Nuclear icebreaker and windlass: what they have in common

1. Step 1. Nuclear icebreaker — has part — Propeller. Propellers.
2. Step 2. Propeller — evolved from — Archimedes’ screw. The first propellers by Smith and Ericsson were a variation on the Archimedes’ screw.
3. Step 3. Archimedes’ screw — has part — Crank. A handle or rotary drive.
4. Step 4. Crank — is used in — Windlass. The handle of a windlass is a crank.

Open Evothings