshed.com/Windmill/articles/ChainsawBlades. asp. The GOE222 blades sold by forum members on this site are a very good match for the F&P, but delivery costs to the USA might push them out of your budget. http://www.thebackshed.com/Windmill/Kits.asp

Maybe other members could suggest commercially available blades in the USA. Ideally you really need to get blades 48 inches or longer.

Glenn

The best time to plant a tree was twenty years ago, the second best time is right now.
JAQ

wallablack

Senior Member

Joined: 10/08/2011
Location: Australia
Posts: 164

Posted: 01:01am 14 Jan 2013

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Have a ponder HERE
Seen these a while back when looking for blades...might suit.

Foolproof systems do not take into account the ingenuity of fools.

Catch66
Newbie

Joined: 13/03/2010
Location: United States
Posts: 27

Posted: 05:54pm 07 Feb 2013

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kev1n69,
Hello I'm also from usa. north country Montana.
I purchased a set of TLG very nice quality 3 blade design.
with my f/p. cut's in @ 48 v with 11 mph wind speed.. 36 v
system 10.5 mph.. and 12 vdc 9 mph.
they're called Boast Buster blades weight around 13#. I'm running them
@ 60 " they can be run @ 54" depends on which pattern in or out.

my 36 pole is 12 of 3 I have a extra stator will do 9 of 4.
my present coil configuration the turbine is very comfortable at 48v.
take care. hope my dimes worth helped.
Chuck

VK4AYQ
Guru

Joined: 02/12/2009
Location: Australia
Posts: 2539

Posted: 09:16pm 07 Feb 2013

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Hi Kev

I have trailed raptor blades and as Glen said the torque isn't there until the wind gets above 10 MS, the length of the blade compared to the rotor diameter isn't enough, I was testing 5 blade and 6 blade and a 10 blade and found them all much the same. the 10 blade did produce more power once it got going, they where designed as a high speed blade on auto alternator conversions and seem to work reasonably well on that application, where the rotor is only about 4 inches diameter but the F&P rotor is around 10 inches diameter so needs a lot more torque at a lower speed.

I then made 12 inch extensions bolted to the hub and blade and that made a dramatic difference. Not the torque of the GEO 222 blades but it saved them from the rubbish bin. might be a try in your case to make some use of them. The extensions where made of 2 inch x 3/8 alloy flat bar gig drilled to suit the blade and hub. They then started at 3.5 MS and generated useful power at 5.5 MS.

All the best

Bob Edited by VK4AYQ 2013-02-09

Foolin Around

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