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flashing landing lights

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Old 23rd Sep 2002, 16:06
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flashing landing lights


I have noticed on some a/c, mostly bizjets, that the landing lights appear to flash alternatively left-right-left etc.
Why do they do this and how is it done?
gurnzee is offline  
Old 23rd Sep 2002, 21:56
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Arrow

Just a guess,
Possibly to aid in scaring birds.

No idea how the engineers have wired it up.
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Old 24th Sep 2002, 03:19
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Used on biz jets,and b737-another black box in the circuit($300)interupes the circuit...Inceases Conspicuity
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Old 24th Sep 2002, 03:58
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Lightbulb

These systems are installed to increase visibility - they work without compare in busy and congested airspace. The alternating light will catch your eye better than any other visual cue available.

They are standard equipment for most helicopter and corporate flight departments in North America. We have them installed in every aircraft we operate.

The system simply uses a controller, to alternate or cycle the lamps. Pretty simple, very effective.



Precise Flight
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Old 24th Sep 2002, 12:34
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Sounds like a good idea to me, but I seem to remember from my air law ATPL theory that an a/c's white flashing landing lights to a station on the ground meant that it was in a possibly hazardous situation and was committed to land.
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Old 24th Sep 2002, 15:37
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Close, MG - the distress signal is to flash the landing lights irregularly.
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Old 25th Sep 2002, 10:05
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So if I've got this right, you not only have radio failure and you have a problem which means you have to land, but also you have to remember to flash the lights irregularly or they will be mistaken for an aid to conspicuity!!?
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Old 25th Sep 2002, 10:36
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Cyclic Hotline

Do you get through more landing lights ? - Does'nt cycling the lamps seriously reduce their life-span ?
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Old 26th Sep 2002, 02:43
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We use them on our B737's. Increased visibility and longer bulb life.

PulseliteŽ also extends lamp life up to 20 times by allowing the filament to run at a lower temperature than normal while maintaining full rated candle power. That's a big savings on maintenance costs.
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