> Chris, Larry -
> Hey, I'm one too! A Velocity builder that is. Working on a 20B powered
> SE-RG like Al's. Good luck Chris on the ECU upgrade...I know we're all
> anxious to hear how its working for you once you get it back.
> And Larry, its good to hear of someone with tools and talent. I wish I
> had a CNC too :-) Thats what I did most getting my undergrad. Loved
> it.
> We all cant wait to see you succeedd in your plane and business
> endeavors with rotary parts. Best of luck.
> I'm sure we'll all be talking before long. Best regards,
> John Bell
> Knoxville, TN
>
> Al, you need to chime in here as well. Al Gietzen  is flying a very
> very
> nice example.
>
>
> Paul Lamar
>
>
> Just food for thought... anyone thought of doing a P-51 style
> divergent duct
> on the belly of a Velocity for coolant and oil? They can be build
> to be very
> efficient....
> Larry
>
> Bulent's cooling system is highly successfully and he is using one
> on his fine Cozy. In fact I use it in my book as the right way to
> do a pusher cooling system :)
>
> Paul Lamar ...No rotor no motor.
>
> Well, I have been listening to Paul for years now and didn't even
> try to use
> the NACA's for primary cooling.  Instead, in addition to the top
> NACA's I
> installed the "old school" armpits scoops that Velocity used to
> use.  We are
> gonna be channeling air from both scoops to a center area behind the
> firewall, but in front of the heat exchangers.  The heat exchanger
> for us is
> mounted very much like it would be in a car, except at an angle
> with the
> unit being close to the firewall at the top and angling away from the
> firewall at the bottom where the scoops are.  We plan to use the
> NACA's for
> supplemental cooling items and intake.
>
> Donno if it will work, but we are hopeful.
>
> Christopher Barber
>
> Send me some pictures Chris.
>
> Paul Lamar

I believe that NACA experiments have shown that filling a single
plenum from more than one source does not work well.  The problem is
flow reversal through the lower pressure inlet.   Jerry

Funny you should mention this.  Even though we are not using the NACA's for
cooling of the water or oil, we still have the NACA's installed (per plans
and completed a few years ago).  As to the armpit scoops, we have one on the
lower cowl on each side of the plane just under the strakes.  I have not yet
created the conduits from the scoops to the radiators, but that very issue
has been discussed and we intend to make two chambers, one for each scoop to
the radiators with a partion in the middle.  Should be pretty straight
forward with fiberglass.  Must admit, the air flowing out was not our
original concern, it was more the air from the two side coliding with each
other and losing effecientcy before it flows through the radiators (one
large water cooler and one oil cooler are located in the same area).

Here are some pix of the scoops, I will try to get some of the radiator
placement.

All the best,

Chris

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