Let's suppose the calculation is right that to get the 1600 hp the steam pressure has to be 3200 psi. Bore is 8", so the piston area is 50.24 square inches and the force on the piston will be 161,000 pounds.
There's a video out there of Harry explaining that in the Mark 5, when the "supercritical" is admitted to the cylinder it literally "explodes".
It won't be sledge hammers pounding on the connecting rods, more like howitzers. And big ones at that.
Anyone at Cyclone actually calculated anything on the engines? Surely you jest!
I see IBES of Dubai, who were going to be selling wood fired steam power systems using Cyclone engines has now disappeared from the web. Frankie put out a PR in 2016 claiming Cyclone was building five more engines for them. Wonder when those will be finished?