Recent content by markcycle

Thanks Chris We did it with a water cooling system Jon designed, it worked great it was a spray system triggered by heat and the blowers keep the water evaporated. With heat under control we can up the current, as the motors are still not near core saturation. After the race without charging we...

Some Pictures

Jason accidentally pulled the cord tied to the emergency switch shutting off the motors tomorrow will be better and faster he did not run out of battery

Looked Like a good race SQ6SWnHFVEY

Not So

Used a BM6 to monitor the indivdual cells and as a low voltage alarm so if i got any cell going under 3.5 volts i terminate the test.

Here are plots of some of the packs The variation I attribute to temperature. some were done at 55 to 60F and others at 65 to 70F

To me they are the best deal going, not that this is the only good Lipo Solution to building a larger battery pack, there are many

I'm trying I know he is willing but it just comes down to money

I charged them to 4.2 for the test, but in everyday use it'll be 4.1 to 3.6 volts. I'm totally happy with 4.7 AH capacity for a first power cycle. I expect they may even get a small amount better once cycled a few times. I can't wait to get the ThunderJunk (Thundersky) cell out of my bike.

permanent parallel its going to be So far the packs are showing at 1C 4.7 AH with a cutoff at 14 volts I'll show the plots later I've charged about ten of them and they all are 2/3 charged and balanced out of the box - very balanced so far so good

Wiring not the issue for me, it'll go fast, its the pretesting I have to do before the wiring begins that's a time killer i do have it so the test can be done unattended but of course I'm in the room/shop while they are being tested and charged. Having a CBAII helps

That's a lot of voltage I've only purchased the cheap 20C packs

I've been buying turnigy for almost 2 years now and have not had your kind of failure rate. Of the 50 packs or so I've purchased (none hardcase) I had two packs fail one with a zero volt cell and one puffed and had low capacity. The one that puffed I may have damaged with a heat gun. But...

Got 50 hardcase 4S 5000ma 20C packs today all the cells checked out at 3.79 to 3.85 no dead cells This will all become a 8P 24S pack 100 volts @ 40AH maybe more if I also use other packs i have around