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Turdan DCPM 180V 4000RPM 1.5HP Treadmill Motor | 21 comments (21 topical, editorial)
Re: Turdan DCPM 180V 4000RPM 1.5HP Treadmill Motor (3.00 / 0) (#7)
by farhan on Wed May 7th, 2008 at 11:17:17 PM MST
(User Info)

Where i live the authority won't let us make big towers in our back yard, residential area. Can i use my roof top to install it? because here homes are not made of wood that they would vibrate, solid concrete buildings which i think can hold this little wind turbine. As for height what would you suggest the height should be, roof is already 12-15 meters high, but for backyard how high should i try to get best performance.

Never tried crafting wood, will give it a go, what type of wood is used for it and are the blades light or heavy? i read in many places but they do not say what wood they used.

Farhan

[ Parent ]



Re: Turdan DCPM 180V 4000RPM 1.5HP Treadmill Motor (3.00 / 0) (#8)
by Flux on Thu May 8th, 2008 at 12:38:58 AM MST
(User Info)

Mounting on a house is not ideal but should be ok with something as small as this. You may have some  trouble with transmitted noise.

Most woods will be ok. Try to get something straight grained and with no big knots.

Softwoods are easiest to deal with and common pine will be ok if you can avoid big knots, Spruce, cedar, Douglas fir etc are excellent.

For hardwoods, ash is fine but avoid the heavy ones. Avoid things like maple unless you have machine tools to work it.

Flux

[ Parent ]



Re: Turdan DCPM 180V 4000RPM 1.5HP Treadmill Motor (3.00 / 0) (#9)
by farhan on Fri May 9th, 2008 at 12:58:05 AM MST
(User Info)

Got your point thank you, please tell me why can't we use normal ceiling fan blades for this purpose, they are cheap and made of metal so long lasting and must have been checked in wind tunnels and all for best angle and performance by the companies.

For wooden blades whats the best angle at which i should carve it to better work in low winds?

[ Parent ]



Re: Turdan DCPM 180V 4000RPM 1.5HP Treadmill Motor (3.00 / 0) (#10)
by Flux on Fri May 9th, 2008 at 03:58:54 AM MST
(User Info)

Fans are designed to make wind not convert it to work. The aerofoil surfaces are back to front for use as a prop. Yes they work up to a point but the angles and profiles are wrong for good results.

There are various blade calculators that will give you the angles and widths such as Alton's. I am sure Hugh Piggott has a spreadsheet that does the same thing on his site.
At http://www.scoraigwind.com/

Flux

[ Parent ]



Re: Turdan DCPM 180V 4000RPM 1.5HP Treadmill Motor (3.00 / 0) (#11)
by farhan on Fri May 9th, 2008 at 04:12:05 AM MST
(User Info)

thank you for your help, really appreciate it.

I'll check and read out that website for making wooden blades which i need as you suggested, the PVC one's i made will have to be kept aside then because not good as you said.

Yes fan blades are manufactured to make wind that is right, but i was just thinking its metal and its angel can be changes, i mean it can be reshaped easily, just a thought i know silly question : )

[ Parent ]



Turdan DCPM 180V 4000RPM 1.5HP Treadmill Motor | 21 comments (21 topical, 0 editorial)

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