China Civil UAV Theory Questions — Questions 134–142

Floating down is an airship recovery method, not a UAV recovery method. UAV recovery methods include: (1) parachute recovery; (2) aerial recovery; (3) landing-gear rollout landing; (4) arresting-net or skyhook recovery; (5) air-cushion landing; (6) vertical landing recovery (rotorcraft / fixed-wing).

The engine production date does not affect use, so it does not need to be known.

A UAV should not exceed its limit altitude when performing a mission, so option C does not need to be known.

Mission execution does not involve the aircraft at rest, so the zero-drift speed does not need to be known.

Planning the flight route is pre-flight preparation, so choose C. After a flight mission, there are two tasks: (1) review the flight execution process; (2) fill in the flight log or record book.

Post-landing inspection is of the aircraft; weather is the external environment, so choose C. Post-landing inspection has four items: (1) aircraft exterior inspection; (2) fuel-powered aircraft require a weighing inspection; (3) system power checks; (4) download flight parameters and check them.

Study note: the words locally fragile are the key. Only some UAVs have landing gear partly designed as a fragile structure, allowed to break on ground impact to absorb energy. But it is not the case that most landing-gear rollout UAVs use this method.

Study note: choose the container option. (1) Hand launch: the simplest; UAVs are small and light (under 7 kg); (2) zero-length launch: relies on a booster rocket to take off, and is one of the most widely used ground launch methods (zero-length, catapult); (3) catapult launch: installed on a rail launch device, catapulted by compressed air, rubber bands, or a hydraulic device; after leaving the launch device, it completes its flight mission under the main engine (a common trap). It is one of the most widely used ground launch methods (zero-length, catapult); (4) landing-gear rollout takeoff: similar to a manned aircraft; large aspect-ratio wing UAVs, especially long-endurance UAVs, usually use it. (The wing structure requires that takeoff acceleration not be too fast); (5) aerial launch: the mother aircraft carries the UAV to a specific altitude and speed to launch it, with high mobility, a large range of launch points, and reduced fuel and range requirements; small, light UAVs commonly use it; (6) container launch: serves both to launch and to store. Commonly used for light UAVs, military; (7) vertical takeoff: rotor vertical takeoff, fixed-wing vertical takeoff. Rotor UAVs widely use it.

Study note: do not evaluate other people. After a flight mission, there are two tasks: (1) review the flight execution process; (2) fill in the flight log or record book.