Wooden tone bars and aeroplane: what they have in common

1. Step 1. Wooden tone bars — is part of — Xylophone. Wooden bars tuned by length.
2. Step 2. Xylophone — uses — Resonance. Resonating bars.
3. Step 3. Resonance — is used in — Valve trumpet. Resonance of the tube.
4. Step 4. Valve trumpet — has part — Valve. Valves.
5. Step 5. Valve — is part of — Internal combustion engine. Valves let in the mixture and let out the gases.
6. Step 6. Internal combustion engine — is part of — Aeroplane. Piston aero engines.

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