Hi,
A great example of this type of cooling is the Britten V1000 motorcycle:
The air enters in the small ducts in the nose of the fairing, and the (small) radiator is located under the seat, and the hot air exits out the duct "stinger" at the tail of the motorcycle.
This motorcycle is
totally amazing btw: custom engine (producing 165 horsepower at 12,400 rpm -- with no need for counterbalencers) is a stressed member (it IS the frame, really!), the front and rear suspension are carbon fiber girders with the suspension travel provided by linkage, the wheels were handmade with a "skin & bones" carbon fiber structure, and the aerodynamics (dubbed "torpedo over a knife edge") was unusual and ground breaking.
