Impeller and kite: what they have in common

1. Step 1. Impeller — is part of — Turbofan. A fan.
2. Step 2. Turbofan — is part of — Jet airliner. Modern airliners use turbofans.
3. Step 3. Jet airliner — has part — Wing. A swept wing.
4. Step 4. Wing — is part of — Glider. Wings.
5. Step 5. Glider — evolved from — Kite. Lilienthal and Cayley studied the wing with kites and gliders.

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