SMC 4000/25C/3.7V single cell Hardcase pack.
#136
Tech Addict
iTrader: (2)
The Spektrum Pro receivers (I think!) can handle an unregulated LiPo rx pack however you must be careful with how much power you're sending to the servo. Many of the 8th scale servo's are ok with the extra voltage because they're pretty heavy duty to begin with. I believe Ko and a few other have come out with unregulated LiPo approved servos that are meant to hand;e the extra voltage. I'm not sure how the small servo's we use will respond to the extra though...
#137
I have the futaba 9550 mini-servo (I think that's the number) works fine w/losi lipo pack for hte micro-cars. been using it for a year.
#139
I wired this setup into my car and left the esc turned off and it works. I will find out tomorrow if it lasts 8 minutes.
#140
Below is a video of our 1/12 A-main on Saturday, and the magenta car (Danny) is running the SMC 3.7V Lipo with a 13.5 for the full 8 minutes against a full main of 4cell 17.5 cars.
He ran a LRP 13.5, LRP TC-Spec ESC, 300mah Lipo receiver pack, and no regulator. We tried removing the red wire from the ESC like KHoff mentioned, but then nothing worked at all. The car did NOT work well with a 5cell NiMH pack, it started to get the "dumping" feeling after less than 5 minutes.
With the Lipo Rx pack, the car lasted the full 8 minutes and did not drop off much. You can see on the last lap that he is right behind the leader (the green car), and they are running the same speed. In fact, the lap times of the NiMH cars dropped off more than his Lipo car.
About 250mah was drained from the 300mah Lipo Rx pack during a run.
He ran a LRP 13.5, LRP TC-Spec ESC, 300mah Lipo receiver pack, and no regulator. We tried removing the red wire from the ESC like KHoff mentioned, but then nothing worked at all. The car did NOT work well with a 5cell NiMH pack, it started to get the "dumping" feeling after less than 5 minutes.
With the Lipo Rx pack, the car lasted the full 8 minutes and did not drop off much. You can see on the last lap that he is right behind the leader (the green car), and they are running the same speed. In fact, the lap times of the NiMH cars dropped off more than his Lipo car.
About 250mah was drained from the 300mah Lipo Rx pack during a run.
+ YouTube Video | |
#141
Ran it today. 13.5 single cell is exactly the same until the cutoff kicks in. I played with gearing to get it to last the whole run. I got to end up being a little bit off pace through the run but not hitting the cutoff until the last 20 seconds. I think once the booster curciut is available it will be perfect.
Thanks
Chris
#142
#143
Nexus,
With your setup did you leave the esc switched off or on?
With your setup did you leave the esc switched off or on?
#145
Its not a mess its called testing. Next we tell you what works and what combo to use and all is well.
#147
#148
R/C Tech Elite Member
iTrader: (28)
as a note, the Top lipos are much cheaper than others I've seen:
http://www.topracingusa.com/batteries.htm
#149
Tech Master
iTrader: (8)
Below is a video of our 1/12 A-main on Saturday, and the magenta car (Danny) is running the SMC 3.7V Lipo with a 13.5 for the full 8 minutes against a full main of 4cell 17.5 cars.
He ran a LRP 13.5, LRP TC-Spec ESC, 300mah Lipo receiver pack, and no regulator. We tried removing the red wire from the ESC like KHoff mentioned, but then nothing worked at all. The car did NOT work well with a 5cell NiMH pack, it started to get the "dumping" feeling after less than 5 minutes.
With the Lipo Rx pack, the car lasted the full 8 minutes and did not drop off much. You can see on the last lap that he is right behind the leader (the green car), and they are running the same speed. In fact, the lap times of the NiMH cars dropped off more than his Lipo car.
About 250mah was drained from the 300mah Lipo Rx pack during a run.
He ran a LRP 13.5, LRP TC-Spec ESC, 300mah Lipo receiver pack, and no regulator. We tried removing the red wire from the ESC like KHoff mentioned, but then nothing worked at all. The car did NOT work well with a 5cell NiMH pack, it started to get the "dumping" feeling after less than 5 minutes.
With the Lipo Rx pack, the car lasted the full 8 minutes and did not drop off much. You can see on the last lap that he is right behind the leader (the green car), and they are running the same speed. In fact, the lap times of the NiMH cars dropped off more than his Lipo car.
About 250mah was drained from the 300mah Lipo Rx pack during a run.
+ YouTube Video | |
250 mah being used leads me to believe that the pack was doing a good deal more than what a typical RX pack would. I believe 60ish mah is typical.
#150
I used to charge more than 90mAh into a receiver pack when I ran a digital servo in 12th. It all depends on the track, car, and driver.