Glider and screw press: what they have in common

1. Step 1. Glider — evolved into — Aeroplane. The Wrights added an engine to a glider.
2. Step 2. Aeroplane — has part — Propeller. Propeller aircraft.
3. Step 3. Propeller — uses — Screw. A propeller “screws” itself into the water, like an Archimedes’ screw.
4. Step 4. Screw — is used in — Screw press. The force is produced by turning a screw.

Open Evothings