How is the Spektrum AR636 powered?
 

I have used the Spektrum AR410 with an esc and bec with the bec power plug placed in the batt port. When I look at the inputs for the Spektrum AR636 according to the manual, port on far left is for binding, port 1 for throttle, port 2 for aileron, port 3 for elevator, and port 4 for rudder. Remaining ports are for aux inputs.

Where does the AR636 get its power? my bec plug seems useless.

What am I missing?

Thanks,

Terry

Use the bind port or any unused servo port

That's used mostly in small electric planes which get their power from the ESC/Throttle channel plug.