This maybe relevant for those that want to know more about cooling systems.
A part of the full section follows.
Although it’s important to keep the engine from overheating, it is
equally important to prevent over-cooling.
Over-cooling encourages the formation of acids and sludge in the oil. It
also tends to reduce combustion-chamber
temperatures by quenching the flame front. This results in higher
emissions and greatly reduced fuel efficiency,
because much of the fuel remains unburned.
You find the full section here.
http://www.bobcerullo.com/Articles/CoolingSystems.htm
Regards David Gaze
That is an excellent description of the conventional automotive cooling system.
Thanks for finding that Dave.
I had another idea for an aerobatic aircraft system. Since most of the time
an aerobatic airplane is climbing at full power with some nose up angle I
suspect that the reason they put the P-can on the nose of the engine in
the P51 and P38. This was to keep the air pocket as high as possible.
Here is a design that uses two Zero part # ZR64 A four inch diameter cans
4.5 inches long. A Mazda RX8 style air separator baffle is inserted before
the cans are welded back to back. The baffle does not need to be welded in
as it is not going anywhere after the cans are welded together.
Well maybe a tack here and there.
Solenoid operated shut off valves in the hoses coming out of the P-can
can be used to discourage the coolant from flowing back into the P-can
from the rad displacing the air when the airplane is inverted. These
valves can be turned on after a short delay by mercury switches that
respond to gravity vectors.
BTW an airplane flying inverted or knife edge in an air show usually only stays inverted
for the length of the runway. At 180 miles per hour that is only
about 20 seconds.
This is design particularly good for an airplane with a low height firewall
like the KIS and Lancair. Also airplanes with cowls that provide limited
room between the firewall and the back of the engine. RV6 is one example.
For another inch or two of cowl clearance the P-cap can be recessed into
a well in the top half of the can. Not shown in this 3D yet.
Paul Lamar ...No rotor no motor.
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