http://blog.autospeed.com/2003/11/02/a-range-of-tech-tips/ AutoSpeed's Blog. Opinion and Auto News Comment Thu, 12 Nov 2009 06:48:43 +1100 http://wordpress.org/?v=2.8.5 hourly 1 http://blog.autospeed.com/2003/11/02/a-range-of-tech-tips/comment-page-1/#comment-4402 Julian Edgar Mon, 29 Oct 2007 21:35:44 +0000 http://blog.autospeed.com/2003/11/02/a-range-of-tech-tips/#comment-4402 Yes, as we covered at http://www.autospeed.com/cms/article.html?&A=0491 Yes, as we covered at http://www.autospeed.com/cms/article.html?&A=0491

]]> http://blog.autospeed.com/2003/11/02/a-range-of-tech-tips/comment-page-1/#comment-4401 Mal Mon, 29 Oct 2007 21:20:18 +0000 http://blog.autospeed.com/2003/11/02/a-range-of-tech-tips/#comment-4401 Bends cause friction loss & turbulence. Tighter bends cause more turbulence than shallower bends. I don't have time to try this experiment but air conditioning ducts that have tight bends contain turning vains to reduce turbulence. If you were to take a tight radius bend and cut 2 longitudinal slots opposite each other in the bend along the centre axis (the slots will look like a right angle with a radiused corner) and inserted a piece of sheet metal (some tin can) throught the slots and silicone it in place and then push/suck air through it you may find there will be less pressure drop. As I can't attach a pic to this blog I can e-mail a pic to describe what I'm taking about. Bends cause friction loss & turbulence. Tighter bends cause more turbulence than shallower bends.
I don’t have time to try this experiment but air conditioning ducts that have tight bends contain turning vains to reduce turbulence. If you were to take a tight radius bend and cut 2 longitudinal slots opposite each other in the bend along the centre axis (the slots will look like a right angle with a radiused corner) and inserted a piece of sheet metal (some tin can) throught the slots and silicone it in place and then push/suck air through it you may find there will be less pressure drop.
As I can’t attach a pic to this blog I can e-mail a pic to describe what I’m taking about.

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