red_z06
Elite Veteran
Location: Dumont, NJ
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| any reason why the black head version would be better? i got the blue head version..
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Heat transfer of a heat sink is a balancing act. The effectiveness goes in the order of conduction, convection and radiation.
Conduction relies on the core temperature on one side and dropping down to ambiant temp on the other side. Shorter the distance, the better the efficiency as the material acts as a resistance in an electrical circuit.
Convection relies on heat transfer by a fluid (air in this case). The more the surface (fins), more effective the heat transfer.
Blue head has a lot more surface area than the black head so the convection transfer is better. But, due to longer fins, conduction suffers. Since conduction is more effective than the convection, in this case, it wasn't optimized properly or as effective as the black head.
Recap:
Conduction - less distance is better
Convection - more surface is better
Both means of heat transfer counter the effectiveness of the other method.
Again, it is a balancing act.
Most things in the RC industry has been developed by trial and error method as opposed to relying on the mechanical engineering simply due to the lack of resources and or funds. Finite element analysis on the heat transfer model would have shown the best solution but my guess is that they opted for tried and true method.
www.justinchi.com |
i mean are we talkin 5-10 degress difference or more like 15-20 degrees
