Ok here is my first motorized large model. I say large as the other ones were Airfix and revel type warships that were smaller. This had no RC control. No switch, no stuffing tube and no ballast or pump . The only thing it had was a skinny drive shaft attached to a small single motor via a rubber tube and a oversized plastic 2 blade propeller. There was no grease in shaft alley. It ran on a pair of D Batteries. It had a bad lean so 3 quarters were duct taped to the port side to right it. To start the model the wire leads were wrapped or hooked around each other and then you launch it. You hope that it would sail towards the shore to be recovered. It worked fine till it began to take on water when it eventually sank and Ducks had their way with it. I paid a kid dollars to wade out and get it for me. The Lindberg Tirpitz operated the same way however we did install a 2 ch radio control from a car into the hull. That was my first RC boat. The 1/350 Iowa followed with a better 2 ch and it was prepared better for RC running. But before the combat boats this is how I sailed my models at the pond. Prior to making them move I used to launch them in a stream and follow them down . They mostly made it but bashed up by rocks and such. This Hood model was packed with Styrofoam and launched at a large lake where it sailed out of sight and eventually disappeared. Before this we used to anchor the models and attach balsa blocks to their hull sides with rubber bands and take turns shooting at them from shore with a Daisy BB rifle. That was our version of BB shooting ships. Till we found out about RC CBT.