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Get what you pay for??

Old 07-11-2007, 05:47 AM
Mike Freas
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Location: Kaeohe Bay Hawaii
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Default Get what you pay for??

I have a new Dynam 70A ESC that I replaced my Jeti 70 with.

Tonight I soldered the connectors on, checked I did it right and plugged her into my STM.

After running at half throttle for about 20 seconds (ESC hanging in the prop wash) it was hot to the touch. I decided to clamp my Amp meter on to check things but I know what the setup pulled already. With a cold half charged lipo I was pulling 41 amps at WOT. After a 30 second run blowing all kinds of stuff around the garage the ESC was HOT:
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Old 07-11-2007, 06:08 AM
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My wild guess would be the thinner one is the Dynam. The Jeti probably has some heatsinks which help it to run cooler, hence it is thicker.
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Old 07-18-2007, 10:33 PM
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Not a heatsink - better fets - lower "on" resistance - less heat
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Old 07-18-2007, 11:03 PM
Mike Freas
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I should have replied to this sooner. I flew this controller on my STM pulling 58 amps at WOT. I expected it to get hot and cut off and sure enough it did several times in flight even after crusing around at less then half throttle.

I think I'm just going to suck up the cost and stick with Jeti or CC. My Jeti controller doesn't even get warm when it's installed on the STM.
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