SMC 28C 4000/5000 Hardcase Lipo part 2
08-11-2008, 08:51 PM
#1006
Check, and check. Motors are geared at or near recommended gearing with a temp of 160 degrees F, after the run. Speedo temp is about 130 degrees F after the run. But the temp on the speedo was with a high airflow fan. I tried a different battery today to test (tekin 3400) which I borrowed from a friend. The battery is only 2 weeks old and the smc 4000 I got when they came out still has more go go juice. But both batteries did the falling off thing. Again, it is not a huge drop, it is like losing the peak on a nimh cell.
08-12-2008, 07:29 AM
#1009
Check, and check. Motors are geared at or near recommended gearing with a temp of 160 degrees F, after the run. Speedo temp is about 130 degrees F after the run. But the temp on the speedo was with a high airflow fan. I tried a different battery today to test (tekin 3400) which I borrowed from a friend. The battery is only 2 weeks old and the smc 4000 I got when they came out still has more go go juice. But both batteries did the falling off thing. Again, it is not a huge drop, it is like losing the peak on a nimh cell.
08-12-2008, 08:21 AM
#1010
08-12-2008, 09:00 AM
#1013
If you are drawing amps off of any battery the voltage is going to drop. During a discharge cycle my packs will stay at 8.0-8.1 volts for at least 30 seconds but the majority of an average 412 second discharge is spent in the mid 7 volt range ie:7.7-7.2. As a matter of fact it's on the case that came with your smc lipo, typically a 4000 will have an average of 7.3v at a 35 amp discharge. Every battery you run is going to have that initial "top" on it you cannot avoid that fact, but yes it will quickly go away.
08-12-2008, 09:26 AM
#1015
Yes voltage will drop as with any other type of battery but I don't think it should be as noticeable as the sub-c cells as the IR of Lipos stays very consistent throughout the discharge. In fact if the pack starts cool the IR should get better as it heats up so the power should stay very consitent.
Maybe what were seeing here is just a simple case of what is noticeable for one racer isn't as noticeable to an other or it could be speed control related.
Maybe what were seeing here is just a simple case of what is noticeable for one racer isn't as noticeable to an other or it could be speed control related.
