Yup. These 40K + HP engines are the size of a house. The bores are big enough for a full grown man to stand inside and the pistons are like oil drums stacked up. 90 rpm is pretty much an upper limit for engines this big and at that size the speed is still pretty impressive. The largest props I’m familiar with are 16 feet in dia and that’s a lot of swinging bronze. Our super carriers use 4 of them. I expect props have gotten bigger than that for these big guys.
Pretty impressive.
I think my nephew’s Frigate (USS Taylor, FFG-50, now decommissioned and sold to S Korea) was propelled by 2 GE gas turbines, through a single shaft and variable pitch propeller. (I’m cheating and looking it up).
Power was 31,000 KW, and would propel the ship above 29 knots.
The ship also had 2 260 kW azimuth thrusters for maneuvering and docking. I think the boys on the Great Lakes might have called them bow thrusters, though that’s assuming that they were positioned at the bow of the ship.
I got a great tour of the Taylor after she returned from what was her last official voyage around 2015-ish. It was quite a tour, though I didn’t get to see any of the guns firing.
I would have loved to have seen that little R2D2 Phalanx dome thing up there firing off some bursts. I’m not sure that the hierarchy at Mayport would have approved of that, though.
Interesting decor on the ship - reminded me of the timeless 1960-70-80 design of large power substations, of which I’ve visited a few dozen over the years. Same comm equipment setup all rack mounted, probably original equipment in some cases.
But I really wanted to see that Phalanx do its thing.