David Renaker wrote:

Attended a SportAir Class this weekend on Velocitys.  In the next room was
a group learning skills to build RVs.  In reading the postings on radiators
an idea keeps coming up in my head.  If you have looked in your computers
lately you will notice that they are gluing ever larger heat sinks to the
CPU.  Has anyone ever considered using that large aluminum wing hanging in
the breeze to dissipate heat instead of a radiator?

This could take
1. Some aluminium plumbing for weight and galvanic activity.
2. Continuous loop through wing to prevent leaks at connections with in the
wing.
3. Providing heat path with thermal glue or  weld to transfer heat from
aluminum tubing to skin, ribs, etc.
4. Reduce weight and drag by eliminating radiators.  Weight offset may be
consumed by need of larger coolant volume.
5. Defrost wings.
6. Might damage paint.  Paint may insulate.

Now that Tracy's in recovery mode maybe he has some engineering thought
processes to spare.

This subject comes up from time to time on here and through out the history
of aviation it has been tried over and over without lasting success.
I am not sure why not. Perhaps it is too hard to fix if you get a leak
and too hard to accommodate 30 psi in a flat structure from a structural
point of view. Early P38's used the wing for intercoolers and Schnieder cup
racers used tubing along the fuselage and floats.

Paul Lamar

Don Dunbar wrote:

Don Dunbar wrote
I have designed many cooling systems for the marine industry and have the
required areas required, the same problems would be faced as in a vessel against
a wharf and a plane on the ground and that is to get enough air or water flow
over the plates.
For 200hp in water of 30deg C requires 19 square feet of area, the cooling
efficiency does not increase greatly after 15 knots.
Hope this is of some interest.
At the Velocity class did you happen to meet a friend of mine Steve Bilby who has
been at the factory leaning to fly a Velocity before he test fly's his own in
Australia.
Regards Don

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