Hello; Wonderful opportunity for many viewers to see the really huge engines which power giant machinery/ships/ earth movers and aircraft, nicely filmed, a valuable contribution for those who enjoy mechanical wonders. It's amazing how these engines are still firing up probably just as the first day it came out of the factory. Apparently the engineers of yesteryear knew what they were doing. Impressive engineering. American and British engineering brought world war 2 to an end in the European theater. At 9:09 this is the typical engin that you can find on cargo ship. They are slow but powerfull for the high seas. And by the way, you can fit a car in the oil pan and can fit a man in the piston chamber. At 2:45 can watch that all day. Brilliantly engineered, finely built for such a heavy duty engine. Great sound too. At 2:04 I've seen a Spitfire Merlin engine spin up live several times. It's a visceral and nostalgic experience every time in that it's the sound many WWII pilots lived and died with. I've also seen some of those old diesel threshing machines at country fairs and parades.