събота, 6 септември 2014 г.

Various Types Of Helipad Lighting

By Jody Leach


Surface level heliports are those for helicopters and are located on the ground. They are characterized by usage of large space. The typical heliport has various helipads. These are the areas that are smooth and flat and are devoted to landing and taking off of helicopters. They are normally located near conventional airports but are in lesser-used areas. Helipad lighting is very important and consists of various forms of lights.

Identification of the helipad is very important, which is why beacon lights are used. Provision of the beacons is important in the event that long-range visual guidance is thought to be important. These lights have to be placed in elevated areas so that there is no chance of the pilot getting dazzled at short range. Repeated series of white flashes are emitted by the beacon light. These flashes are spaced at equal intervals. They are in the form if letter H, with the Morse code used.

The beacon lights show at all azimuth angles with an intensity greater than 2500 candelas. Brilliancy control setting is 3 percent, 10 percent and 100 percent. For the illumination of lift off and touchdown area, floodlights are used. Floodlights are so placed as to avoid glare to the pilot or persons working around the heliport. Their horizontal luminance ought to be about 10 lux. Further, floodlights serve to illuminate obstacles. A floodlight used for illuminating obstacles should have luminance of 10cd/m2 at a minimum.

FATO lights are supposed to be placed at the edges of the FATO (final approach and take-off area). The lights should be steady, white, omnidirectional with an intensity of 100 cd and more. The brilliancy control setting ought to be 10, 30 and 100 percent. They normally are placed along the edges of the FATO at uniform spacing.

The touchdown and lift off areas, TLOF, also needs lighting. This is where TLOF lights come in handy. These are green, steady and omnidirectional. Their intensity has to be 30 candelas and more and are placed at the TLOF edges. A distance of 1.5m is left on the edges. For surface-level helicopters, lights ought to be uniformly placed at intervals that should not exceed 5m. Lights that are rectangular in shape should be 12 in number and the circular ones around 14.

The direction of approach is displayed using approaching lights. These are placed on a straight line on the preferred direction. They are supposed to be steady and omnidirectional. They should be flashing in case the helipad cannot be easily identified because of lots of light around.

Aiming lights come in handy when it comes to approaching particular points before going to the TLOF. They are usually steady, white and omnidirectional. Their intensity is above 100 candelas. Their brilliancy control is similar to other lights.

For the display of the windsock and direction of the wind, windsock lights are used. Heliports are supposed to have at least one indicator of wind direction. The one to be used at night has to be illuminated.




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