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Re: [GMCnet] Keeping it Real, 8 to 10 mpg [message #172699 is a reply to message #172646]

Sat, 09 June 2012 10:57

mike miller

Messages: 3576
Registered: February 2004
Location: Hillsboro, Oregon

Karma:

Senior Member

Robert Mueller wrote on Fri, 08 June 2012 18:03

...
A GMC doesn't have as much "stuff" hanging off the body shell but there's
enough to cause a fair amount of turbulence when one considers: the mirrors,
wind wings (if you installed them), roof A/C(s), TV antenna, satellite
antenna, Fantastic Fan vents, pods, luggage rail / ladder, etc. ...

Rob,

From what I understand, a small amount of turbulence actually REDUCES drag.... as long as it is in the right places. That is why golf balls have dimples.

There are people who make there living figuring out stuff like this... and I am not one of them! But to get an idea Google "vortex generators" and look for links that DO NOT have to do with aircraft.

Here is a link to a PDF from Mitsubishi motors... no I didn't read it, I looked at the pictures!

< http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=11&ved=0CJIBEBYwCg&url=http%3A%2F%2Fwww.mitsubishi-motors.com %2Fcorporate%2Fabout_us%2Ftechnology%2Freview%2Fe%2Fpdf%2F2004%2F16E_03.pdf&ei=aWvTT6PbPKre2AWxuY2kDw&usg=AFQjCNHArFCd4qeAHReUfG5fPxrlj7fL8w>

Anyway... From my prior readings, when bored... not from education or experience: With any shape, as long as you know what direction the airflow is coming from (like the front) you should be able to crate a small amount of turbulence where the pressures changes from high to low. This turbulence should form a boundary layer of air that expands (air does that) to make the shape seem "slipperier" to the air. Lowering drag.

But I MIGHT be full of something... like hot (turbulent) air!

Mike Miller -- Hillsboro, OR -- on the Black list
(#2)`78 23' Birchaven Rear Bath -- (#3)`77 23' Birchaven Side Bath
More Sidekicks than GMC's and a late model Malibu called 'Boo' http://m000035.blogspot.com

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[Message index]

		[GMCnet] Keeping it Real, 8 to 10 mpg By: Mr ERFisher on Thu, 07 June 2012 16:38
		Re: [GMCnet] Keeping it Real, 8 to 10 mpg By: Harry on Thu, 07 June 2012 16:43
		Re: [GMCnet] Keeping it Real, 8 to 10 mpg By: kelvin on Thu, 07 June 2012 16:50
		Re: [GMCnet] Keeping it Real, 8 to 10 mpg By: george beck on Thu, 07 June 2012 17:31
		Re: [GMCnet] Keeping it Real, 8 to 10 mpg By: ljdavick on Thu, 07 June 2012 17:36
		Re: [GMCnet] Keeping it Real, 8 to 10 mpg By: jhbridges on Thu, 07 June 2012 18:39
		Re: [GMCnet] Keeping it Real, 8 to 10 mpg By: Harry on Thu, 07 June 2012 18:45
		Re: [GMCnet] Keeping it Real, 8 to 10 mpg By: George Beckman on Thu, 07 June 2012 19:09
		Re: [GMCnet] Keeping it Real, 8 to 10 mpg By: RF_Burns on Thu, 07 June 2012 17:05
		Re: [GMCnet] Keeping it Real, 8 to 10 mpg By: kelvin on Thu, 07 June 2012 17:08
		Re: [GMCnet] Keeping it Real, 8 to 10 mpg By: ljdavick on Thu, 07 June 2012 17:41
		Re: [GMCnet] Keeping it Real, 8 to 10 mpg By: USAussie on Thu, 07 June 2012 18:56
		Re: [GMCnet] Keeping it Real, 8 to 10 mpg By: stick miller on Thu, 07 June 2012 19:12
		Re: [GMCnet] Keeping it Real, 8 to 10 mpg By: mannystrans on Thu, 07 June 2012 23:19
		Re: [GMCnet] Keeping it Real, 8 to 10 mpg By: hnielsen2 on Thu, 07 June 2012 19:46
		Re: [GMCnet] Keeping it Real, 8 to 10 mpg By: Harry on Thu, 07 June 2012 23:08
		Re: [GMCnet] Keeping it Real, 8 to 10 mpg By: Chr$ on Fri, 08 June 2012 00:58
		Re: [GMCnet] Keeping it Real, 8 to 10 mpg By: larry.whisler on Fri, 08 June 2012 08:28
		Re: [GMCnet] Keeping it Real, 8 to 10 mpg By: Steven Ferguson on Fri, 08 June 2012 07:15
		Re: [GMCnet] Keeping it Real, 8 to 10 mpg By: Byron Songer on Fri, 08 June 2012 08:09
		Re: [GMCnet] Keeping it Real, 8 to 10 mpg By: kelvin on Fri, 08 June 2012 10:53
		Re: [GMCnet] Keeping it Real, 8 to 10 mpg By: roy1 on Fri, 08 June 2012 12:13
		Re: [GMCnet] Keeping it Real, 8 to 10 mpg By: Jim Galbavy on Fri, 08 June 2012 17:09
		Re: [GMCnet] Keeping it Real, 8 to 10 mpg By: kelvin on Fri, 08 June 2012 17:19
		Re: [GMCnet] Keeping it Real, 8 to 10 mpg By: jaholland on Fri, 08 June 2012 18:46
		Re: [GMCnet] Keeping it Real, 8 to 10 mpg By: Ray Erspamer on Fri, 08 June 2012 21:04
		Re: [GMCnet] Keeping it Real, 8 to 10 mpg By: USAussie on Fri, 08 June 2012 20:03
		Re: [GMCnet] Keeping it Real, 8 to 10 mpg By: mike miller on Sat, 09 June 2012 10:57
		Re: [GMCnet] Keeping it Real, 8 to 10 mpg By: mike miller on Sat, 09 June 2012 11:01
		Re: [GMCnet] Keeping it Real, 8 to 10 mpg By: USAussie on Sat, 09 June 2012 19:39
		Re: [GMCnet] Keeping it Real, 8 to 10 mpg By: mike miller on Sat, 09 June 2012 20:01
		Re: [GMCnet] Keeping it Real, 8 to 10 mpg By: USAussie on Sat, 09 June 2012 20:49
		Re: [GMCnet] Keeping it Real, 8 to 10 mpg By: mike miller on Sun, 10 June 2012 00:31
		Re: [GMCnet] Keeping it Real, 8 to 10 mpg By: USAussie on Sun, 10 June 2012 01:52
		Re: [GMCnet] Keeping it Real, 8 to 10 mpg By: Kudzu on Fri, 08 June 2012 21:26
		Re: [GMCnet] Keeping it Real, 8 to 10 mpg By: Ray Erspamer on Fri, 08 June 2012 21:29
		Re: [GMCnet] Keeping it Real, 8 to 10 mpg By: JohnL455 on Fri, 08 June 2012 22:43

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