De Laval nozzle and sickle: what they have in common

1. Step 1. De Laval nozzle — is part of — Ramjet. The nozzle accelerates the combustion products.
2. Step 2. Ramjet — has part — Fuel injector. It injects fuel into the flow.
3. Step 3. Fuel injector — is part of — Diesel engine. It injects fuel into hot compressed air.
4. Step 4. Diesel engine — is part of — Combine harvester. Self-propelled combines run on diesels.
5. Step 5. Combine harvester — evolved from — Sickle. The machine replaced reaping by hand.

Open Evothings