After a disappointment in my own shipbuilding skills I’ve bought myself a regular RC boat. The sellers in the shop were quite suprpised at my request for a boat that would go as slow as possible. Also I asked for the biggest battery I can put into it, so it would work for very long time. I suppose they concluded I’m a smuggler or something.
The boat was obviously much better than mine
The only mishap was that I’ve broken the propeller blades somewhat upon encountering a tree branch lying in the pond. On the other hand, I wanted the boat to be slower anyway.