F-1 rocket engine and electric fan: what they have in common

1. Step 1. F-1 rocket engine — is part of — Saturn V. Five kerosene–oxygen engines on the first stage.
2. Step 2. Saturn V — uses — Liquid-propellant rocket engine. All stages use liquid-propellant engines.
3. Step 3. Liquid-propellant rocket engine — has part — Centrifugal pump. Turbopumps deliver the propellant.
4. Step 4. Centrifugal pump — has part — Impeller. The impeller accelerates the liquid.
5. Step 5. Impeller — is part of — Electric fan. A fan's blades are an impeller that pushes the air.

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