rad and coolant,

[Ken Mayer]

> How would it work to put louvers on the radiator and open and close 
> them?  You could operate a small cylinder or bellows with a tiny 
> valve and oil pressure.  If the louvers were closed you would not 
> have the inefficiency of pumping losses (air) through the radiator 
> when maximum cooling is not needed

Over the road trucks use this type of system.  The louvers are
pneumatically activated.

Ken
:-)