Howdy,
One of the questions I have is about the Red Head , if you know
the car, it was swoopy, kinda exaggerated coke bottle Corvette shape. I was
wondering about the drag behind the wheel humps, if it would go up due to
turbulence and flow separation behind the hump?
At 04:10 PM 11/5/01, you wrote:
>John, I assume you wanted a real answer to you question and not just chit
>chat. First keep the car on the ground, allow very little space for air to
>get under the car. Air under the car has to be sheared because the air is
>attached to the car and the ground. This eats up quite a bit of power. Next,
>smooth swoopy corners are better than rectangular ones. Rectanglear set up
>bad air flow problems causing drag from interference of the various flows.
>Next minimize the frontal area. Do everything you can to reduce it because
>it is a direct multiplier for power required ( double the area, double the
>power at any given speed). If you can reduce the frontal area by making the
>body lower between the wqheels, it is a good thing to do, as along as the
>panel intersections are not angular corners. Given all that, I wouldn't be
>doing a front driver. Asking the tire contact patch to do to many things:
>forward traction, steering, etc. Anyhoo, good luck...send me a jpg when it
>looks good...
>
>mayf
>
>
>----- Original Message -----
>From: "john robinson" <john@engr.wisc.edu>
>To: "DrMayf" <drmayf@teknett.com>
>Cc: <land-speed@autox.team.net>
>Sent: Monday, November 05, 2001 9:14 AM
>Subject: Re: What's Up?
>
>
> > I'm here, been putting pixel to screen, drawing my streamliner.... front
> > wheel drive front wheel steer staggered rear wheels....right now about 7
> > ft2 frontal area.... trying to get it lower....which do you think is
> > better, slightly rounded body panels but still a rectangle? or swoopy
> > "trout" looking? is lowering the body between the wheels and making wheel
> > fairings better from a C/D standpoint (ala "Red Head" ) or shaped like the
> > Feuling with a rectangled squarish shape?
> >
> > John Robinson, Mechanician
> > Mechanical Engineering University of Wisconsin
> > 1513 University Ave.
> > Madison, Wi. 53706
> > 608-262-3606
> > FAX 608-265-2316
> > Current World Land Speed Record Holder
> > Bonneville Salt Flats
> > H/GCC 92 cu.in. 1980 Dodge Colt
> > 131.333 MPH set 1995
> > 136.666 MPH set 1996
> > 140.292 MPH set 2000
> > 144.396 MPH set 2000
> > MPS-PG 441 c.c. 1967 BSA Victor Motorcycle
> > 95.193 MPH set 2001
> >
> >
John Robinson, Mechanician
Mechanical Engineering University of Wisconsin
1513 University Ave.
Madison, Wi. 53706
608-262-3606
FAX 608-265-2316
Current World Land Speed Record Holder
Bonneville Salt Flats
H/GCC 92 cu.in. 1980 Dodge Colt
131.333 MPH set 1995
136.666 MPH set 1996
140.292 MPH set 2000
144.396 MPH set 2000
MPS-PG 441 c.c. 1967 BSA Victor Motorcycle
95.193 MPH set 2001
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