FlyASAGuy2005
Topic Author
Posts: 3965
Joined: Sun Sep 23, 2007 4:55 am

Rotating Beacons - Different Configs?

Thu Dec 02, 2010 2:02 am

Hello TechOps experts. One thing i've always noticed and wanted to ask was, is there a specific reason why different a/c's rotating beacons emit differently? For example, on the CRJs, the blink independently (top/bottom/top...) and on say the 757 the both blink at the same time. On the 717, it's both (top/bottom/top then both at the same time).

Is there a rhyme or reason behind this? My initial thoughts is no and it's just they way they are wired but really want to know the reasoning behind it.
What gets measured gets done.
 
shamrock137
Posts: 238
Joined: Mon Jul 25, 2005 7:10 am

RE: Rotating Beacons - Different Configs?

Thu Dec 02, 2010 4:45 pm

Their is no standardized pattern or regulation relating to the flash patterns, it simply depends on what type of flasher module is used. Boeings seem to synchronize the beacons so that the top and bottom flash at the same time. Airbus does the same thing, yet it is further synchronized with the flash sequence of the wingtip strobes. Hope that helps!
Time to spare? Go by air!
 
citationjet
Posts: 2259
Joined: Sun Mar 09, 2003 2:26 am

RE: Rotating Beacons - Different Configs?

Thu Dec 02, 2010 7:35 pm

Sometimes the beacons are not always in the same location for a given type of aircraft. The early Citation X's (Model 750s) had the beacon on top of the bullet on the vertical tail. Later serial numbers of the same type had the beacon on the bottom side of the bullet.


View Large View Medium
Click here for bigger photo!

Photo © Shawn Early - Flight Deck Photography
View Large View Medium
Click here for bigger photo!

Photo © Hans Domjan



.
Boeing Flown: 701,702,703;717;720;721,722;731,732,733,734,735,737,738,739;741,742,743,744,747SP;752,753;762,763;772,773.
 
26point2
Posts: 834
Joined: Wed Mar 03, 2010 6:01 am

RE: Rotating Beacons - Different Configs?

Fri Dec 03, 2010 3:53 pm

The Global Express now sports a 3 position beacon switch. Off-Red-White. We use red. Someone said white is required in some countries. Not sure if that's true though.
 
kingairta
Posts: 454
Joined: Mon Feb 09, 2009 2:24 pm

RE: Rotating Beacons - Different Configs?

Fri Dec 03, 2010 6:16 pm

A quick way to tell if a C-130 was built with air to air refuelling in mind and it doesn't have the pods is if the strobe is on the tail or the fuselage. KC's have the strobe on the tip of the vertical stab non KC's have the strobe on the fuselage.

Also on the C-130s with strobes(non rotating) they have seperate power supplies.

I think and maybe wrong but I believe when it comes to the beacons it's upto the manufacturer to do as they please as they meet the minimum requirements.

As SOP in my C-130 days we ran the white strobes as much as possible. The only time we'd switch to red was if we were in the goo and the flash was irritating.
 
stratosphere
Posts: 1087
Joined: Sat Sep 22, 2007 12:45 pm

RE: Rotating Beacons - Different Configs?

Fri Dec 10, 2010 5:17 am

Quoting 26point2 (Reply 3):
The Global Express now sports a 3 position beacon switch. Off-Red-White. We use red. Someone said white is required in some countries. Not sure if that's true though.

For the short time I worked at the regionals the SAAB 340 has a 3 postiton switch as well. They use the red for taxi and switch to white for takeoff and in flight.
 
access-air
Posts: 1576
Joined: Thu Sep 21, 2000 5:30 pm

RE: Rotating Beacons - Different Configs?

Sat Dec 11, 2010 4:48 pm

Quoting stratosphere (Reply 5):
For the short time I worked at the regionals the SAAB 340 has a 3 postiton switch as well. They use the red for taxi and switch to white for takeoff and in flight.

The BAE ATP does this too....

Actually on newer planes, these anti-collision lights dont rotate, they are strobes...
On older planes like the DC8s, DC9s, 707s early 727s and 737s, etc...all used rotating or agitating beacons. Boeing perferred rotating and Douglas the agitating back and fourth movement.
Actually a lot of older aircraft had the these beacons until the strobe types came along. I guess the simplicty of a strobe versus an actual motorized moving light fixture was an ease maintenance wise...
I prefer the only school stuff....I hate the red strobes with a passion.....
United used to on their older DC8s, 737-200s and 727-100s and early 200s, not only the rotating beacons but also the red and green nav lights would agitate back and fourth too!!! The little tail cone up on the 727s T-tail did this with the white light as well!!! I loved seeing that!!!!!!!!!!!!!!
The rotating or agitating beacons, to me, seem to get my attention more than the strobe lights....

Access-Air
Remember, Wherever you go, there you are!!!!
 
bohica
Posts: 2319
Joined: Tue Feb 10, 2004 3:21 pm

RE: Rotating Beacons - Different Configs?

Sat Dec 11, 2010 8:36 pm

Quoting CitationJet (Reply 2):
The early Citation X's (Model 750s) had the beacon on top of the bullet on the vertical tail. Later serial numbers of the same type had the beacon on the bottom side of the bullet.

I'm curious to know why the rotating beacon (strobe) would be on the bottom of the bullet? That would block the view of the beacon if you were looking at the plane head-on.

Quoting Access-Air (Reply 6):
United used to on their older DC8s, 737-200s and 727-100s and early 200s, not only the rotating beacons but also the red and green nav lights would agitate back and fourth too!!! The little tail cone up on the 727s T-tail did this with the white light as well!!! I loved seeing that!!!!!!!!!!!!!!

Those were the good ole days.   The only problem with that was there were too many moving parts. A retired UA mechanic told me that they were being fixed all the time.


The L-1011 had four rotating beacons. Two on the top and two on the bottom. If one of them was burned out on the top or bottom, it could be MEL'd. Some of the later L-1011's had strobes though.
 
c5load
Posts: 344
Joined: Tue Sep 16, 2008 9:40 pm

RE: Rotating Beacons - Different Configs?

Sat Dec 11, 2010 8:43 pm

Strobes on military aircraft differ as well. On the C-5 we don't have wingtip strobes, so we have white flashing lights on the top and bottom of the fuselage, and on the tail. They can be changed to red as well. The KC-10 is cool the way they have theirs. From what I have seen, after they takeoff their fusealge strobes have a pattern of red-white-red, in addition to normal double flashing wing strobes.

Quoting Access-Air (Reply 6):
United used to on their older DC8s, 737-200s and 727-100s and early 200s, not only the rotating beacons but also the red and green nav lights would agitate back and fourth too!!! The little tail cone up on the 727s T-tail did this with the white light as well!!! I loved seeing that!!!!!!!!!!!!!!
The rotating or agitating beacons, to me, seem to get my attention more than the strobe lights....

     
"But this airplane has 4 engines, it's an entirely different kind of flying! Altogether"
 
DashTrash
Posts: 1266
Joined: Mon Aug 21, 2006 8:44 am

RE: Rotating Beacons - Different Configs?

Sat Dec 11, 2010 9:05 pm

Quoting bohica (Reply 7):
I'm curious to know why the rotating beacon (strobe) would be on the bottom of the bullet? That would block the view of the beacon if you were looking at the plane head-on.

There is some sort of security device option available on later serial #s that uses the top of the vertical stab. The red light is blocked from the front, but most threats would be coming from the side. Also, if you're a couple of degrees off center in either direction you'll still see it blinking.

Who is online

Users browsing this forum: Google Adsense [Bot] and 20 guests

Popular Searches On Airliners.net

Top Photos of Last:   24 Hours  •  48 Hours  •  7 Days  •  30 Days  •  180 Days  •  365 Days  •  All Time

Military Aircraft Every type from fighters to helicopters from air forces around the globe

Classic Airliners Props and jets from the good old days

Flight Decks Views from inside the cockpit

Aircraft Cabins Passenger cabin shots showing seat arrangements as well as cargo aircraft interior

Cargo Aircraft Pictures of great freighter aircraft

Government Aircraft Aircraft flying government officials

Helicopters Our large helicopter section. Both military and civil versions

Blimps / Airships Everything from the Goodyear blimp to the Zeppelin

Night Photos Beautiful shots taken while the sun is below the horizon

Accidents Accident, incident and crash related photos

Air to Air Photos taken by airborne photographers of airborne aircraft

Special Paint Schemes Aircraft painted in beautiful and original liveries

Airport Overviews Airport overviews from the air or ground

Tails and Winglets Tail and Winglet closeups with beautiful airline logos