Airfield Runway Lighting Systems Precision Approach Path Indicators
The heliport approach path indicator (CHAPI) provides the pilot with a safe and accurate glide slope on final approach to the helipad. A row of CHAPI light housing assemblies (LHAs) placed perpendicular to the approach path are seen by the pilot in combinations of red, green, and white to indicate a path that is too high, too low or correctly on slope.
The CHAPI system has a filter inserted between the white and red filters of each lens to provide a 2° wide green sector that, when visible from both units, signals the proper glide slope angle of 6°. Angle deviations that are too high show one or two white lights, and those that are too low show one or two red lights.
Technical Specifications
| Product Name |
Precision Approach Path Indicators (PAPI) |
| Model No |
CM-HT12/P |
| Input Power |
AC220V |
| Light Color |
White / Red / (Green) |
| Ingress Protection |
IP54 |
| Environment Humidity |
0 - 95% |
| Altitude Compatibility |
≤ 2500m |
| Wind Load Resistance |
80m/s |
| Operating Temperature |
-40℃ ～ 55℃ |
| Net Weight |
30kg |
| Size |
900mm × 784mm × 602mm |
Manufacturing & Facility Showcase
Frequently Asked Questions
What is the main function of the CHAPI/PAPI system?
It provides pilots with visual glide slope guidance during the final approach to a helipad or runway, ensuring the aircraft is at the correct altitude and angle for a safe landing.
Does this lighting system comply with international standards?
Yes, the system is designed to be ICAO compliant, meeting the rigorous safety and performance requirements for international airfield and heliport operations.
What weather conditions can the PAPI lights withstand?
The units feature an IP54 ingress protection rating and are designed to withstand wind loads of up to 80m/s and temperatures ranging from -40℃ to 55℃.
How does the pilot interpret the light colors?
A combination of white, green, and red lights indicates the position: White signals too high, Green signals the correct 6° glide slope, and Red signals the approach is too low.
What is the power requirement for the CM-HT12/P model?
The system operates on a standard AC220V input power, making it compatible with most airport power infrastructure.
Can these lights be used at high-altitude airports?
Yes, the system is rated for operation at altitudes up to 2500 meters above sea level.
Lukas Lighting
