Steel plough and heron’s aeolipile: what they have in common

1. Step 1. Steel plough — is used in — Tractor. Ploughing with a tractor.
2. Step 2. Tractor — has part — Transmission (gearbox). A transmission.
3. Step 3. Transmission (gearbox) — includes — Automatic transmission. A gearbox.
4. Step 4. Automatic transmission — has part — Torque converter. A torque converter.
5. Step 5. Torque converter — has part — Turbine. The turbine wheel.
6. Step 6. Turbine — evolved from — Heron’s aeolipile. The aeolipile is the oldest ancestor of the steam turbine.

Open Evothings