Originally Posted by Riot
Thanks for all the comments. One question do I need an upgraded ESC to go 4s?
Joe, video says you are using a 30amp?
On that particular plane, I am using a 30A esc. The stock ones can be flown on 4s but they will be at the limit with no headroom left over. Some stock ESCs live, others fry. It seems like the majority of the stock escs live as long throttle management is used. That doesn't mean pin the throttle at wide open for the whole flight...... it means that some wide open mixed with 3/4 throttle cruising. If you like to run wide open for the majority of the time, then at the very least you should bypass the internal bec and run an external bec to take some of the load and heat away from the stock esc. They are rated for 20A and on 4s that combo pulls 20-21A wide open, so there isn't much of a tolerance there. A 30A esc offers less of a chance of hitting a thermal shutdown or worse, cooking the esc.