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What Is Trailing From The Tail?  
User currently offlineAndz From South Africa, joined Feb 2004, 8494 posts, RR: 10
Posted (9 years 10 months 4 weeks 1 day 19 hours ago) and read 4720 times:
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Check this pic of the 380 taking off for its second flight, what is that thing attached to the top of the tail?


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Photo © French Frogs AirSlides




After Monday and Tuesday even the calendar says WTF...
20 replies: All unread, jump to last
 
User currently offlineMir From United States of America, joined Jan 2004, 22100 posts, RR: 55
Reply 1, posted (9 years 10 months 4 weeks 1 day 18 hours ago) and read 4707 times:

Probably some kind of air data sensor, but I'm not sure of it's function exactly.

-Mir



7 billion, one nation, imagination...it's a beautiful day
User currently offlineKerberos From Canada, joined Apr 2004, 119 posts, RR: 0
Reply 2, posted (9 years 10 months 4 weeks 1 day 18 hours ago) and read 4695 times:

Looks like someone forgot the dog was tied to the bumper...

Sorry... National Lampoon moment.



This is your captain speaking. I’ve turned off the no-smokin’ sign. Hell, if the plane is smokin' why can't you?
User currently offlineDLKAPA From , joined Dec 1969, posts, RR:
Reply 3, posted (9 years 10 months 4 weeks 1 day 18 hours ago) and read 4664 times:

Quoting Mir (Reply 1):
Probably some kind of air data sensor, but I'm not sure of it's function exactly.

Actually it measures the wake turbulence behind the tail of the aircraft.


User currently offlineScotron11 From United Kingdom, joined Feb 2004, 1178 posts, RR: 3
Reply 4, posted (9 years 10 months 4 weeks 1 day 17 hours ago) and read 4597 times:

Quoting DLKAPA (Reply 3):

Actually it measures the wake turbulence behind the tail of the aircraft

Yeah, I read an article how some folk are protesting the expansion of the Airbus facility in Hamburg because they're scared the wake turbulence caused by the A380 will demolish a church which is nearby. Also of blowing tiles off the roofs of houses.

Gee, if it ain't one thing, it's the other!


User currently offlineAirbusA346 From United Kingdom, joined Dec 2004, 7437 posts, RR: 2
Reply 5, posted (9 years 10 months 4 weeks 1 day 16 hours ago) and read 4515 times:

Heres one on the A318


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Photo © Gerd Beilfuss



Tom.



Tom Walker '086' First Officer of a A318/A319 for Air Lambert - Hours Flown: 17 hour 05 minutes (last updated 24/12/05).
User currently offlineDoona From Sweden, joined Feb 2005, 3778 posts, RR: 13
Reply 6, posted (9 years 10 months 4 weeks 1 day 16 hours ago) and read 4510 times:

I remember seeing one on the tail of an A319 at Farnborough a bunch of years ago... never knew what it was though...


Sure, we're concerned for our lives. Just not as concerned as saving 9 bucks on a roundtrip to Ft. Myers.
User currently offlineHAWK21M From India, joined Jan 2001, 31716 posts, RR: 55
Reply 7, posted (9 years 10 months 4 weeks 1 day 15 hours ago) and read 4464 times:

Quoting DLKAPA (Reply 3):
Quoting Mir (Reply 1):
Probably some kind of air data sensor, but I'm not sure of it's function exactly.


Actually it measures the wake turbulence behind the tail of the aircraft.

Certainly looks like an Airflow sensor.
regds
MEL



Think of the brighter side!
User currently offlineAeroWeanie From United States of America, joined Dec 2004, 1610 posts, RR: 52
Reply 8, posted (9 years 10 months 4 weeks 1 day 8 hours ago) and read 4307 times:

Quoting Scotron11 (Reply 4):
Actually it measures the wake turbulence behind the tail of the aircraft

Guess again. Its a trailing cone, which provides an accurate static pressure for reducing the flight test data.


User currently offlineJamie757 From , joined Dec 1969, posts, RR:
Reply 9, posted (9 years 10 months 4 weeks 1 day 8 hours ago) and read 4288 times:

It's actually an optional bracket that can be used for towing banners. Developed in conjunction with Ryanair.  Wink

Rgds.


User currently offlineDoona From Sweden, joined Feb 2005, 3778 posts, RR: 13
Reply 10, posted (9 years 10 months 4 weeks 1 day 8 hours ago) and read 4243 times:

Jamie757: Good one...  bigthumbsup 


Sure, we're concerned for our lives. Just not as concerned as saving 9 bucks on a roundtrip to Ft. Myers.
User currently offlineVzlet From United States of America, joined Mar 2004, 839 posts, RR: 0
Reply 11, posted (9 years 10 months 4 weeks 1 day 8 hours ago) and read 4216 times:

A trailing cone on an A310:
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Photo © Mark Carlisle


And, here's a datasheet from a company that makes specialized air data measuring systems:
http://www.prodynamics.com/pdf/100100_de.pdf

(Some good technical links in the datasheet.)

[Edited 2005-05-05 19:37:17]


"That's so stupid! If they're so secret, why are they out where everyone can see them?" - my kid
User currently offlineCURLYHEADBOY From Italy, joined Feb 2005, 948 posts, RR: 2
Reply 12, posted (9 years 10 months 4 weeks 1 day 8 hours ago) and read 4198 times:

Does this mean that the boom protruding from the A380 tail will go away when flight testing is complete? Hope so, since it's a small feature i don't like too much...


If God had wanted men to fly he would have given them more money...
User currently offlineJamesbuk From United Kingdom, joined May 2005, 3968 posts, RR: 4
Reply 13, posted (9 years 10 months 4 weeks 1 day 5 hours ago) and read 4054 times:

maybe its if the a380 runs out of fuel theyll refuel it with the boom  sarcastic  lol by the way i was joking does it have to be a certain distance back from the tail


You cant have your cake and eat it... What the hells the point in having it then!!!
User currently offlineAeroWeanie From United States of America, joined Dec 2004, 1610 posts, RR: 52
Reply 14, posted (9 years 10 months 4 weeks 1 day 4 hours ago) and read 3970 times:

Its not really a boom - its a piece of tubing with a cone on the end. On the ground, they hang downwards. It will be removed after flight testing is complete.

User currently offlineAndz From South Africa, joined Feb 2004, 8494 posts, RR: 10
Reply 15, posted (9 years 10 months 4 weeks 1 day 4 hours ago) and read 3926 times:
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I wonder why it wasn't there for the first flight....

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Photo © Sam Chui




After Monday and Tuesday even the calendar says WTF...
User currently offlineKhushdesi From United States of America, joined Jan 2004, 85 posts, RR: 0
Reply 16, posted (9 years 10 months 4 weeks 1 day 4 hours ago) and read 3888 times:

i think it's a price tag.

User currently offlineCitationJet From United States of America, joined Mar 2003, 2531 posts, RR: 3
Reply 17, posted (9 years 10 months 4 weeks 1 day 4 hours ago) and read 3875 times:

Quoting AeroWeanie (Reply 8):
Guess again. Its a trailing cone, which provides an accurate static pressure for reducing the flight test data.

AeroWeanie has the correct answer above...

Quoting Andz (Reply 15):
I wonder why it wasn't there for the first flight....

They weren't taking flight test data on the first flight that would require accurate static pressures. Also, the chase plane would provide a cross check of airspeed data.
At Cessna, we never use a trailing cones on prototype first flights.

[Edited 2005-05-05 23:00:06]


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.
User currently offlinePetazulu From United States of America, joined Jan 2003, 701 posts, RR: 1
Reply 18, posted (9 years 10 months 4 weeks 1 day 4 hours ago) and read 3859 times:

I think it is a price tag too! LOL.

User currently offlineOldAeroGuy From United States of America, joined Dec 2004, 3658 posts, RR: 66
Reply 19, posted (9 years 10 months 4 weeks 1 day ago) and read 3735 times:

It's a trailing cone for measuring static pressure remotely from the influence of the airplane. This is necessary to calibrate the airspeed system and the altimeters.

This is more involved than it looks. The cone is to stabilize 150' to 200' of cable and hose that is reeled out when the airplane is on test condition. A length of pipe with flush pressure ports in its sides is spliced into the hose ahead of the cone. Static pressure as detected at the ports is measured by instrumentation within the airplane.

Trailing cones are one of the real pains of flight testing as they frequently break off especially if the airplane is doing stalls or windup turns. When they depart the airplane, you go home because your test day is done.



Airplane design is easy, the difficulty is getting them to fly - Barnes Wallis
User currently offlineB737200300 From United States of America, joined Dec 2003, 38 posts, RR: 0
Reply 20, posted (9 years 10 months 4 weeks 19 hours ago) and read 3450 times:

tow drone for aircraft gunners

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