×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Information on Aero - particularly under body

Information on Aero - particularly under body

Information on Aero - particularly under body

(OP)
Hi all

Can anyone recomend good reading info or advise on down force created by plates etc under car. We are permitted under body protection and provided it does not include any component which can not reasnobly be explained as protection we can have it. By that I mean we can not have air vanes or channels etc, but we can extend a plate backwards from the front air dam (small factory option part) back but we can't extend forward of the air dam.

We can also have protection for the fuel tank and rear diff, so I'm guessing there is a reasonable amount of down force available which I'm not making use of.

Thanks
 

RE: Information on Aero - particularly under body

Shortly I could say that a flat bottom at a ride height of 3 1/2" in the middle of the car and a rake of 1 1/4" over the axles distance, will produce about -100mm of water @ 100mph, in the centre portion of the bottom. All according to my "real life" testing. No rake was zero pressure.
This could compare to a possible raise of pressure without a flat belly pan.
Regards
Goran
 

RE: Information on Aero - particularly under body

Shortly I could say that a flat bottom at a ride height of 3 1/2" in the middle of the car and a rake of 1 1/4" over the axles distance, will produce about 100mm of water @ 100mph, in the centre portion of the bottom. All according to my "real life" testing. No rake was zero pressure.
This could compare to a possible raise of pressure without a flat belly pan.
Regards
Goran
 

RE: Information on Aero - particularly under body

Try Joseph Katz, obvious title.

 

Cheers

Greg Locock

SIG:Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.

RE: Information on Aero - particularly under body

Would you recommend this as a good engineering resource to add to my library? I don't currently have an aero specific resource.

Luck is a difficult thing to verify and therefore should be tested often. - Me

RE: Information on Aero - particularly under body

If you are racing, yes. It is only 35 bucks from Amazon. Katz has a great chapter on wing theory for example, working from 2D flow through to short span airfoils at high AoA with endplates and gurney flaps.


If you are more into production vehicles then Hucho is better. Both are really rather broad surveys, the references are the most useful thing.


 

Cheers

Greg Locock

SIG:Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources