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Landracing Forum Home > Tech Information > Technical Discussion (Moderator: Seldom Seen Slim) > Open wheels and aero............
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Author Topic: Open wheels and aero............  (Read 3958 times)
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Sumner
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« Reply #30 on: February 18, 2009, 11:34:20 PM »
Quote from: SPARKY on February 18, 2009, 11:01:20 PM
........and keeping it "nailed" as it went around..............

Smart thinking or were you just too scared to remember to lift  wink.  I think you have been watching some NASCAR (no jokes please Kent  tongue).  Sparky wasn't that video on SCTA or YouTube? 

It is warming up getting closer to sailboat time,

Sum
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Lakester Construction 

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Bville701
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« Reply #31 on: February 18, 2009, 11:37:55 PM »
Once all that snow melts you should have a lake in your front yard.     grin      cheers
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Ryan LeFevers

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« Reply #32 on: February 18, 2009, 11:44:04 PM »
Nope---its on Landspeedracingvideos.com or what ever Marks site is---under free video clips ---spins 2 I think
« Last Edit: February 19, 2009, 12:05:22 AM by SPARKY » Logged
" I am a firm believer in the people. If given the truth, they can be depended upon to meet any national crisis. The great point is to bring them the real facts." A. Lincoln

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Sumner
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« Reply #33 on: February 19, 2009, 12:50:57 AM »
Quote from: SPARKY on February 18, 2009, 11:44:04 PM
Nope---its on Landspeedracingvideos.com or what ever Marks site is---under free video clips ---spins 2 I think

http://www.landspeedracingvideo.com/videos.html

Ryan, the snow is gone except for a few piles on the north side.  3 feet in December, not an inch in January and 6 inches this month.  We have actually been in the 50's a couple days and out sun bathing getting ready for our first big cruise  cool,

Sum
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« Reply #34 on: February 19, 2009, 12:58:01 AM »
It's been in the 60's here and that is still too cold for sun bathing for me.    grin   Enjoy the boat, but don't forget about the lakester   cheers
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Ryan LeFevers

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« Reply #35 on: February 19, 2009, 05:30:34 PM »
I downloaded a paper put together by BMW -- SAE 2006-01-0805 Aerodynamic forces of exposed and enclosed rotating wheels xxxxxx etc...

A lot to read and digest but - One thing that land speed racers know is to run a moon disc or cover on a wheel.  An interesting thing that they found in the wind tunnel besides lower drag was lower lift. 

The numbers on the tire that they tested are - Open wheel - drag 23.6  lift 3.1 --- open wheel with cover drag 21.2 lift 1.7

There were some interesting details on an enclosed wheel as well.  For instance on a BMW z4 they put a 1.3" spoiler at the front lip of the wheel well.  Drag without -10.9 lift -7.3  with spoiler drag -6.7 lift -4.1


Big document - probably take my slow brain a week or 2 to wrap my head around it.
« Last Edit: February 19, 2009, 06:21:30 PM by wolcottjl » Logged
Joel Wolcott
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4-barrel Mike
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« Reply #36 on: February 19, 2009, 07:21:47 PM »
http://www.sae.org/technical/papers/2006-01-0805

I'm just a poor boy.  Let us know if it's worth the $15.00 charge.

Mike
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Mike Kelly - PROUD owner of the V4F that powered the #1931 VGC to a 82.803 mph record in 2008!
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