Quote:
Originally Posted by Dagger Thrasher
Besides, electricity will always take the path of least resistance. The MMM has 0.0003 ohms per phase resistance, which is probably considerably lower than that of the aluminium heatsink (even with the anodizing worn away), so won't be an issue. What happened to your friend's battery?...
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That statement is not totally true. Assuming the battery is not completely shorted (causing all the battery voltage to drop across the battery's internal resistance), a partial short will cause some current to go through the heatsink and some to go through the load (ESC/motor). True,
more current will go through the path of least resistance, but not all.
Look at it like this: If the load presented a 0.25 ohm load, and the heatsink partial short is 0.01ohms, 96.15% of the current will go through the 0.01ohm heatsink "load", while the other 3.85% will go to the real load. Of course, in reality, the battery voltage will drop substantially even with a partial short...
I still don't think the HS/bullet proximity is "safe" IMO. But, even if the HS did partially short out the bullets, the contact area would not be ideal and the resulting arcing will eat away at the offending contact.