@Mike and Doug
Your both right, the ear radiator "eats" the speed in the air like Dumbo's ears
Mike, you can't see the second radiator waterpipe on the model -- under the Gun's.
But by an open cowling you can see the header-tank, the upper-pipe from left to right radiator and the Y-tube.
...............it's a good tip from you, Mike, -- I will ask Koloman.............
Servus
Bertl