Posted by MarkB_MI on August 23, 2016 at 02:44:28 from (70.194.12.106):
A few days back there was a discussion of the venerable 2-stroke GMC diesel engine, and how it has managed to survive for so long despite the introduction of more modern and efficient engines.
Last weekend my wife and I visited the USS Silversides, a WWII submarine on display in Muskegon, MI. I found the engines interesting; they're 9-cylinder Fairbanks-Morse 38D8-1/8 diesels. These are 2-stroke opposed-piston engines developed in the 1930s. They have neither heads nor valves, just intake and exhaust ports scavenged by a Roots blower.
Doing a little research, I was surprised to find that these engines are still in production! In fact, many nuclear subs use them as standby power. The Jimmy diesel, with its 57-year production run, is a mere flash-in-the-pan compared to the F-M 38D8-1/8.
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Today's Featured Article - Hydraulics - Cylinder Anatomy - by Curtis von Fange. Let’s make one more addition to our series on hydraulics. I’ve noticed a few questions in the comment section that could pertain to hydraulic cylinders so I thought we could take a short look at this real workhorse of the circuit. Cylinders are the reason for the hydraulic circuit. They take the fluid power delivered from the pump and magically change it into mechanical power. There are many types of cylinders that one might run across on a farm scenario. Each one could take a chapter in
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