RCU Forums - View Single Post - Marez on Parallel Operation - One more time.
Old 07-22-2006, 05:20 PM
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Red Scholefield
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Default RE: Marez on Parallel Operation - One more time.

ORIGINAL: Flying Geezer

I have not seen a post where anyone has attempted to duplicate Eloy's test.

If any of you would like to trash me for respecting Eloy's right to his opinion, let 'er rip.

Geezer, not to trash but to educate.

Here is a test even more simple than Eloy's.

Connect two packs via a wattmeter, one pack discharged completely (open circuit voltage 4.56 volts) and one fresh off charge at at 5.42 volts.

Initial current from the source battery to the load battery 520 mA, after 15 minutes (typical flight time) this was down to 60mA with 75 mAh being transferd.

Now connect a 3 cell pack (simulating a pack with a shorted cell). Initial current 1.68 amps - after 15 minutes current had dropped to 800 mA with 227 mAh transfered. Consider now that if the short had just occured (you are not in the habit of doing an ESV check prior to flight?) then the 1.68 amps would probably have cleared the short and you would be back to senario above.

Any questions?