Across
- 2. To set or thrust in motion.
- 5. A type of aircraft deriving both lift and propulsion from one or two sets of horizontally revolving rotors.
- 7. A power-driven aircraft kept buoyant by a body of gas (usually helium) which is lighter than air.
Down
- 1. A short, easily-remembered slogan, verse, or tune.
- 3. Engineer Design machines that fly.
- 4. Air Balloon
- 6. plan A powered heavier-than-air aircraft with fixed wings from which the aircraft derives most of its lift.