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1. 05:22 PM - Re: Engine cooling Louver Vents (FLYaDIVE)
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| Subject: | Re: Engine cooling Louver Vents |
Jeff:
The hard and fast rule for forced air cooling is the EXHAUST area must be
at least TWICE the size INTAKE area.
Another simple little trick in cooling is to create a negative pressure
area directly at the ramp exhaust port(s). This can be done with a simple
piece of aluminum strip 1 1/2 to 2" wide and long enough to span the ramp
area and bent lengthwise down the center-line at a 45 deg angle sort of
like this
---> ___/ [But flip it so it angles DOWN] Then rivet it to the edge of
the air exhaust ramp. Works great and you will NEVER notice any drag...
Just lower temps.
Barry
On Fri, Jul 20, 2012 at 2:36 PM, Jeffrey J Paris <jeffrey-j-paris@excite.com
> wrote:
> Gentlepeople,
>
> A few months ago someone out on our lists mentioned that they were using
> some louvered vents in an aid to cooling their Jabiru installation. I
> would be interested to see if anyone has some anecdotal or actual
> experience with utilizing louvered vents on the bottom of a cowl in an
> effort to aid and imnprove engine cooling.
>
> In my case I have a Jab3300 powered Zentith Zodiac in which I'm pretty
> much dialed into in terms of cooling. However, I am also a builder of a
> Jab 3300 powered Europa Classic Monowheel and due to the fact that the
> footwells and the main landing gear truncate the bottom opening of the cowl
> making a clean and big enough exit a bit "messy".
>
> I am curious to see if a set of vented louvers running parallel and under
> each cylinder would create enough pull to enhance cooling? (Bonanzas have
> em') Do the experts think I might have some luck with just such an
> installation?
>
> Thanks for your time and consderation.
>
> Jeff Paris
>
> *
>
> *
>
>
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