County Fair
We had a fun time exploring the
Russell County fair today.
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About us: Anna Hess and Mark Hamilton spent over a decade living self-sufficiently in the mountains of Virginia before moving north to start over from scratch in the foothills of Ohio. They've experimented with permaculture, no-till gardening, trailersteading, home-based microbusinesses and much more, writing about their adventures in both blogs and books.
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It's actually quite clever.
The engine has a (usually centrifugal) limiter, that keeps the exhaust valve open and inlet valve closed if the engine is running fast enough.
In that case the engine basically just pumps air, but delivers no power and also uses no fuel.
When the engine speed drops enough, the mechanism disengages and the engine makes a full power cycle again.
This kind of mechanism is kind of making a comeback in (rediculously overpowered) modern cars where say 4 out of 8 cilinders can be disabled to save fuel.