Ground effect and watt steam engine: what they have in common

1. Step 1. Ground effect — is a kind of — Lift. A kind of lift.
2. Step 2. Lift — is used in — Wind turbine. The blades are wings that create lift.
3. Step 3. Wind turbine — has part — Planetary gear. A gearbox raises the speed.
4. Step 4. Planetary gear — is part of — Watt steam engine. Watt’s “sun and planet” gear got around the patent on the crank.

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