Wings and downforce questions..
02-20-02 | 02:49 PM
#26
Senior Member
Joined: Feb 2001
Posts: 418
Likes: 0
From: West Covina, CA, USA
there was a video where they tested the different GT style wings. It does make a difference, on most turns the driver could start accelerating earlier when exiting the turn. As for drag, they did notice a decrease in top speed but the cornering speed makes up for it.
and I don't think spoilers work at speeds 150+....
on the subject of GT wings...why do the civics have GT wings?? why would they want to increase the inherent understeering characteristic!?!?!?!
David
and I don't think spoilers work at speeds 150+....
on the subject of GT wings...why do the civics have GT wings?? why would they want to increase the inherent understeering characteristic!?!?!?!
David
02-20-02 | 03:19 PM
#27
Senior Member
Joined: Mar 2001
Posts: 514
Likes: 0
From: Tulsa, OK
Well back to the original question....
"what is the overall best setting for street/highway use? Or is it really impossible to get some functionality out of these aero devices unless you're on the track?"
No wing, and there is really no function of an aero device like a huge wing unless you are on the track.
"what is the overall best setting for street/highway use? Or is it really impossible to get some functionality out of these aero devices unless you're on the track?"
No wing, and there is really no function of an aero device like a huge wing unless you are on the track.
02-20-02 | 07:25 PM
#28
Passenger
Posts: n/a
yes wings are really cool but on a stock car that normaly does not go over a 100 mph on the street the wing does not help. the best airodynamics are the undercar kind as used by many racing companies like that of farrari. How many of them do you see with a big ugly wing? yes i have a civic and it is fun to drive but the need for a wing is non-existent. but i am planning on testing a huge peice of plywood strapped to the top of my car to see if my downforce is increased at speeds above 45. muahahahahahha
02-28-02 | 11:57 PM
#30
Passenger
Posts: n/a
the down force has increased in the 35 to 40 range quite a bit and i am still impressed with the handling capabilities over 100 mph. the special wing supports are tested to speeds greater then that of NASCAR cars for extra safety. the high heat resistant wheel covers also help the drag of the car i noticed a .34 drop over stock. i know that with more testing i can start mass producing wings for race and street use. also the paint is a super high gloss that reduces air friction to enable the car to reach speeds of above 200 mph and with with the help of the front air foil (not pictured) that helps reduce understear in this front wheel drive configuration the car is awsome on the salt flats.
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fc3s-ty (03-31-22)
03-01-02 | 04:27 AM
#31
Full Member
Joined: Mar 2001
Posts: 100
Likes: 1
From: St. Louis
Your spoiler design, I would have to say, kicks major ***. Have you tested it during spins? Normally a spoiler doesn't help you in spins unless you're doing more than about 724 mph, but yours probably would.
Oh, did you have to get a building permit?
Oh, did you have to get a building permit?
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fc3s-ty (03-31-22)
03-01-02 | 10:56 PM
#32
Passenger
Posts: n/a
well the spoiler is great in spins because it has a hydralic rudder effect when the computer sences loss of traction. also the car does a 16.2 in the 1/4 for those who care and reaches a top speed of about 380 mph because of the HF transmission that i installed for the long range pull. and no building permits required but NASA is interested in my prototype
03-02-02 | 10:34 AM
#33
Rotary Master
Joined: Feb 2001
Posts: 356
Likes: 1
From: Somewhere
I have the 99 spoiler and you can definitly tell the difference, I had to put the chin spoiler on because the front end was getting too loose. You can feel the effects as low as 45 on the second position. The car feels more stable at 70+
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fc3s-ty (03-31-22)
12-01-04 | 12:28 AM
#34
1993 RX7 R1
Joined: Jul 2001
Posts: 1,266
Likes: 0
From: SoCal
Originally Posted by maxcooper
Aerodynamic Coefficients of (1993-)1995 Mazda RX-7
Baseline RX-7 RX-7 R2(R1)
Cd, drag coeff. 0.29 0.31
Clf, lift coeff FRONT 0.16 0.10
Clf, lift coeff REAR 0.08 0.08
This leads me to believe that the front lip spoiler reduces lift in front, and that the stock (U.S. model) rear wing is nothing but eye candy.
Baseline RX-7 RX-7 R2(R1)
Cd, drag coeff. 0.29 0.31
Clf, lift coeff FRONT 0.16 0.10
Clf, lift coeff REAR 0.08 0.08
This leads me to believe that the front lip spoiler reduces lift in front, and that the stock (U.S. model) rear wing is nothing but eye candy.
The coefficient of lift for the front and the rear are not usually independent of each other. As a matter of fact, they may be inversely related. Certainly, it is entirely possible that, as the coefficient of lift for the front decreases, the coefficient of lift for the rear can suffer and thus increase.
In the case of the above numbers for the FD, I would think that the rear spoiler is adding some downforce and therefore mainitaining the same coefficient of lift for the rear when the front spoiler is tending to increase it(the coefficient of lift for the rear).
However, all this discussion is moot since the real answer lies with wind tunnel testing(It would require determination of coefficient of lift for the rear using the R1 rear spoiler in combination with and without the front spoiler)
BTW, the reason why I dug up this thread was because I was doing a search for a good aerodynamic wing. The search turned up many useless threads. This thread appears to be the only one with any useful info although it, too, has many posts which have false information like so many other forum threads... but what else is new.
Last edited by Mr. Stock; 12-01-04 at 12:33 AM.
12-01-04 | 01:40 AM
#36
Full Member
Joined: Aug 2004
Posts: 128
Likes: 0
From: Seattle
God, every time someone posts a thread like this there is SO much misinformation, and so many self-proclaimed know-it-alls and experts, that really are clueless, it boggles the mind. I realize this is an old thread, but since I didn't post it - here is an excellent link to a great beginner level article on aerodynamics that anyone unfamiliar with the subject should read in its entirety - trust me, you'll thank me later!
http://www.gmecca.com/byorc/dtipsaerodynamics.html
http://www.gmecca.com/byorc/dtipsaerodynamics.html
12-01-04 | 02:45 AM
#37
Wow, great introductory article there, plan9. How did you learn about aero stuff? Could you point me to some good information regarding underbody channels, front lip spoilers and / or hood vents?
-s-
-s-
12-01-04 | 10:35 AM
#38
1993 RX7 R1
Joined: Jul 2001
Posts: 1,266
Likes: 0
From: SoCal
Originally Posted by plan9
For people who are interested in little more in-dpth learning, I suggest
"Competition Car Downforce"
http://www.amazon.com/exec/obidos/tg...glance&s=books
It's an easy to read book and covers pretty much everything about aerodynamics. It also has a reference section for those interested in the mathematics of downforce.
Last edited by Mr. Stock; 12-01-04 at 10:38 AM.
