The Weigh In. I found all my lead pucks, so it was time to measure the displacement of the tug hull. So tape off the hole at the end of the prop shaft and fill the bath with water. Put the lead in the boat, but it still wasn’t enough to get her down to … Read more The Steam Tug Part 3.
How Fast to Turn a Propeller. I have a model tug hull with a 60 mm propeller. The question is, how fast should it turn? The starting points for the answer are the propeller pitch, that’s the distance through the water that the propeller would move in 1 turn, all other things being perfect, and … Read more The Steam Tug Part 2.