Not sure which trim is used on the -14, but on my -8 I tested the Ray Allen trim motor using a 9 volt battery. Runs slower than normal, but good for testing. Good luck with your build!
Right. It is 12 Volts, not 12 amps. Use a car battery. You can add power and run it in both directions.
Car battery works, but nowhere near as convenient as a 9 volt (as someone mentioned above). Yup - runs slower, but it lets you know that it is working.