Sidecar motorcycle and parachute: what they have in common

1. Step 1. Sidecar motorcycle — evolved from — Motorcycle. A motorcycle with a sidecar.
2. Step 2. Motorcycle — has part — Pneumatic tyre. Pneumatic tyres on both wheels.
3. Step 3. Pneumatic tyre — is part of — Landing gear. Aircraft tyres.
4. Step 4. Landing gear — includes — Retractable landing gear. Landing gear.
5. Step 5. Retractable landing gear — uses — Drag. Retracting reduces drag.
6. Step 6. Drag — is used in — Parachute. The canopy creates drag.

Open Evothings