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A Wind in the Willows (or Vice Versa)

Posted December 17, 2007 8:24 AM

Energy has been harnessed from the wind for thousands of years, and while high-tech solutions inform current versions of wind power, a simple, natural material is lending itself to optimal turbine blade design: wood. This natural, renewable fibre-reinforced composite offers superior fatigue and strength-to-cost properties. In the U.K., wind turbine blades constructed of Finnish birch have experienced 20 years of problem-free service; sustainable bamboo is being pressed into blade service in China. Savonius turbines with bamboo-bladed rotors show slightly lower rotational speeds than with metal blades but incur lower manufacturing and life-cycle assessment costs. Can natural materials make other inroads in renewable energy system design?

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Guru
Popular Science - Weaponology - New Member United Kingdom - Member - New Member

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#1

Re: A Wind in the Willows (or Vice Versa)

12/17/2007 11:24 AM

This is hardy surprising as the structure of trees and grasses has been tuned by the wind to withstand it's ravages over thousands of years of evolution.

It's about as surprising as the fact that fish can swim...

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Guru
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#2
In reply to #1

Re: A Wind in the Willows (or Vice Versa)

12/18/2007 8:35 AM

Concur on the surprise value; appears to be another example of something so obvious on the face of it that it just totally escaped the notice of all those design engineers for all those years. Plus you can't patent wood, so it's initially more profitable to come up with an alloy or a polymer to use instead.

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#3

Re: A Wind in the Willows (or Vice Versa)

12/18/2007 5:02 PM

been using wood to make airplane propellers for years and they seem to hold up very well. (aside from striking the ground) Metal props are not as forgiving as a nick not dressed will most of the time result in the metal prop failing at a later date. Harmonics?

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Guru

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Re: A Wind in the Willows (or Vice Versa)

12/25/2007 5:43 PM

Agreed to above. However, this is an issue that I speak to as often as possible. I am continuously encouraging those with whom I speak to take the knowledge they have today and revisit some of the long forgotten or overlooked issues of yore.

The screw, lever, wheel and inclined plane - Now lets make 'em out of unobtanium polarize 'em super cool 'em and run a phase shifting 20 x 310V through em' at 7 x25-10A and see if we cant catch a smarter mouse.

I hope we continue to take new technologies and apply them to the most very basic devices, problems and solutions science and life offer; being not afraid of the elementary nature of childish curiosity.

After all, what greater joy is there than that of prolonged childhood?

cr3

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