[DeTomaso] Pantera Aerodynamics

[Dave Londry]

I don't see anyone trying to help out with the static pressure 
measurement Michael,
so maybe I can kick off some responses.

The static pressure would be measured by placing the measurement inlet 
at 90 degrees to the airflow direction.
This isn't too helpful when you don't know the airflow direction.
If you try to stop the airflow at the inlet by covering it with foam, I 
think you'll be creating a local pressure increase and measuring that.
If you had a surplus pitot-static tube laying around and a way to 
manoeuvre it,
you could get it pointed in the direction of max airspeed and then take 
the static reading.

Maybe more useful if you measure the pitot pressure at a point
(so changing the direction of your inlet until it you find the max, 
which will be pointed directly int the flow)
and then you measure the pitot pressure in the free airstream.

The difference between the two should be the local static pressure, because
static pressure + dynamic pressure = total pressure (a constant)

Now - maybe somebody who knows something will give you a useful answer.
dave


-- 
Dave Londry
Embedded Spaces Inc. (ESI)

michael frazier wrote:
> Ken wrote:  I suspect that you are comparing apples to oranges here.  I think the hood raises because of low pressure above the hood's top surface and the wiper raise because of the air flow past them.
>   I agree.  The wipers are right in a high speed flow area, kinda 45 degree upward angle if I'm not wrong.  I've been meaning to
> do some more tuft tests.  The problem is getting a fast enough chase/photo car, a decent non-panicky photographer, and miles of 
> empty road where you can use 2 lanes.  Not as easy as it sounds.
>   Another question.  If I wanted to do a simple pressure test using clear tubing and water columns, how would I take wind speed out
> of the equation.  Some open cell foam or filter to keep wind speed and direction issues out.  Sorry, I'm not drillin' holes and mounted 
> the tubes flush.  That might alter the flat black flow characteristics.
> Michael
> Gruppo Rompiculi Corsa...if you mounted one of those boat propeller trailer hitch covers on your Pantera's rear cross member...which way would it turn?
> _________________________________________________________________
>