Originally Posted by
NZDave
That is a big powerful servo and will require a very high current. I don't know how many amps but Futaba feel it is too much for the BEC in the esc. They also say you can't use it with dry batteries due to its high current.
Yup, it's a powerful servo for sure, and Futaba tends to be relatively accurate in their stated specs. I run their CT701 low-profile with an XR10 without issue, and it too has warnings about BEC use. That said, the CB701 likely pulls a significant amount more current when under heavy load. Perhaps it's best suited to nitro setups where a receiver pack is standard.
Originally Posted by
Roelof
The drawn current is no steady given value, it is depending of how much power it needs to provide. While they can provide up to 40kg force a Buggy will do well with a 12kg power servo.
Beside that ESC's for 1/8 scale use already have higher current rated BEC's
Right, and I'm not a racer (yet), so won't be too hard on electronics. It's more torque than I need for sure, but I'm a 10PX user so it's nice to run Futaba servos in my nicer builds. I run the CT702 with success (off the HW BEC) but I'm not keen on running a low-profile servo in a 1/8 buggy.