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2. Aircraft approach category - Wikipedia

   en.wikipedia.org/wiki/Aircraft_approach_category

   An aircraft approach category is a grouping which differentiates aircraft based on the speed at which the aircraft approaches a runway for landing. They are used to determine airspace, obstacle clearance and visibility requirements for instrument approaches. [1] : . II-5-1-3.

3. Emergency Landing - Wikipedia

   en.wikipedia.org/wiki/Emergency_Landing

   Emergency landing is an unplanned landing by an aircraft. Emergency Landing may also refer to: Emergency Landing (1941 film), an American film directed by William Beaudine. Emergency Landing (1952 film), a Norwegian film ( Nødlanding ), directed by Arne Skouen. Emergency Landing (2023 film), a Russian film with Russian title Na solnce, vdol ...

4. Instrument landing system - Wikipedia

   en.wikipedia.org/wiki/Instrument_landing_system

   Instrument landing system. In aviation, the instrument landing system ( ILS) is a precision radio navigation system that provides short-range guidance to aircraft to allow them to approach a runway at night or in bad weather. In its original form, it allows an aircraft to approach until it is 200 feet (61 m) over the ground, within a mile (800 ...

5. Landing gear - Wikipedia

   en.wikipedia.org/wiki/Landing_gear

   The landing gear represents 2.5 to 5% of the maximum takeoff weight (MTOW) and 1.5 to 1.75% of the aircraft cost, but 20% of the airframe direct maintenance cost. A suitably-designed wheel can support 30 t (66,000 lb), tolerate a ground speed of 300 km/h and roll a distance of 500,000 km (310,000 mi) ; it has a 20,000 hours time between overhaul and a 60,000 hours or 20 year life time.

6. V/STOL - Wikipedia

   en.wikipedia.org/wiki/V/STOL

   A vertical and/or short take-off and landing ( V/STOL) aircraft is an airplane able to take-off or land vertically or on short runways. Vertical takeoff and landing (VTOL) aircraft are a subset of V/STOL craft that do not require runways at all. Generally, a V/STOL aircraft needs to be able to hover. Helicopters are not considered under the V ...

7. Reusable launch vehicle - Wikipedia

   en.wikipedia.org/wiki/Reusable_launch_vehicle

   Existing examples are systems which employ winged horizontal jet-engine powered liftoff. Such aircraft can air launch expendable rockets and can because of that be considered partially reusable systems if the aircraft is thought of as the first stage of the launch vehicle. An example of this configuration is the Orbital Sciences Pegasus.