Fire truck and steam turbine: what they have in common

1. Step 1. Fire truck — has part — Centrifugal pump. A fire pump.
2. Step 2. Centrifugal pump — is part of — Liquid-propellant rocket engine. Turbopumps deliver the propellant.
3. Step 3. Liquid-propellant rocket engine — has part — De Laval nozzle. A nozzle.
4. Step 4. De Laval nozzle — evolved from — Steam turbine. De Laval invented the nozzle for a steam turbine.

Open Evothings