The kit I bought in Japan had a supplemental kit that had a motor and 2-capacitor battery’s
Plus a battery box that plugged in to a jack under the front floorboard
When the kit is done you plugged in the battery pack and charged it up then turned it on the motor and the prop spun
I had the body done and I was starting the wings when the kit was destroyed
The sad part I think I spent 125$ on it in Japan with the electrics but that was 23 years ago