I posted here my experience of rather heavy and slow RC tank that was mostly enclosed by hot steel hull in the mid-summer,
which conditions were terrible for a 2-stroke glow engine to run the tank.
For this background,I chosen an engine for RC helicopter with a bigger heatsink for the first time
in vain. Therefor,at this point I gave it up to stick to air cooling with no air flow fundamentally inside the tank mostly enclosed.
I was obliged to go to water cooling at this time as final method to run the tank in the mid-summer and it went very well
consequently. The system was rather troublesome as it needed some auxiliary components to cool the engine ,BUT I found it so effective to cool.!
I intended to put much emphasis on water cooling itself as so effective way to cool,referring to my experience of the RC tank.
Needless to say,it must be the best if salty water could be available for cooling the motor with less maintenance.!
1/2;Water cooling with outside water is the best, if it's available,to say nothing of.!
3;If not,water cooling with a fresh water tank in the model is only way for me currently.
The pic shows water cooling system adopted in the 1/10 steel electric RC tank weighing over 25kg.
As you may know,a 12V7Ah and a motor are too heavy with no airflow actually,what is worse,it's slow moving tank...
I posted on stunning effectiveness of water cooling regardless of kinds of the RC models from my past experience.