Читать книгу Introduction to UAV Systems - Mohammad H. Sadraey - Страница 28

Launch and recovery can be accomplished by a number of techniques ranging from conventional takeoff and landing on prepared sites to vertical ascent/descent using rotary wing or fan systems. Catapults using either pyrotechnic (rocket) or a combination of pneumatic/hydraulic arrangements are also popular methods for launching air vehicles. Some small UAVs are launched by hand, essentially thrown into the air like a toy glider.

Nets and arresting gear are used to capture fixed‐wing air vehicles in small spaces. Parachutes and parafoils are used for landing in small areas for point recoveries. One advantage of a rotary‐wing or fan‐powered vehicle is that elaborate launch and recovery equipment usually is not necessary. However, operations from the deck of a pitching ship, even with a rotary‐wing vehicle, will require hold‐down equipment unless the ship motion is minimal.