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Old 08-05-2004, 10:09 PM   #1
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Default New Idea

I thought about designing a rear defuser for RC cars that controls the air flow under the car, improves the downforce, and makes cornering better. This should work on a rc car the same way it works on a real race car. If I make one should I construct it from thin light weight metal or graphite?
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Old 08-05-2004, 10:16 PM   #2
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Thin carbon fiber. It would look cooler.
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Old 08-05-2004, 10:27 PM   #3
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I would make it out of lexan. Cheap, lightweight and easy to work with.
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Old 08-05-2004, 11:53 PM   #4
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Wow, what a great idea!

Too bad IFMAR and ROAR Rules outlaw ground effects...
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Old 08-06-2004, 12:08 AM   #5
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Back in the day Dahms used to make underbodies for oval pan cars with ground effects built in. Also Technacraft used to make a rear pod for the 10L with a bolt on lexan diffuser. Finally, Compositecraft tried making pan car chassis with angled cutouts on the sides to get ground effects. Don't think any of them ever worked, but still a cool idea.

-James
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Old 08-06-2004, 01:14 AM   #6
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Quote:
Originally posted by Evicerator
Wow, what a great idea!

Too bad IFMAR and ROAR Rules outlaw ground effects...
Insert sarcastic post here.
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Old 08-06-2004, 01:14 AM   #7
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Default Re: New Idea

Quote:
Originally posted by nitrous36
I thought about designing a rear defuser for RC cars that controls the air flow under the car, improves the downforce, and makes cornering better. This should work on a rc car the same way it works on a real race car. If I make one should I construct it from thin light weight metal or graphite?
If you construct it, please post a pic. We would all love to see it.
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Old 08-06-2004, 01:21 AM   #8
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Quote:
Originally posted by Neil Rabara
Insert sarcastic post here.
Insert Flame, Rant or Off Topic Argument here after reading ONLY the first few words of the above post.

Finish with "nuff said" or "My 2 cents".
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Old 08-06-2004, 01:53 AM   #9
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Tamiya also used such devices on its F1's... and I'm also pretty sure it's sometimes done on 5th scalers...

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Old 08-06-2004, 02:00 AM   #10
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Quote:
Originally posted by Lonestar
Tamiya also used such devices on its F1's... and I'm also pretty sure it's sometimes done on 5th scalers...

Later
Paul
It's current F201 is virtually flat with no holes on the bottom. That and the body is molded so close to it that there is little room.
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Old 08-06-2004, 11:45 AM   #11
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Quote:
Originally posted by Evicerator
Wow, what a great idea!

Too bad IFMAR and ROAR Rules outlaw ground effects...
smart ass
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Old 08-06-2004, 11:54 AM   #12
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Quote:
Originally posted by Evicerator
Wow, what a great idea!

Too bad IFMAR and ROAR Rules outlaw ground effects...
You should ask Erik what gear ratio you should use with delrin ground effects
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Old 08-06-2004, 11:58 AM   #13
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I thought about using metal which would be hard and durable but when you hit a bump or contact the ground it may through sparks which would look cool. Graphite would be nice and it would look better but if you hit a bump or contact the ground hard enough it could crack or even shatter espacially if someone rear ended you. I thought about several different ways to mount it and every chassis is different I would have to make one specific to every chassis. It would be easier to just make a whole chassis with a diffuser build into the design as part of it but that would be like making a whole nother car all together. If anyone have any ideas on how to mounting one so that it will fit universaly to any chassis post it here.
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Old 08-06-2004, 01:17 PM   #14
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Since an RC car is so small and not going that fast-you would want the difuser to not be very high nor very wide. I would tink you could get away with two of them. ONe under each rear suspension arm. Again-you dont want a big tall difuser-it would servo no purpose but eye candy. I bet 2 inches long, 1/8" tall and 1" wide wuld be a good place to start.

Just dont be disspointed if they have no effect at all!!
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Old 08-06-2004, 01:28 PM   #15
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Also-your time may be much better spent designing a closed body thats got wheel wells to stop the turbulent air that comes off the wheels and then real open louvers over the front wheels (thats free downforce) and then a flat smooth bottom over the entire bottom of the car.
With a sealed flat bottom car-the air would proaby go under the car faster than the top-therefore the downforce from the top of the body would work much more effeiciently and you probably would not need a difuser.

Of course-heres where everyone burns me down-the motor, esc and cells will get Hotter than normal.

And yes my buddy Evicerator-its all illegal!! and yes-touch one thing on the track and games over.
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