Usually soem tugboats have these engines. Usually two. But to get any measurable speed, I had to use four. This was just a test to see if they work so it is very low quality of work. The way the motors work is they have many wings (I only used four cause I'm lazy) and they all spin at high speeds under the water. Then at the right moment, the wings turn slightly to give thrust in the right direction. This makes teh boat have a ton of power and maneuverabliity. Which is great. Here we have none of that. There is basically no technology in this game. So I had to compromise. If you look here the wings are usually facing outwards, until they hit a wheel that will send them back so the way ghey are usually facing will be the right way so the boat will move foward. AND IT WORKS!!! It can barely pull it's own weight but IT WORKS!!! I hope this progresses to being more powerful and esier to control. This is the beggnning of new ENGINEeering (worst pun ever). Have fun. (Gve it patience. Just throttle to 100% and wait for any measurable speed. I gave it patience and I was so happy to see that 1mph on there)