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Old to new pack comparison

Old 05-29-2006, 11:38 PM
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Default Old to new pack comparison


Here are some data logger images of a 10 minute flight of P-07. One is using a set of 5300's that has 74 cycles on it, the other is flown with a brand new 5300 (first cycle).

The setup is a Plett 30-10, ZN Line Twister at about 10.6 lbs. Schulze 32.80 KA controller, APC 21x13W e prop that I have re-pitched to about a 21x15W prop. Amp draw is not included because it clutters the plots up too much, peak draw in flight for both packs was 62.5A...rpm is about 5600. The temperature probe is mounted between the packs which are attached to each other with a 1/2" gap between (ambient was 15C or so)

I was always curious as to how well my old packs were doing when compared to a brand new one.... The plots show that the voltages during flight are nearly identical, but the old packs do have a bit more punch in the air. Granted the new packs will break in a bit, however at the end of the day I suspect that the new ones at 10 cycles will be very comparable to the ones at 70+ cycles.

I dont baby my batteries...those packs sat over the winter in various states of charge...were flown in very cold weather and not allowed to warm up...they have seen a number of 90%+ discharges and have been over 60 degrees celcius more than once (still learning how to cool!) Always balanced using TP balancers, and most of their life has been spent as a series pack...being charged as 10s. Probably 80% of the cycles were done using a Schulze isl 330d charger and a pair of 205 balancers (still charged in series)...and the rest on a TP 1010C charger and a 210 balancer. They have always remained balanced. I did a 1C capacity check on my packs a couple of months ago and it showed about a 2.5-3.5% drop in 1C discharge capacity vs. a new pack.

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Old 05-30-2006, 10:30 AM
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Default RE: Old to new pack comparison

I hope TP keeps these packs in production for awhile. Here's a 6000 pack with 118 cycles. Holding 33v @ 76 amps throughout a 9 minute flight. Seems to just keep getting better with age, even after 6 months in storage. Second pic shows about a 10 second burst 8 minutes into the flight.
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