Racing The place to talk about autocrossing, road and drag racing.

spoiler usefullness

Thread Tools
 
  #21 (permalink)  
Old 07-06-2011 | 12:10 AM
bionicdriver's Avatar
Joined: Mar 2008
Posts: 163
Likes: 0
From: Nashville,TN
Default Re: spoiler usefullness

you have no idea about newtons second law of gravity im a pilot its a common law heres what happens
all vehicles create lift some are more aerodynamically engineered better than others. it will create lift bc of the air going underneath the chasis its purpose is to create downforce on the wheel drive to help apply pressure to stabilize the tires to apply pressure to the road . the weight of the engine and the person(s) in the front minimizes the lift at high speeds if the car was going over 155 and didnt have a spoiler the car could possibly lift into the air due to a lack of unbalanced pressure between the two wheels because the wheels are in contact with the ground
 
  #22 (permalink)  
Old 07-06-2011 | 10:25 AM
onehundred80's Avatar
Senior Member
Joined: Apr 2006
Posts: 25,429
Likes: 613
From: Ontario
Default Re: spoiler usefullness

Originally Posted by bionicdriver
hence the air underneath is always going to be at a higher pressure than the air going over any moving object according to newtons second law
Before we start to question your dissertation.

Newtons second law.
The applied net force on an object is equal to the mass of the object multiplied by the acceleration of the object.

F=Ma

Where does this fit in?

I'm just checking on your answer.
 

Last edited by onehundred80; 07-06-2011 at 10:29 AM.
  #23 (permalink)  
Old 07-06-2011 | 10:49 AM
onehundred80's Avatar
Senior Member
Joined: Apr 2006
Posts: 25,429
Likes: 613
From: Ontario
Default Re: spoiler usefullness

Originally Posted by bionicdriver
you have no idea about newtons second law of gravity im a pilot its a common law heres what happens
all vehicles create lift some are more aerodynamically engineered better than others. it will create lift bc of the air going underneath the chasis its purpose is to create downforce on the wheel drive to help apply pressure to stabilize the tires to apply pressure to the road . the weight of the engine and the person(s) in the front minimizes the lift at high speeds if the car was going over 155 and didnt have a spoiler the car could possibly lift into the air due to a lack of unbalanced pressure between the two wheels because the wheels are in contact with the ground
Now you are being specific, you have changed to the law of gravity not motion. To say I know nothing about Newtons Laws is a bit presumptuous on your part. I flew 747's for a living for all you know. I did not but I could have. I flew kites like Benjamin Franklin.
Pilots have to worry about gravity, hopefully.
What is so specific about 155mph and not 154mph say. Is this a magic number that we should be aware of?
What two wheels? Front and back or left and right?
 
  #24 (permalink)  
Old 07-06-2011 | 10:50 AM
JHM2K's Avatar
Senior Member
Joined: Dec 2006
Posts: 6,349
Likes: 14
From: Murfreesboro, TN
Default Re: spoiler usefullness

The last Newton I studied came in a yellow package and promised to be a healthy alternative to candy.

Regarding the wing, I've had both versions on my car. The mechanical spoiler is a neat design trick, and the act of it deploying as I accelerated down the on-ramps would gather the attention of many. Children LOVE it. I've seen folks of all ages making the face, and pointing as I sped away. I would give a wry smile and carry on about my way.

The SRT spoiler gives the car a "balanced" look, adding much-needed visual weight to the rear, at any speed. The SRT wing is a thing of beauty, especially in person.

Some notables:
  • N/A wing (and assembly) is significantly lighter. It also provides but a fraction of the downforce.
  • SRT wing gives the car a much more planted feel at speeds north of 100. While the N/A wing stabilizes the car, the SRT wing glues it to the road.
  • Both are equally annoying to clean, in their own special way.
  • The amount of road dust recirculated on the back of the car is MUCH greater with the SRT wing. A small price to pay for the amount of downforce you gain.
  • The attempts from others to race you at a stop light are cut in half, with the larger wing attached. Seems the chil'ren are paying attention to the SRTs on YouTube...
  • Mileage with the SRT wing drops by 1-2 MPG. I regained that by lowering the car, but still...
  • At speed, there is a slight "buffeting" noise from the wind seeking a path around the wing, that the N/A wing didn't have.
  • The SRT wing adds mass at the very edge of the decklid, making an accidental "slam" a frequent occurrence.
That's about it. Real-world, the SRT wing is worth it's trade-offs. The N/A wing is perfectly adept at keeing your car from doing somersaults at reasonable speeds (<140). The SRT wing gives you assurance in the fact that you're going to be planted at ANY speed.

Now, I'm gonna go buy some Newtons.

Cheers,
 
  #25 (permalink)  
Old 07-09-2011 | 10:31 AM
FUBU's Avatar
Senior Member
Joined: Oct 2009
Posts: 2,829
Likes: 2
From: FL
Default Re: spoiler usefullness

Originally Posted by shortfellow
Hi, I have a standard 2004 CF and I've always wondered about the spoiler. Does this thing perform a usefull purpose and if so what is it's purpose? It looks to me like it would weigh the rear end at high speeds.
With a car that understeers why would I want to weigh the rear?
I'd be happy to disable it if it's just a bad joke. Please advise.
Vince
I'll gladly buy the n/a spoiler motor of you (if it's working that is)..
Also have a SRT wing incl fittings in White. But that will be stoved until winter season.
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Lockhouse
Crossfire Roadster
21
03-20-2024 05:50 PM
Reliableron
Crossfire Roadster
11
10-17-2015 11:19 PM
atdavis2
Cars For Sale - Archive
0
09-21-2015 02:25 PM
RacerXofFL
Cars For Sale - Archive
2
09-15-2015 06:00 PM
davidc90
Troubleshooting & Technical Questions & Modifications
2
09-06-2015 11:37 PM

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 



All times are GMT -4. The time now is 11:28 AM.