Micro Motor with transparent plug | JV5081

Motorized and replaces any hand-cranked drive. Turns slowly but with torque at the same speed as a hand crank. No additional gearbox is required. It works somewhat unpleasantly loudly, but smoothly.
In my case, it drives all the gears of the Pantasy steampunk airship flawlessly, which is a really tough reality test.
Conclusion: apart from the volume, my honest recommendation.