Steve, as a retired dealership mechanic, I had access to Ford engineering department. We tore down engines that had been consuming oil, and found in nearly every case that the ring gaps were lined up. Those that were not had other obvious reasons to use oil.
The position that you find the ring gaps in does not prove that they moved in operation. Imprint of the ID marks on the piston's ring lands is proof that they stay where they were initially installed. Also keep in mind that there is no exact position for the rings to be in when installed. Different people on the assembly lines tend to do things differently. Many times not even consistently one particular way.
Oil ring gaps are always staggered when installed. If you find one that is not, does that mean that it moved? Or did the installer not follow instructions when the rings were originally installed?
As far as 2-stroke engines go, some are pinned while some are not. I have taken a few apart that were not pinned. and if you go back far enough, you will find that there were 4-stroke engines that had piston rings pinned in place. Hudson comes to mind. There were probably others as well.
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Today's Featured Article - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
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