RC Model Reviews

From my limited science knowledge

Black is a good absorber of light wavelengths, absorb enough and you will generate heat eg black poly pipe roof mounted to heat a swimming pool. As to disipation from a "heat generator" I would doubt that, the mechanism of absorption would need to be reversed.
The best way to disipate heat is to increase the surface area and use a reflective colour (normally silver), HobbyKing now sell heat sinks. Good ventilation and a finned heat sink would be a more efficient method.
But hey, if it works

Physics 101 black body radiation, a black body does radiate heat better than silver for instance.
Conversely it also absorbs heat better too.
So it radiates better but only cools when not being bombarded with light or infra red radiation it can absorb.
So in the shade it will have a better heat dissipation.
But forcing air through finned heat sinks will work a lot better in our situation.

Maybe one of those tiny CPU fans would work. The inside of a Bixler resembles one of those small foam beer coolers !!!