Jerry Hey wrote:

It is now time, I think, for us to design a radiator

that is the

right size, and has the inlets/outlets in the right

place, probably

AN,  to cool a NA 13B.   For turbos the core would be thicker,
otherwise the same. With the promise of repeat sales,

any radiator

manufacturer would be glad to add this to his

inventory.     The

water pump necks are part of the design.   We need relatively
straight, short hose runs, that's all.   With your CAD

ability, Paul,

I bet you could do this in five minutes.   Jerry

I could but talking a rad guy into offering a stock item would be
the hard part :-)

I don't think we are ready yet anyway. Nobody has built a

rad system

yet that is totally satisfactory IMHO. That means climbing out to
5000 feet on a 100 degree day at max climb rate. Or sustained top
speed at 8000 feet without over heating. I can do that in my 182.

The details, like back of the rad rad blockage and air inlet
ducting, are still on the ground so to speak.

Eventually I think we will go from the current norm of 500 to 800
cubic inch rads down to 300 to 500 cubic inch rads when

we get the

details nailed down. IMHO Perry Mick is pretty close to an ideal
water rad installation. His water rad air duct and scoop

need to be

a bit bigger IMHO. Of course he is also down around 150 HP max.

Paul Lamar

Thanks Paul, I'm just trying to apply what I'm learning on

your list!

It is definitely marginal though, at temperatures above

70-80F. It's

been cooler here lately and the water/oil temps are better.

My guess

is the limitation is the rad size, not the airflow through

it. Also,

my guess at HP is more like 120, I only burn about 7.5 gph, max. at
around 5200/5300 rpm.  These are numbers from my recent long trip.

Trip photos:  http://www.bridgingworlds.com/k75/k75_photos.htm
Kind of boring, just pictures of my plane at KBIL and K75.
--
Perry Mick
Duckt N7XR
http://www.ductedfan.com

Boring? I didn't think so. Thanks for sharing that, Perry

Chuck Dunlap

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