An aircraft is a vehicle or machine that is able to fly by gaining support from the air. It counters the force of gravity by using either static lift or by using the dynamic lift of an airfoil, or in a few cases the downward thrust from jet engines.
What does aircraft type mean?
Aircraft Types Definition:
As used concerning the certification, ratings, privileges, and limitations of airmen, it means a specific make and basic aircraft model, including modifications that do not change its handling or flight characteristics.
Why aircraft plural is aircraft?
Aircraft is plural already!!! You would never say aircrafts carrier, you would say aircraft carrier! To reiterate, aircraft is a collective noun because there is more than one type of aircraft (airplanes, balloons, blimps, drones, etc.) so the term "aircraft" can denote all types.