Went to the Diesel House museum to just SEE the mahoosive engine that wasn't due to run today but it turned out that a private party had booked a start-up.
It's an 8 cylinder supercharged 2-stroke double acting engine with sleeve valves above and below the piston. The engine design fell out of favour due to problems with the lower valve/conrod seals. This was evident by the smoke emanating from one cylinder. I think 5 minutes of running time was plenty under the circumstances.
22,500 hp output. Don't know if it appears in the video but the generator just looks like a large enclosed flywheel at the end of the engine. Hard to believe that it can absorb all that power.
Apologies for FB link but having upload problems. I've made it public so it should be viewable by anyone.
formatting link
Tim