Initially, the Hobby was created as the main radiator in amateur classes, equipped with engines that had less need to dissipate heat. However, in shifter classes, it assumed the role of an additional radiator that enhanced the cooling system coupled to the main radiator. Exactly as is the case for our other Supplementare model.
Lastly, thanks to its extremely low weight, it is now widely used as the main radiator in the OK and OKJ classes.
The manner in which it is mounted depends on whether it acts as the main radiator or as an additional radiator. In the first case, it is assembled in the traditional position to the left of the seat/driver. In the second case, it is mounted outside the engine, to its right, because the assumption is that the left side is already occupied by a large main radiator.
When to use:
Spring (as the main radiator)
Summer (as an additional radiator)
Winter (as the main radiator)