REFLECTOR:INTAKE COMBUSTION AIR

[Dennis Huntington]

Tom

I did what you are suggesting with puting the intake for the induction on a 
separate scoop on the bottom.  I also put a scoop on the roof to increase 
the air for the cooling.  Had I to do it over, I would not add anything to 
the bottom.  I had originally put the lower scoop to try to lessen the amout 
of air taken away from cooling air.  It made not difference in performance 
or in cooling.  Then we added the scoop on the roof and that more than did 
the trick for cooling the engine.  I had a supercharger installed when I was 
doing those things and have since removed the supercharger,  But the cooling 
is sure good.

I also started out with one cooler.  I later added a 2nd but did not vent it 
outside.  I ended up venting it outside as well.

If I were you, I would stick with the plans, and pay special attention to 
the overhead NACA.  Make sure it is right. Then make any changes if you need 
to.

Good Luck

Dennis Huntington
XLRG




>From: "Tom Martino" <tmartino@troubleshooter.com>
>Reply-To: reflector@tvbf.org
>To: <reflector@www.tvbf.org>
>Subject: REFLECTOR:INTAKE COMBUSTION AIR
>Date: Sat, 13 Sep 2003 19:02:13 -0600
>
>On most of the Vs I've seen ... all of the air to the engine comes in
>from above through the naca vents.  The air is then directed over the
>cooling fins of the cylinders.  There are also 2 ducts that divert some
>of that air.  One duct goes to oil cooler and the other duct provides
>combustible air for the engine.
>
>I have been wonderings if the engine would run more efficiently if I put
>a separate air intake scoop (low profile) on the lower cowl.  This looks
>as if it would provide a more direct and cooler flow of air.  And it
>wouldn't divert any of the cooling air away from the cylinders.
>
>And while on the topic of cooling ... is it really necessary to have two
>oil coolers?  Is the one up front good enough?
>
>I saw one Velocity that had only one (up front) then had tiny side vents
>along the fuselage which directed air into the ducting that carries the
>oil lines.
>
>So is there anyone using just one oil cooler up front and not the one
>ion the engine compartment?   I would appreciate any insight into either
>of these topics.
>
>
>

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