I thought few people ran SMC4900 pack at ICC.
Did ICC used different rules to ROAR?
Originally Posted by
InspGadgt
I believe ROAR's website has not been updated with the current batteries. I ran the SMC 4900 packs with the internal bullet connector at the IIC and they ran very well.
IIC typically allows different approvals than strictly following ROAR. They are able to do so re: potential safety matters because they do not rely on ROAR for their event insurance...Scotty insures elsewhere.
The way the ROAR rules read, "updated" or not, is that a product is not approved until it shows up on the list as-published. At this point the SMC battery is not on the list (at least not that I can find) and would not be allowable at a ROAR-sanctioned event. The IIC is NOT a ROAR-sanctioned event so "allowability" is at the discretion of the race organizers.
Originally Posted by
wingman2
I have also heard of people saying that the pack needs to be warmed up whilst charging, or others saying that you should keep them cool, so what's the deal there??
Originally Posted by
andrewdoherty
I would NOT recommend warming 1 cell LiPos. I thought I would try it when I was at Vegas. I left one of my SMC 4900's on the control unit of my Soldering iron to get it a little warm. I pulled it off and temped it at 128*F at it's hottest point and it had puffed a noticeable amount. It reduced a little after it cooled, and never separated the case, but its now raised a bit in the center . . .
Try it at your own risk . . .
Again, relating to ROAR and LiPo battery heating, ROAR issued a bulletin that specifically bans heating LiPo battery packs and that the measured temp of the pack at pre-tech should be abient (room) temperature + or - 5 degrees. Of course, in typical ROAR fashion, they have failed to identify whether that is 5 degrees Farenheit or 5 degrees Celcius. They also mandate that no more than 1C charging rates are to be allowed. The simple fact is that a LiPo battery charged at 1C will not heat above room temperature...certainly not 5 degrees (even Farenheit) above.
See the full text at
http://www.roarracing.com/downloads/..._addendums.pdf