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Q400 Anti-Collision Lights Question  
User currently offlinehotplane From UK - England, joined Jul 2006, 1037 posts, RR: 0
Posted (4 years 6 days 22 hours ago) and read 5739 times:

Maybe a daft question that nobody knows the answer to, but thought I would ask anyway.

Why are the anti-collision lights on the top and bottom of the DHC8-Q400 fuselage/tail white and not red like all other civil airliners?


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12 replies: All unread, jump to last
 
User currently offlineoly720man From United Kingdom, joined May 2004, 6688 posts, RR: 11
Reply 1, posted (4 years 6 days 21 hours ago) and read 5727 times:

I think that with FlyBe being a green airline the lights are low energy red LEDs under a clear cover rather than white bulbs under a red cover.


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User currently offlinehotplane From UK - England, joined Jul 2006, 1037 posts, RR: 0
Reply 2, posted (4 years 6 days 21 hours ago) and read 5723 times:

Hmmm...the light in that shot is red, but all the Flybe machines I've seen definately have white ones.


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User currently offlineoly720man From United Kingdom, joined May 2004, 6688 posts, RR: 11
Reply 3, posted (4 years 6 days 19 hours ago) and read 5681 times:

Digging a bit further, it looks like the fuselage top is red and the under fuselage and top of tail are high intensity white.


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User currently offlinedandaire From UK - Wales, joined Jul 2008, 65 posts, RR: 0
Reply 4, posted (4 years 6 days 18 hours ago) and read 5673 times:

I have seen certain Fokker aircraft also with white anti-collision beacons and wondered the same thing?
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User currently offlinehotplane From UK - England, joined Jul 2006, 1037 posts, RR: 0
Reply 5, posted (4 years 6 days 18 hours ago) and read 5658 times:

Just realiszed something - I have only ever noticed the belly and tail light, not the roof one. Even stranger that they have two whites and one red!


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User currently offlineYYZatcboy From Canada, joined Apr 2005, 1068 posts, RR: 0
Reply 6, posted (4 years 6 days 12 hours ago) and read 5550 times:
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The one on the roof is the beacon, the ones on the tail and the belly are strobes. There are no strobes on the wings.


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User currently offlinestratosphere From United States of America, joined Sep 2007, 1651 posts, RR: 4
Reply 7, posted (4 years 6 days 6 hours ago) and read 5479 times:

Don't know about the Q but in the Saab 340 the strobes have 2 positions one is red and after t/o they go to high intensity and they turn white


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User currently offlineT prop From United States of America, joined Apr 2001, 1023 posts, RR: 1
Reply 8, posted (4 years 6 days 6 hours ago) and read 5470 times:

The white anti collision lights are strobes, they're normally used when the aircraft is in flight or on a runway. The red beacon is a recognition light, they use this when taxiing around, no need to blind everyone with the strobes. There is one toggle switch that controls these lights, it has 3 positions: Red, off and white anti collision, it is not possible to have the anti collision and the red recognition light on at the same time.

User currently offlinewestern727 From United States of America, joined Jan 2007, 743 posts, RR: 4
Reply 9, posted (4 years 4 days 22 hours ago) and read 5340 times:

Quoting T prop (Reply 8):
it is not possible to have the anti collision and the red recognition light on at the same time.

Fascinating; thank you. Now, as others have wondered: why white to begin with? Why not "exclusively red" like everybody else? Even the 787 uses red.



Jack @ AUS
User currently offline413X3 From United States of America, joined Jul 2008, 1983 posts, RR: 0
Reply 10, posted (4 years 4 days 21 hours ago) and read 5331 times:

Strange I could have sworn, in the US, it was a FAR that airplanes built after a certain year were required to have red anti-collision lights on at all times

User currently offlineShamrock137 From United States of America, joined Jul 2005, 141 posts, RR: 0
Reply 11, posted (4 years 4 days 21 hours ago) and read 5310 times:

Quoting 413X3 (Reply 10):
Strange I could have sworn, in the US, it was a FAR that airplanes built after a certain year were required to have red anti-collision lights on at all times

I don't believe it specifies what color the lights must be. I know many new GA aircraft have ditched the red beacon in the tail altogether and just have the two white strobes on the wingtips. I'm personally not a big fan of this design as at night it can be very bright when they taxi on the ramp.



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User currently offlineAirframeAS From United States of America, joined Feb 2004, 14150 posts, RR: 24
Reply 12, posted (4 years 4 days 14 hours ago) and read 5262 times:

Quoting hotplane (Thread starter):
Why are the anti-collision lights on the top and bottom of the DHC8-Q400 fuselage/tail white and not red like all other civil airliners?

The anti-collision light on all the Q's are one red "glow" light. They do actually have the red anti-collision light on top of the fuselage.

However, the Q100-300 have the strobe lights on the wing tips traditionally. The Q400's do not and were moved elsewhere on the airplane, above the tail and the undercarriage. Why they changed things on the Q400's is beyond me.

I have never seen a Q that had the red anti-collision "glow" light on and the strobe lights on at the same time ever.

I wonder why Bombardier decided to use the "glow" method for the red anti-collision light instead of the strobe flashing method.



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