| Answer | Crossword Clue |
|---|---|
| AVGAS | Fuel for piston-engine aircraft |
| AVGAS | Fuel for piston-engine airplanes |
| expansion | The increase in the volume of fuel on combustion in the cylinder of an engine, or the piston stroke in which this occurs |
| expansions | The increase in the volume of fuel on combustion in the cylinder of an engine, or the piston stroke in which this occurs |
| ramjet | jet engine operated by the injection of fuel into a stream of air compressed by the forward speed of the aircraft |
| ramjets | jet engine operated by the injection of fuel into a stream of air compressed by the forward speed of the aircraft |
