Approach and Runway Lighting Systems The Need.
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Transcript of Approach and Runway Lighting Systems The Need.
VISUAL LANDING AIDS
• Approach Lighting Systems (ALS)– A series lighting systems– Omni-directional Approach Lighting System
(ODALS)– Lead-In Lighting System (LDIN)– Runway End Identifier Lights (REILs)
• Runway Lighting• Taxiway markings
CHARACTERISTICS OF A GOOD APPROACH LIGHTING
SYSTEM
• Centerline guidance
• Roll guidance
• High intensity / controllable intensity
• Adequate length
• Sequenced flashers
“A” SERIES LIGHTING SYSTEMS
BUILDING BLOCKS• Centerline lights• 1000’ Roll bar• Side row bars• 500’ Roll bar• Termination bar• Wing bars• Sequenced flashers• Runway Alignment Indicator Lights (RAILs)
Threshold lights
( A row of green lights on 5 foot centers extending across the runway threshold and outwards a distance of approximately 45 feet from the runway edges )
Centerline lights
( 13.5 feet wide with 5 evenly spaced lights )
2400 feet long if glideslope is 2.75 deg or greater
3000 feet long if glideslope is less than 2.75 deg
military field may be as short as 2000 feet
Simplified (spacing goes to 200 ft)
1000’ roll bar only has 15 lights
Last centerline light at 1400 ft
RUNWAY LIGHTING
• Runway Edge Lighting– HIRL, MIRL, LIRL
• Touchdown zone lighting
• Centerline lighting
• Taxiway lighting