I am working on my Sun n Fun forum talk next week.
I will start with Dave Leonard's interview video and
our RX8 races a turbo RV6 video and then slip into
cooling system design with good and bad examples. The
videos are on the web site below under what's new.

What is wrong with these cooling system designs?

Picture of round intake by permission of Bernie Kerr.
Consider this a quiz for all you people that have been
on here for years :)

Paul Lamar

Pick me, pick me!

#1 has too little duct lenght and no expansion profile to slow the
incoming air so that it can pass through the core.  End result is, at
higher airspeeds, air will dam up and simply go over the cowl rather
than through.

#2 appears to be the same thing, only in actual reality.

#3 Radiator behind hot object (motor).  Since delta t is everything in a
cooling system, pre-heating the air is bad.  Proximity to the
firewall.... no smooth friendly ducting to 'encourage' proper airflow
through core.

Chris C

You get a B Chris :) On a scale of D- to A+

Paul Lamar

Sealing behind the spinner?
Is that a thermostat in the Powersport install?
Is that a water/oil heat exchager I see as well?
One belt instead of two?
Hidden from our view is the poorly beaded aluminum tubing
that will pop off at any moment?

Just guessing now....

Chris Cosman

Getting very warm.

Paul Lamar

-Clifton wrote:

How about making the air intakes rectangler and ram air instead of round.
maintain geometry do not taper duct before or after exchanger.-

No :)

Paul Lamar

Clifton wrote:

Well then I will try this one again on the theory that you may not have recived it. the First time I sent it out . sealed ducting this will work equal will with air cooled heat exchangers as it will with  Water cooled ones there are significant gains to be had when you avoid over  pressurizing the cowl area? :-)

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