Tow,
Why would air be trapped in the top, no different to other radiators with either a fill point or breather tube at the top. just inlet and outlet from engine on the bottom.
Good thought Merv,
oil coolers are all on same plane.
I dont see why a current of water would be restricted to running just along the bottom, the volume of water is too great to just travel accross a few tiny capileries.
It would be the same with a convential radiator, doesnt just pour in on the left side, down to the bottom on the left side along the bottom tank and out the right.
I know that radiators run under pressure, not vacuum, and pressure would be a constant, so there fore flow would be equal through all the radiator tubes....i think.
still open to ideas.