Fact from the video: “It took time for P&W to develop the R-4360 and the world moved on in the processes.” NOTE: 1942, the US was in the middle of war & GE had no reciprocating engine in the fight and the government gave the new jet to GE to develop and prevented P&W from using any time/labor to developed a jet in order to manufacture R-2800 engines that our military was using. At the time these aircraft were purchased P&W engines were used. F-15, F-16, SR-71(world speed record) F-22, F-35, B-52 and many more. Missing in the convoluted explanation of rod and cylinder configuration of the Wartsila R96B is the fact that the cylinder is an enclosed bottle with the, round in cross-section, upper portion of the connecting rod passing through a sealing gland at the bottom of the cylinder bottle. When the piston travels upward, it draws combustion air into the portion of cylinder below the piston. When the piston compresses, fires and starts downward on its power stroke, it simultaneously pushes the air below the piston, up into the combustion chamber, expelling exhaust and charging the combustion chamber with combustion air for the next compression stroke. Amazingly, this 2-stroke engine has an efficiency of around 50% which makes it not only the largest reciprocating diesel engine, but also the most efficient.