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02-13-2010, 11:31 AM
Replies: 95
Views: 6,938
Posted By claykos

Going out the sides can be preferable to going...

Going out the sides can be preferable to going out the top - however, going out the sides is often not practical in a production based car and going out the top is preferable to going out the bottom...
02-11-2010, 04:02 PM
Replies: 95
Views: 6,938
Posted By claykos

They are part of a data acquisition system...

They are part of a data acquisition system (usually Motec or similar). It's a linear potentiometer that you mount on the shock. With the data you will also have speed, so you can correlate speed to...
02-11-2010, 03:01 PM
Replies: 95
Views: 6,938
Posted By claykos

That was pretty much my point too - unfortunately...

That was pretty much my point too - unfortunately my example caused the thread to go off on a tangent. Aero is complicated and there really isn't a hope to REALLY optimize it for 99.9% of people.
...
02-10-2010, 04:07 PM
Replies: 95
Views: 6,938
Posted By claykos

I believe it was this airfoil ...

I believe it was this airfoil
http://www.worldofkrauss.com/foils/1671

Efficiency is related to aspect ratio - the formula for Cd has a 1/AR term in it. The Cp and lift curves you see in the...
02-10-2010, 01:02 PM
Replies: 95
Views: 6,938
Posted By claykos

At constant speed glide ratio and L/D are the...

At constant speed glide ratio and L/D are the same.

Changing just L is not the same thing as changing L/D. Maybe instead of a 10% increase in lift, there was a smaller change in drag and a smaller...
02-10-2010, 12:46 PM
Replies: 95
Views: 6,938
Posted By claykos

Your reference showed similar results though -...

Your reference showed similar results though - loss of performance with the leading edge tape!

And I think I'm done with this thread now...
02-10-2010, 11:52 AM
Replies: 95
Views: 6,938
Posted By claykos

The experiment I'm talking about was with scotch...

The experiment I'm talking about was with scotch tape. The experiments were performed by a friend/coworker - I literally listened to the results yesterday - I'm not talking about internet myths or...
02-10-2010, 12:56 AM
Replies: 95
Views: 6,938
Posted By claykos

That's why I said as big a wing AND a splitter as...

That's why I said as big a wing AND a splitter as practical - I said you couldn't have too much downforce, not taht you couldn't have too much rear downforce.

Also thought I would share an...
02-08-2010, 11:11 PM
Replies: 95
Views: 6,938
Posted By claykos

No worries - growth proportional to a variable...

No worries - growth proportional to a variable squared, or cubed, etc is actually algebraic or polynomial, but now we're splitting hairs. :D

Not to turn this into a math semantics seminar...
02-08-2010, 09:35 PM
Replies: 95
Views: 6,938
Posted By claykos

Jack's post has a lot of good info. On any...

Jack's post has a lot of good info. On any production type car you simply aren't going to be able to have too much downforce. Run as big a wing and splitter as practical. Any additional drag should...
02-08-2010, 11:07 AM
Replies: 95
Views: 6,938
Posted By claykos

There isn't a simple math formula to answer that...

There isn't a simple math formula to answer that question - you could need to test it...but IMO you can't have too big a wing on our type of cars (assuming you have a reasonable amount of power). You...
02-08-2010, 10:55 AM
Replies: 95
Views: 6,938
Posted By claykos

Correct. Aerodynamics is quite complicated -...

Correct. Aerodynamics is quite complicated - especially on a car where the flow is very dirty coming onto the wing. Small aspect ratio, larger aspect, profile, chord length, Reynolds number, etc all...
02-07-2010, 05:25 PM
Replies: 95
Views: 6,938
Posted By claykos

Wings are generally rated by a coefficient of...

Wings are generally rated by a coefficient of lift (Cl) and a coefficient of drag (Cd). The lift or drag force is .5*C(d or l)*density*area*velocity^2. So if 2 wings are identical - meaning the same...
Showing results 1 to 13 of 13


 
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