One other point about ships that do have and use them all the time. IF, and the IF will happen, you lose the thrusters in a condition where they must not fail to perform, close your eyes, yell " TUG assistance " and kiss you reputation goodbye, so a owner can spend it on something more important.
I have operated and been a passenger in many Hacker mahogany speedboats. They are 23 to 38 feet long and powered by engines of at least 350 to 800 hp. Old style - shaft and prop / very small rudder ( just like the originals) the area of them is your palm. The boats are a joke to dock. Rudder...
By mid August the shallow muck bottom warms the 24" to 30" depth at 4:00 PM to the point of being uncomfortable and checks out at 80F. Idling tied to the dock and neutral playing with it are a real danger.
My field is electronics. I am finishing a 16' wood runabout and want to use the Nissan V6 engine in a closed cooling system to prevent engine problems in the St Lawrence River system. 220 hp - 160F - engine pump discharge I. D. is 2.00". Would like to use a SS shell and tube not to exceed 8'...
I am required to convert the engine from RAW water cooling to a CLOSED cycle system. 220 hp @ block temperature of 160F, engine pump discharge I.D. is 2.0". We would like to stick with a SS shell and tube, Please specify the outer O. D. and GPM with a open intake and discharge on the floor of a...