Quote:
Originally Posted by johnrobholmes
An outrunner may spool up slower as compared to an inrunner (more moment of inertia), but this would be no-load. An outrunner has 7 times the commutation cycles per revolution as compared to a 2 pole inrunner, so the ESC can synch it just as fast as an inrunner hooked to a pinion/ spur geardown.
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I thought synching had more to do with the magnitude of the back emf reaching a level that is measurable by the ESC. That would make it depend on speed and independent of the number of poles.
Quote:
Originally Posted by johnrobholmes
Has there been any consistency with how the cells die? In a certain spot in the pack maybe? Have you tried slow charging or discharging of the packs to break them in? I have been running a123 a long time and only had once cell out of 50 die.
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I have slow charged/discharged them all twice before running them.
I have not noticed that they die in a particular location in the pack. The last time this happened, the voltages were 3.3, 3.3, 3.3, 3.3, 3.3, 2.6. Everything I can think of that would cause LVC (bad solder joints, too much current, etc.) should not affect the balance.
What about overheating the cells when soldering the tabs? I use a gigantic iron... I think it's 80W, and heat the cell tabs less than 5 secs to tin and then about 5 secs again to solder the wires.
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