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A couple of years ago the issue of Vescos car came up and a protest was
started by Jim Fueling stating the Vesco car was assisted by thrust from the
exhaust. I and several others were in attendance at this meeting. Vesco
proved that the exhaust flow / pressure was not enough to move the vehicle
at full thrust alone. With any drive to the wheels the vehicle will not
move. I don't remember the exact numbers but they were very low. Some where
in my file I believe I have the engineering reports submitted by Don Vesco.
It's like Fueling's Chevy powered streamliner (4 wheels )with one removed
being called a motorcycle. My feelings on that issue is a motorcycle has two
wheels unless it is a real side hack racer which there is a class for.
Lets see what this starts.
Glen
----- Original Message -----
From: "Joe Amo" <jkamo@rapidnet.com>
To: "Dave Dahlgren" <ddahlgren@snet.net>
Cc: "Smith, Simon-Pierre" <Simon-Pierre.Smith@PSS.Boeing.com>; "land speed"
<land-speed@autox.team.net>
Sent: Tuesday, July 03, 2001 7:51 PM
Subject: Re: Ballast
> I am with your line of thinking Dave, BUT
> with the aero/go fast expertise that the
> Vesco's have, it would also seem logical
> that they have good reason for their design...
> Joe :)
>
> Dave Dahlgren wrote:
>
> > Thinking logically it would seem the down force to be canceled by the
increase
> > in aero drag. It has to make a lot bigger hole in the air if it comes
out 90
> > degrees to the direction of travel. If you aim it out the back it will
do no
> > harm and might fill in the hole to a certain degree that you are making
in the
> > air. 'Base drag' and all that stuff.
> >
> > Joe Amo wrote:
> > >
> > > yes, but when it is applied through the wheels
> > > you get to take advantange of all that multiplied
> > > torque from the motor, and that likely pushes
> > > alot harder than any thrust derived from pushing the exhaust
> > > against the air, perhaps that is why Vesco uses it for
> > > downforce......
> > > Joe :)
> > >
> > > "Smith, Simon-Pierre" wrote:
> > >
> > > > Seems to me that for every pound of downforce you get from your
exhaust, you get that much times your coefficient of friction out of your
tires. On salt you'd be better off pointing the exhaust back so you get
pure thrust. Remember that the thrust doesn't go through the wheels so it
is not traction dependent. At Maxton I'd figure you can get a friction
coeff above 1 so it might be worthwhile pointing it up.
> > > > One other point, if the exhaust is pointed up and is aft of the rear
axle it will lighten the front wheels. This will give it a greater
effective downforce on a rear wheel drive car. Hard to make up for a
coefficient of friction of about .5 though.
> > > >
> > > > Simon-Pierre Smith
> > > >
> > > > > ----------
> > > > > From: Joe Amo[SMTP:jkamo@rapidnet.com]
> > > > > Reply To: Joe Amo
> > > > > Sent: Sunday, July 01, 2001 11:08 PM
> > > > > To: Dan Warner; land speed
> > > > > Subject: Re: Ballast
> > > > >
> > > > > Here you go Dave, an exhaust
> > > > > collector that is directed up for
> > > > > the acceleration heavy portion of the
> > > > > run, that rotates to or towards a more
> > > > > rearward aspect to enhance drag toward
> > > > > the end of the run.....
> > > > > Joe
> > > > >
> > > > > Joe Amo wrote:
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