Comments by "William Cox" (@WildBillCox13) on "Would Stalin attack the West? Operation Unthinkable 1945" video.
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The Allies (USA) were also, as they had (before the war) to Japan, supplying ALL of the Soviet Union's "hi-test" gasoline additives (i.e.: lead based); thus, high octane aviation fuel for Soviet high performance prop propelled aircraft was only available through deliveries from the west. Remember how Japan reacted when we cut off those supplies in '41? Greg* discusses the differences between low octane and high octane performance-and what nations had access to the necessary components- in detail.
In short, it's all about the maximum power delivered through raising the manifold pressure. Too hot, and you get knock/backfires/predetonation, all of which severely and negatively affect engine efficacy and longevity. Lead additives (the reason why we have/had leaded and unleaded gasoline/petrol-remember?), Water, MW, injection is all about keeping the manifold HEAT down so it can be operated at higher pressures, delivering more power per stroke. Only the USA had lead additives. Germany used MW: 50, et al, to the same purpose. Japan was headed toward avgas disaster the whole time. It's a major reason why she made war with the west.
Here's Greg's channel. https://www.youtube.com/channel/UCynGrIaI5vsJQgHJAIp9oSg/videos Greg "sticks to planes and cars". Hehe.
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