Precision Approach Path Indicator (PAPI Light) is a light system on the side of the airport runway threshold that provides visual descent guidance information during the final approach, used to guide the aircraft to approach the runway at an appropriate altitude. Its usually located on the left side of the runway, about 300 meters from the runway landing threshold.
This LED airport lights designed to accommodate the steep descent angle and cautious speed of helicopters.
Its usually available in red and white colors, showing two wide horizontal beams of light in different colors. Its projected into the approach flight pattern in a fan-shaped array. PAPI Lights can also be equipped with an optional solar system.
LED Precision Approach Path Indicator Parameters
Model | YFFY-PAPI-300 |
Type | HP-PAPI Light Aviation Obstruction Lights |
Lamp Body Material | Aluminum alloy |
Light Source | LED |
Lighting Solutions Service | Lighting and circuitry design |
Color Rendering Index(Ra) | 80 |
Support Dimmer | Yes |
Lifespan | 100000 hours |
Input Voltage(V) | AC220V, DC24V |
Lamp Luminous Flux | 100 (lm) |
Lamp Luminous Efficiency | 100 (lm/w) |
Emitting Color | Red / White |
Base Type | Other |
Azimuthr Range(degree) | 8° |
Working Mode | Steady burning |
Operation Mode | 24 hours operation |
Weight(kg) | 18 |
Ambient Temperature(℃) | -35~80℃ |
Wind Speed | 80m/s |
Waterproof | IP67 |
Compliance | ICAO |
Warranty(Year) | 2-Year |
PAPI Light Installation Features
- The precision approach path indicator consists of four units. Specific features are as follows:
- The units should be fragile but not susceptible to jet impact.
- The inner edge should be located 15 m (49 ft) from the edge of the runway and not less than 14 m (46 ft) from any runway or taxiway.
- The distance between units should be 9 m (30 ft).
- A simplified system A-PAPI can be used for certain categories of aircraft operations. It consists of two units, with the inner unit located 10 m (33 ft) from the edge of the runway.
- The PAPI lights should be located on the left side of the runway at right angles to the runway centerline. However, they can be located on the right side of the runway if required. The red light is always located on the side closest to the runway.
- If the PAPI airfield lights are located on the right side of the runway (non-standard), the red light is located on the left side.
- In some locations, airfield PAPI lights are installed on both sides of the runway, but this level of installation exceeds the requirements of the International Civil Aviation Organization (ICAO).
- For a typical 3 degree approach slope, the angles of the PAPI light should be as follows: 3°30′, 3°10′, 2°50′, 2°30′ (3.50°, 3.17°, 2.83°, 2.50°)
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