......................... I got that info on squish from gordan jennings book. He's forgot more about two strokes than most of us will ever know. ...............
Gordon Jennings looked at and worked on a lot of two-stroke engines in the 1960s and wrote about many of these engines in the 1970s for Cycle World Magazine. Gordon was good at putting his ideas about how things worked on paper although many of his theories and conclusions to his observations have been proven wrong by engineers and engine developers that have done a lot of dyno and field testing on two-stroke engine. I liked his style of writing and was reading everything that he wrote while I was studying to become an engineer. Gordon Jennings pipe theory and formulas steered a lot of us including myself in the wrong directions for many years. Initially I accepted most of his teaching as divine revelation. As my engineering studies progress I started seeing flaws in some of his teachings.
I started reading SAE papers written by Gordon Blair and his students while I was also studying engineering. The SAE papers were mostly research papers that presented theory and the testing to prove or disprove the theory in question. At that point in my academic career, most of the SAE papers were over my head. As my academic studies progressed Gordon Blair’s research was easier to understand and disproved some of the Gordon Jennings theories and conclusions.
If you really want to learn about two-stroke engine development, read the text books and SAE papers written by Professor Gordon Blair from the from the Queens University in Ireland. Gordon Blair did research projects for all of the major two-stoke engine manufactures around the world from the early 1960s until his retirement in about 1995. Gordon Blair did more during his lifetime to further two-stroke technology than all of the combined research done on two stoke from the early 1900s until his death a few years ago. Gordon Blair’s engineering students are currently working for engine manufactures around the world today and continuing much of the research that Gordon started.
Prerequisites for reading and understanding Gordon Blair's publications are an engineering background, or training at the university level in calculus, differential and partial differential equations, fluid mechanics, gas dynamics, thermodynamics, computer programming, and physics with and emphasis on statics and dynamics.