Wind tunnel and elevator: what they have in common

1. Step 1. Wind tunnel — is used in — Wright Flyer. The Wrights built their own wind tunnel.
2. Step 2. Wright Flyer — uses — Railway track. The Flyer had no wheels: it took off along a wooden rail.
3. Step 3. Railway track — is used in — Funicular. Rails.
4. Step 4. Funicular — has part — Wire rope. A cable.
5. Step 5. Wire rope — is part of — Elevator. The car hangs on cables.

Open Evothings