Tom
I was thinking about using the ducts for air to the radiator as well as air
to the carburetors. The radiator will have a fan on it. Maybe there is a
better way?
I have an air hole in the passenger side window too, but its just round hole
and the air seems sufficient at speed.
JB
----- Original Message -----
From: "Thomas E. Bryant" <saltracer@awwwsome.com>
To: "John Beckett" <saltracer@servusa.com>
Cc: <Flowbench@aol.com>; <piggy@accessatc.net>; <land-speed@autox.team.net>
Sent: Monday, February 16, 2004 6:06 PM
Subject: Re: NACA duct
> John,
>
> For what it is worth, I tried using NACA Ducts as air intakes a few
> years back and had performance problems. (as it turned out there were
> other problems) I talked to Tom Burkland about the ducts and as I
> remember, he said that they were not designed as intakes, but simple
> openings, that did not spoil the aerodynamics, allowing air to be pulled
> in by means of a fan. I have noticed the ducts being employed on
> aircraft engine cowlings, both forward and reverse, but I don't know if
> they are using some kind of blower in connection with them. Maybe they
> are just vent openings.
>
> I know that the location of the duct is critical. I had a duct in the
> passenger side window of our car for a time. It worked well up to about
> 50 mph and then gave no air to the inside of the car. I am now using the
> ducts as air intake for the cooling system and using a radiator fan to
> move the air. It seems to work OK.
>
> If you are planning to use them as air intakes for the motor, my
> thinking is that you can get clean air, but probably no increase in
> volume (no boost).
>
> Good Luck!
>
> Tom, Redding CA - #216 D/CC
>
> John Beckett wrote:
> > Mike
> >
> > My history may be way off base here, but I thought that NACA was the
early
> > version of NASA. That the testing on these ducts was late 1940's. And
yes
> > aviation was trying to crack the sound barrier at that time. Have
noticed on
> > 747's and the like, which are sub-sonic, that they do use the NACA duct
on
> > the fuselage. But as you mention all this doesn't mean that they will
work
> > correctly.
> >
> > JB
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