Space probe and internal combustion engine: what they have in common

1. Step 1. Space probe — is a kind of — Artificial satellite. A spacecraft.
2. Step 2. Artificial satellite — has part — Reaction wheel. Attitude control.
3. Step 3. Reaction wheel — is a kind of — Flywheel. A flywheel.
4. Step 4. Flywheel — is part of — Internal combustion engine. The flywheel smooths out the engine’s strokes.

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