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Old 06-08-2006, 12:35 PM   #91
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Quote:
Originally Posted by rayhuang
There are so many simple things you could try without the need for windtunnels or new bodies. Heres a short list of fun and educational things you could try with the bodies you have now:

-winglets on the front corners to add downforce
-dual element rear wing
-aero devices INSIDE the body, like winglets behind front and rear tires to make use of turbulence behind tires for downforce
-pitch body
-move whole body forward and back
-move wing forward or back
-front splitter (dont hit a marshall please)
-front wing on hood
-enclose parts of interior of body (like canopy)
-vortex generators on hood or roof
-vertical splitter on rear window
-gurney strip on end of roof
-slots above tires in front (or rear).
-cut body down middle and make it get wider towards rear or narrower
-a thousand different shape wings and different materials

Establishing as many constants as you can, a radar gun and a laptimng system will be the greatest challenges.
Those are some really creative suggestions. I might try running a few of them through some CFD analysis (see thread) to get an idea of what effect they might have. Theoretically, at least.
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Old 06-08-2006, 01:26 PM   #92
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I have been kicking around the idea for some time about building a small scale wind tunnel (I'm retired and a stay at home dad and I get real bored some days.) This plus the LMP post just makes me want to build it even more. A few sheets of plexiglass, a couple of scales and an old leaf blower, just need a way to measure the wind speed.
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Old 06-11-2006, 06:35 AM   #93
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Did anyone else find it amusing that the Chaparral 2J "sucker" CanAm car that Dale posted earlier was sponsored by GE's Lexan?

Aero is important in any form of racing. Different bodies do have different "feels" on the track. Oh, and I'll take one of those T530 bodies in 190mm if you have a chance, Dale.



I'm in for some of those 235mm bodies, too. I have an original PF Peugeot and P35 in 10th that I refuse to let go of, "just in case." Just give me a reason to dust off my old Twister Cyclone...
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Old 08-17-2006, 09:25 PM   #94
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Ok, so lately I have been just sitting around thinking and IF I were to build a wind tunnel, where would I get the smoke?
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Old 08-17-2006, 10:08 PM   #95
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Quote:
Originally Posted by KarpetRacer93
Ok, so lately I have been just sitting around thinking and IF I were to build a wind tunnel, where would I get the smoke?
...Uhh from the Bong...
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Old 08-17-2006, 11:22 PM   #96
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Quote:
Originally Posted by xxxkat
...Uhh from the Bong...
the "shotgun" technique works pretty well
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Old 08-18-2006, 06:17 AM   #97
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You can buy smoke bombs from fireworks stands for about $0.25 a piece.
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Old 08-18-2006, 10:19 AM   #98
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Quote:
Originally Posted by SammyXp
You can buy smoke bombs from fireworks stands for about $0.25 a piece.
Fireworks are illegal in NY.
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Old 08-18-2006, 10:28 AM   #99
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Dry ice maybe. Don't know how expensive that is though.
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Old 08-18-2006, 11:00 AM   #100
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cigarete maybe?
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Old 08-18-2006, 01:08 PM   #101
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You could try this ...not sure how to activate the smoke however...

http://www.ntxtools.com/network-tool...p-0716-uv.html


As far as measuring wind speed you could get yourself a pitot tube or static pressure tips and get yourself some hvac manometers or anemometers and you can calculate out air velocity.

Try this company.... http://www.dwyer-inst.com/

They offer low cost instruments for hvac applications.
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Old 08-18-2006, 02:10 PM   #102
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which would work better a true airfoil inverted to produce downforce. a simple rear wing like those that come with most touring cars or a simple spoiler like a nascar style body. Then if none actually produce downforce in a useful amount, Which would produce the greatest amount of drag? Then how do i take this knowledge and apply it to my car?
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Old 08-18-2006, 10:52 PM   #103
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Quote:
Originally Posted by KarpetRacer93
Fireworks are illegal in NY.
They are'nt explosives and there fore not illegal. You can find some at industrial/commercial a/c repaire shops. They use the smoke bombs to check for leaks in the central a/c duct work.

There are other ways to produce smoke just do a search on google for smoke machines.
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Old 08-19-2006, 09:22 AM   #104
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Quote:
Originally Posted by speedxl
There are other ways to produce smoke just do a search on google for smoke machines.
...Bong, Power shooter...
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Old 08-20-2006, 12:03 AM   #105
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I've been experimenting for some time with Aero packages on different chassis / body combinations...
Tamiya Rover Mini cooper (Honestly!)
Losi XXX's
Associated TC4

Ive tried the standard Tamia body on the Cooper and the HPI version and the HPI version is much better.
I also tried a rear wing on the Cooper body but that didnt work very well and just made the car over steer.
The Losi and TC4 chassis's have had several body shapes put 'over' them, Lotus Elise, GT40, BMW and a Ford Taurus... of all the bodies, the Taurus seems to work the best! . I've tried several rear wings and either the HPI 'scoop' rear wing or a home made (formed from 1/4" ply) inverted aerofoil @ 15 degrees seems to work best on all the bodyshells.
I also did a little experiment with front splitters under the front of bodyshells but that didnt work very well on any bodyshell, mainly due to the fact it kept getting bent (aluminium plate) and i couldnt get consistant results.
One thing i DID find worked VERY well and made all the cars stick to the road like glue was a rear upswept undertray similar to an F1 car, sucking the air out from under the rear of the car . This did however give me another problem to solve, it sucked any dirt / grit / debris off the track and inside the bodyshell!.
One other thing i found worked well, put the bodyshell 'down' as far as you can on its mount posts and then trim the bottom of the body till it doesnt drag on the ground.
I would love to try my 'variations' in a wind tunnel just to see how much difference they make 'scientifically'

Just my $0.10 worth....
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