Van de Graaff generator and windlass: what they have in common

1. Step 1. Van de Graaff generator — is made of — Vulcanized rubber. The belt is rubber.
2. Step 2. Vulcanized rubber — is material for — Penny-farthing. The tyres are solid rubber.
3. Step 3. Penny-farthing — evolved from — Michaux velocipede. A large wheel increased the speed per turn of the pedals.
4. Step 4. Michaux velocipede — has part — Crank. Cranks on the wheel axle.
5. Step 5. Crank — is used in — Windlass. The handle of a windlass is a crank.

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