Main rotor and diesel engine: what they have in common

1. Step 1. Main rotor — is part of — Helicopter. A main rotor.
2. Step 2. Helicopter — has part — Gas turbine. A turboshaft engine.
3. Step 3. Gas turbine — is part of — Tank. Some tanks (T-80, Abrams) have a gas turbine engine.
4. Step 4. Tank — has part — Diesel engine. Most modern tanks are powered by a diesel (the Mark I had a petrol engine).

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