8/31/2023 0 Comments Malsr lights![]() ![]() Three light bars (5 steady-burning white lamps on each) that form a crossbar Serves several functions Enables you to determine your physical location from the runway On glideslope, when the decision bar passes directly underneath you, you should be approximately 100 feet above the TDZE Decision bar is 1,000 feet from the threshold and will generally appear to slip below the airplane's nose at DH Serves as an artificial horizon to help transitioning from IMC to VMC at decision height Decision bar's horizontal spread of white lights acts like an external attitude indicator, providing you with visual bank references Reference point used as a distance-to-go markħ ALS Components Decision Bar and Light BarsĪllows you to make in-flight visibility estimates Distance from the decision bar at DH MALSR light bars are spaced at 200 foot intervals ALSF 1 / 2 light bars are spaced at 100 foot intervals Flashing white lights will stop at or before the decision bar (from the approach side)ĭecision Bar acts as an external bank indicator and assists in the transition from Instruments to visualĩ ALS May Allow You to Determine VisibilityĪt a standard decision height of 200’ AGL for an ILS Category I approach you will be approximately 3,846’ from the runway touchdown zone, or 2,846’ from the runway threshold on a 3° glide path, if the reported visibility is ½ SM or 2,500’ - you will see very little of the runway environment, if any, other than approach lights Knowing the type of lights to expect can help you identify the correct runway and avoid landing on the wrong runway at an airport with parallel runways If you know the type of approach lighting available, other lighting in the airport’s vicinity is less likely to cause confusionĤ ALS Components Threshold Bar - All ALSs begin with a row of green lights that indicate the approach end of the runway Runway Alignment Indicator Light (RAIL) consists of five sequenced white strobe lights located on the extended runway centerline, the first being located 200 feet beyond the approach end of the last steady-burning light bar (generally 1,000’ from the threshold) with successive strobes at each 200-foot interval out to 2,400 feet from the threshold (may extend to 3,000 feet) Sequenced Flashing Light (SFL) White sequenced strobe lights located on the last three light bar stations The RAIL and SFL strobes flash in sequence twice per second producing a ball of light streaking toward the approach end of the runway Click on picture to play the videoĥ ALS Components RAIL and SFL provide early identification and alignment / displacement information when approaching a runway RAIL are not imbedded in the approach lights Usually installed on a runway with an instrument approach procedure The responsibilities of DY Consultants included lighting station and shelter-siting coordination with safety area improvements designs for new light bar structures with steady-burning light bars, sequenced flasher lights, or both electrical load analysis of the MALSR system requirements recommendations for rehabilitation, replacement of existing structures, or both and site preparation and grading, with specific attention to equipment within and adjacent to the runway safety area.The ALS is an airport lighting system that projects light in a directional pattern to help a pilot (i) identify a runway and (ii) align the aircraft with the runway on final approach and landing that: Is installed at the approach end of a runway Extends outward from the runway Consists of: Series of light bars Strobe lights, or a combination of the two. ![]() The project was coordinated with the Runway Safety Area Study (RSA). DY Consultants acted as a sub-consultant to Urban Engineers for this project, which consisted of replacing the existing Simplified Short Approach Lighting System with Sequenced Flashers (SSALSF) with a MALSR. The replacement of the Medium-intensity Approach Lighting System with Runway Alignment Indicator Lights (MALSR) resulted in lower minimum visibility requirements and increased the number operations by better-equipped aircraft. Due to the failing infrastructure of the existing approach lighting system for Runway 8 at Capital City Airport, Susquehanna Area Regional Airport Authority (SARAA) officials decided to replace the existing system.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |