Not what he said Dave. Only that at 100 mph the pressure recovery from speed
is a few percent above static pressure and at 200 mph is is a bit more. For
instance, at Speedweek the static pressure is arounf 26 inches of mercury or
about 12.77 psia. Now at 100 mph the dynamic pressure is 0.148 psi due to
forward motion. At 200 mph it is 0.594 psig.
So, the total pressure at 100 mph is 12.77 + 0.148 = 12.922 psig or about a
1.19 % increase above ambient
Then the total pressure at 200 mph is 12.77 + 0.594 = 13.36 psig or about a
4.65 % increase above ambient..
I think that is all that was said.
Now what you up to? I am up to no good as you can see...
mayf
----- Original Message -----
From: "Dave Dahlgren" <ddahlgren@snet.net>
To: "Benn" <karhu@california.com>; <land-speed@autox.team.net>
Sent: Sunday, April 10, 2005 12:44 PM
Subject: RE: Engine Air Inlets - definite improvement
> what if the inlet is the size of a soda straw does it still work?
> dave
>
> > -----Original Message-----
> > From: owner-land-speed@autox.team.net
> > [mailto:owner-land-speed@autox.team.net]On Behalf Of Benn
> > Sent: Sunday, April 10, 2005 1:43 PM
> > To: land-speed@autox.team.net
> > Subject: Re: Engine Air Inlets - definite improvement
> >
> >
> > Without breaking out the ol' fluids books, I recall the effective static
> > air pressure increase due to ram effect at speed to be a few percent at
> > 100 mph and somewhere around 5-10% at 200 mph.
> > Benn
> >
> > ----- Original Message -----
> > From: "J I Waldron" <jwaldron47@earthlink.net>
> > To: "Dave Dahlgren" <ddahlgren@snet.net>; <land-speed@autox.team.net>
> > Sent: Saturday, April 09, 2005 6:05 PM
> > Subject: Re: Engine Air Inlets - definite improvement
> >
> >
> > > Yikes. No way for 28 lbs of boost. Must be conversion
> > > process for ram air to psi. I'll go back to stuff I know.
> > >
> > > Thanks,
> > > Jim W.
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