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Anti-nostalgia thread: what are y’all happy is gone and hope never returns?
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this post was submitted on 04 Feb 2025
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I do use a chainsaw for cutting wood to heat. (Although this winter is unpleasantly warm. Thanks, climate change...) There is definitely no way that any electric saw would be able to keep up, esp. since you can't readily drag 500y of extension cord behind you. Chainsaws could absolutely be made cleaner though. Unfortunately, I think that 2-stroke engines have a much higher power:weight ratio than 4-stroke, so we're stuck using gas mixed with oil, which pumps out smog.
I kinda wonder if it would be possible to make a 2 stroke engine that doesn't burn its own oil. Like, essentially supercharge it. Use an impeller on the flywheel to pump air into the cylinder so that the crankcase could be full of heavy oil. Though that might not work with a chainsaw since it has to be held at various angles.
This should explain why two strokes are the way they are, and how you can potentially mitigate some of the problems..
Since you don't have a timing chain on a two stroke, you'd need something else to run a fuel pump.
If engine design interests you, there's a lot of neat stuff in this channel.
That throws a "this video isn't available anymore" page.
Take two.
If that doesn't work, the channel on YouTuber is "Driving 4 Answers", and the title of the video is, "The Only Video You'll Ever Need to Watch to Know how 4 Stroke and 2 Stroke Engines Work and Differ".