PPRuNe Forums - View Single Post - Proposed wind farm impacts Cobden ALA future
Old 1st Dec 2017, 05:43
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Flying Binghi
 
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Originally Posted by layman
Flying Binghi

blaming towers 9 kilometres away is a bit of a stretch.

Maximum leeward windbreak effect is usually calculated at 30 times the height of the highest tree (and that is for conifers with around 40-60% density - much denser than 3 rotating blades)

The Gunning towers are 80 metres + 1/2 the rotor (49.5) metres gives effect distance of approximately 3 or so kilometres - well short of the 9 kilometres claimed.
I didn't realise trees had rotating branches..

Layman, next time yer taking off behind a pax jet is it the wind break effect of the wings that are of concern or is it what comes off the end of the wings ?

For the effect have a look-see at the piccys in this link: https://stopthesethings.com/2014/05/...-south-dakota/





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