Opduwer 1/4,5

For a model builder friend from the Netherlands, I built two identical pushers in 1/4.5 scale in just under three months. They were 1.25 m long and weighed over 30 kg ready to sail.

According to all the displacement tables, the maximum displacement would have been 22 kg, so you can see what all those regulations are worth.
My friend was trying to get him to run on a homemade steam engine. Unfortunately, it didn't come to that due to medical problems and his death.
My model was powered by a homemade, heavy, water-cooled electric motor. Afterward, I used a nozzle, which improved steering.
Once it was completely finished, I modified it to a free model and tested it extensively. My model sailed very well and was very stable on the water. Due to family problems, the project came to an early end.