Over-Volting LiPos and SAW Racing

[detox]

Can i set my lipo charger to 5s (balancer disconnected) to over-volt my fully balanced and charged 4s pack? I will have to watch volt read out carefully.

[Doug Smock]

Can i set my lipo charger to 5s (balancer disconnected) to over-volt my fully balanced and charged 4s pack? I will have to watch volt read out carefully.

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[drwayne]

Thanks Don
That reads the same as down under, except for 2 a) where we allow multiple esc with individual packs .providing total individual cell count does not exceed that class limit.
eg 2x [ 3S to esc] = 6S class

regards
Wayne
AMPBA192
Au

[detox]

I allways wondered why Brian was so fast. I am sure his props have a little to do with it.

[raptor347]

I allways wondered why Brian was so fast. I am sure his props have a little to do with it.

Ah, but the interesting thing is you don't get consistent passes with an overcharged pack. The back up run always sags significantly. You'd never see say a 103.6 mph pass backed up with a 103.1 mph pass (my N2 hydro record run). I'm afraid the speed has nothing to do with overcharging, could be the spinning thing on the back.

The later generation Hyperion chargers can be programed to overcharge the cells, but not by much and does the box ever scream at you when you try it. Lots of warnings on the screen. It seems to degrade the cells in a hurry as well. I've tinkered with it, but found the penalties outweighed the benefits, at least in the classes I run.

Now low current classes like N1 may benefit from overcharging. The high power stuff, not so much.

Just my .02

[NativePaul]

Here at the UK nationals racing under the Naviga rules that apply to most countries worldwide, we have a nominal 4.2v limit with an absolute limit of 4.23v, which prevents significant overcharging but still allows a little leeway as we don't want to be disqualifying honest people that happen to use cheap un-calibrated chargers that could be a couple of mV out either way.
There is random testing on the launch platform via the safety loop sockets which takes very little time at all, I raced in 11 heats last year and got checked 4 times, one of those times they checked everyone in the heat heat and it still only took about a minute. although if anyone would have had a spurious result they would have had to de-tape and get checked across the battery/speed controller connectors, if it failed there (which I don't believe has happened) we could start the race with little delay, but if they pass it does delay things a few minutes as they have to re-tape.