Aircraft Landing Lights


Overview

Almost all modern aircraft are equipped with landing lights if they are intended and approved for nighttime operations. Landing lights are usually of very high intensity because of the considerable distance that may separate an aircraft from terrain or obstacles; the landing lights of large aircraft can easily be seen by observers from several miles away.

In the design of landing lights, key considerations are intensity, reliability, weight, and power consumption. Ideal landing lights are extremely intense, require little electrical power, are lightweight, and have long and predictable service lives. Technologies used in past and present have included ordinary incandescent lamps, halogen lamps, various forms arc lamps and discharge lamps, and LED lamps.

Landing lights on a Royal Jordanian Airbus A310, two on the nose undercarriage leg and two on the wings. Click on the picture to see them more clearly.

Landing lights are typically only useful as visibility aids to the pilots when the aircraft is very low and close to terrain, as during take-off and landing. Landing lights are usually extinguished in cruise flight, especially if atmospheric conditions are likely to cause reflection or glare from the lights back into the eyes of the pilots. However, the brightness of the landing lights makes them useful for increasing the visibility of an aircraft to other pilots, and so pilots are often encouraged to keep their landing lights on while in flight below certain altitudes or in crowded airspaces. One convention is for commercial aircraft to turn on their landing lights when changing flight levels.

Landing lights are sometimes used in emergencies to communicate with ground personnel or other aircraft, especially if other means of communication are not available (radio failures and the like).

Legal considerations

In many jurisdictions the landing light fixtures in the aircraft and the lamps they use must both be certified for use in a given aircraft by a government authority.

The actual use of landing lights may or may not be required or forbidden by local regulations, depending on time of day or night, weather, airport conditions, aircraft conditions, the type of operation being carried out (take-off, landing, etc.), and other factors.

In the United States, for example, landing lights are not required to be present or used for many types of aircraft, but their use is strongly encouraged, both for take-off and landing and during any operations below 10,000 feet (3,000 m) MSL or within ten nautical miles of an airport. For transport category aircraft and some operations with other types of aircraft, landing lights are required to be present and used. Landing lights must be certified safe and adequate for their purpose before installation.

See also

Aircraft warning lights

Aviation navigation lights

References

Federal Aviation Administration (U.S.), Aeronautical Information Manual, FAA, March, 2007

Federal Aviation Administration (U.S.), Airplane Flying Handbook (FAA-H-8083-3A), FAA, 2004

Federal Aviation Administration (U.S.), Air Traffic Control (Order 7110.65R), February 16, FAA, 2006

Federal Aviation Administration (U.S.), Instrument Procedures Handbook (FAA-H-8261-1), FAA, 2004

Federal Aviation Administration (U.S.), Pilot’s Handbook of Aeronautical Knowledge (FAA-H-8083-25), FAA, 2003

Murphy, Kevin D. and Bell, Leisha, “Airspace for Everyone,” Safety Advisor, Regulations 1 (SA02-9/05), AOPA Air Safety Association, September 2005

v d e

Aircraft components and systems

Airframe structure

Cabane strut  Canopy  Cruciform tail  Empennage  Fairing  Fabric covering  Flying wires  Former  Fuselage  Interplane strut  Horizontal stabilizer  Jury strut  Leading edge  Longeron  Nacelle  Rear pressure bulkhead  Rib  Spar  Stabilizer  Stressed skin  Strut  Tailplane  Trailing edge  T-tail  Twin tail  Vertical stabilizer  V-tail  Wing root  Wing tip

Flight controls

Aileron  Airbrake  Artificial feel  Autopilot  Canard  Centre stick  Deceleron  Elevator  Elevon  Electro-hydrostatic actuator  Flaperon  Flight control modes  Gust lock  Rudder  Servo tab  Side-stick  Spoiler  Spoileron  Stabilator  Stick pusher  Stick shaker  Trim tab  Yaw damper  Wing warping  Yoke

High-lift and aerodynamic

devices

Blown flap  Dog-tooth  Flap  Gouge flap  Gurney flap  Krueger flaps  Leading edge cuff  LEX  Slats  Slot  Stall strips  Strake  Vortex generator  Wing fence  Winglet

Avionic and flight

instrument systems

ACAS  Air data computer  Airspeed indicator  Altimeter  Annunciator panel  Attitude indicator  Compass  Course Deviation Indicator  EFIS  EICAS  Flight data recorder  Flight management system  Glass cockpit  GPS  Heading indicator  Horizontal situation indicator  INAS  TCAS  Transponder  Turn and bank indicator  Pitot-static system  Radar altimeter  Vertical Speed Indicator  Yaw string

Propulsion controls, devices and

fuel systems

Autothrottle  Drop tank  FADEC  Fuel tank  Gascolator  Inlet cone  Intake ramp  NACA cowling  Self-sealing fuel tank  Throttle  Thrust lever  Thrust reversal  Townend ring  Wet wing

Landing and arresting gear

Autobrake  Conventional landing gear  Arrestor hook  Drogue parachute  Landing gear extender  Tricycle gear  Tundra tire  Undercarriage

Escape systems

Ejection seat  Escape crew capsule

Other systems

Aircraft lavatory  Auxiliary power unit  Bleed air system  Deicing boot  Emergency oxygen system  Environmental Control System  Hydraulic system  Ice protection system  Landing lights  Navigation light  Passenger service unit  Ram air turbine

v d e

Lists relating to aviation

General

Timeline of aviation  Aircraft (manufacturers)  Aircraft engines (manufacturers)  Rotorcraft (manufacturers)  Airports  Airlines (defunct)  Civil authorities  Museums

Military

Air forces  Aircraft weapons  Missiles  Unmanned aerial vehicles (UAVs)  Experimental aircraft

Accidents/incidents

General  Military  Commercial (airliners)  Deaths

Records

Airspeed  Distance  Altitude  Endurance  Most-produced aircraft

Categories: Aviation terminology | Aircraft components | Aviation lights

I am an expert from China Bags Wholesale, usually analyzes all kind of industries situation, such as jewellery making tools , jewelry pliers.