Thread: tuft testing
View Single Post
Old 09-26-2010, 07:00 PM   #5 (permalink)
Varn
Do more with less
 
Join Date: Jul 2010
Location: North Eastern Missouri
Posts: 911

OD - '05 Ford Econoline
90 day: 18.64 mpg (US)

Joetta - '86 Volkswagen Jetta Turbo Oil Burner
TEAM VW AUDI Group
90 day: 49.71 mpg (US)

Benzilla - '85 Mercedes Benz 300D
90 day: 28.08 mpg (US)
Thanks: 58
Thanked 166 Times in 104 Posts
Hi Otto,
I did notice that the wand when held down near the front wheel gave me a lot of swirling. I couldn't observe the any lower than about the top half.

There is a short smooth belly pan from the grill at the bottom to the radiator.

A couple of weeks ago I had removed the rear mud deflectors and screwed them in front of the front wheel. I thought that they might work out perfectly but they were tilted as the front of the body curls around underneath more than the shape does further back. Also they were only half as wide as the tire.

I am in the process of fabricating a custom wheel deflector. I used 9 gauge wire and bent and welded it into shape. I am hand sewing some dacron fabric onto it. I will then shrink the fabric a bit with heat then lay on some composite cloth and wet it out with epoxy. The wire and fabric can be removed after it cures.

I have taken some photos of the frame and will try and document it. I realize that these are not the photos that you are asking about. I might suggest that pictures of air flow around my front tires may not be relevant to your car.

It truly has not been tuft tested but the shape makes some sense. I may create a rubber dam under the front.
EDIT
wire only:


Here is the form that I am going to carbon.


Quote:
Originally Posted by Otto View Post
Any chance you could do some pics of tufts under the car nose, esp. to see airflow to and around the front wheels?

I'm especially curious about the angle of incidence of flow to and around the wheels.
__________________
"A man is not finished when he is defeated. He is finished when he quits."
Richard M. Nixon


"The reward of suffering is experience."
Harry S. Truman

“There's no way to rule innocent men. The only power any government has is the power to crack down on criminals. Well, when there aren't enough criminals, one makes them. One declares so many things to be a crime that it becomes impossible for men to live without breaking laws.”
Ayn Rand

Last edited by Varn; 09-26-2010 at 07:17 PM..
  Reply With Quote