How Putt Putt Engine Work (diaphragm type)
Though relatively simple construction, putt putt engines ingeniously harness several principles of physics to push the boat and make raucous boat noises.
Copper Coil Engine
The advantage of the copper tubing engine is the relative ease of construction, and you cannot wreck it with too much heat. The disadvantage of the coil design is that it is often slower and makes little or no noise.
