I had a long talk with the originators of the Cool Jugs
at the Camarillo air show this morning.
Here is a picture of his Piper Cherokee with the water cooled
O-360 cylinders installed. It is still in development as 
most people find that water cooling is not as easy as it
looks. The rad in this picture is missing as a new rad is
being made. The small can on the firewall is the coolant overflow
tank.

The engineer involved is at least aware of the need for air pressure
measurements and he claims he is seeing 10 inches of water on the
face of the rad and a slight negative pressure in the cowl
when he was using cowl flaps. Unfortunately I forgot to ask
him at what speed. He promised to send me email so I can ask
him then.

Paul Lamar
 
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