REFLECTOR: Oil cooler exit

[Pat Shea]

Barry,

Here are a few links to lower cowl "reverse NACA"
installations that Keith was describing:

http://www.tvbf.org/gallery/?dir=engines%2Fexhaust_jean_prudhomme

http://home.earthlink.net/~richardgwinn/Page33.htm

I suspect this would offset the added pressurization
to the low P side of the cowling from your 2nd oil
cooler and increase airflow over the cooler at the
same time. 

However, if you're happy with your CHT's, you could
just fabricate a cowl exit dedicated to your 2nd oil
cooler (the cowling in the 1st link has this).

If you go either of these routes, be sure to let us
know the before/after data!

Pat

--- gibbons <gibbons at as.net> wrote:

> I have two cooler, but I running 210-218 at 76
> degrees. I want it to be
> cooler so I'm exiting the exhaust out the bottom.
> Thinking that with it
> exiting inside the cowl it might be making the
> bottom of cowl a higher
> pressure reducing over all cooling.
> Barry
> 

> Barry,
> 
> I was just staring at that sub-project today.  The
> traditional solution
> is a "reverse NACA", in which the cut flap of cowl
> skin is bent in to
> form a "ramp" for the exiting air.  The ones I have
> seen didn't have
> anything sticking out beyond the original cowl
> surface.
> 
> Keith Hallsten



       
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