Battery for E-flite J-3 Cub

Battery for E-flite J-3 Cub

Pete or Anyone,
I have an E-flite J-3 Cub 25 ARF, I'm trying to install a 2826/6 EMax Brushless Outrunner Motor with the EMax 60 Amp ESC. It calls for a 4 Cell 14.8 Volt 4000 MAh Battery but this battery is too big for the battery compartment on this airplane - can I use the battery that E-flite calls for, 25 power motor which is the 3 cell 4200 Mah with the 2826/6 EMax motor?
Thank You
AC McLeod

Comments for
Battery for E-flite J-3 Cub

Click here to add your own comments

Dec 26, 2009

Re: Battery
by: Pete

I've just been searching for the specifications for that EMax motor but can't find them online - do you have a link to that motor? It may well be very underpowered with a 3S if it's designed for a 4S pack. Is there no way you can modify the battery compartment?

Jan 25, 2010

2.4 GHz
by: AC

I Purchased the Parkflyer large scale 182 foam RTF, it has brushless motor 950kv with 50 Amp ESC. I changed it over to a 2.4GHz, everything works fine except the 950kv motor it will start some times and run for a few seconds then stops, try to start the motor again will not start again.
I'm using the Exceed 6 channel FS-CT6X Receiver and Transmitter which is 2.4GHz will this work or do I need another ESC?

Jan 26, 2010

2.4GHz
by: Pete

Changing the radio over to 2.4GHz shouldn't really make a difference to the ESC and motor operation, so long as the ESC can plug directly in to the throttle slot of the Rx.
I would say it's more than likely a problem with the motor or ESC itself, or even the battery pack not being charge properly - if the pack is at the LVC (low voltage cutoff) point of the ESC then the motor will stop and start repeatedly as the pack voltage fluctuates around the LVC.

Click here to add your own comments