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What Is Trailing From The Tail?  
User currently offlineAndz From South Africa, joined Feb 2004, 8467 posts, RR: 10
Posted (9 years 7 months 3 weeks 1 day 6 hours ago) and read 4559 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, 21865 posts, RR: 55
Reply 1, posted (9 years 7 months 3 weeks 1 day 6 hours ago) and read 4546 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 7 months 3 weeks 1 day 6 hours ago) and read 4534 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 7 months 3 weeks 1 day 6 hours ago) and read 4503 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 7 months 3 weeks 1 day 5 hours ago) and read 4436 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 7 months 3 weeks 1 day 4 hours ago) and read 4354 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 onlineDoona From Sweden, joined Feb 2005, 3772 posts, RR: 13
Reply 6, posted (9 years 7 months 3 weeks 1 day 4 hours ago) and read 4349 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, 31712 posts, RR: 56
Reply 7, posted (9 years 7 months 3 weeks 1 day 3 hours ago) and read 4303 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 7 months 3 weeks 20 hours ago) and read 4146 times:
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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 7 months 3 weeks 20 hours ago) and read 4127 times:

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

Rgds.


User currently onlineDoona From Sweden, joined Feb 2005, 3772 posts, RR: 13
Reply 10, posted (9 years 7 months 3 weeks 19 hours ago) and read 4082 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 7 months 3 weeks 19 hours ago) and read 4055 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, 940 posts, RR: 2
Reply 12, posted (9 years 7 months 3 weeks 19 hours ago) and read 4037 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 7 months 3 weeks 17 hours ago) and read 3893 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 7 months 3 weeks 16 hours ago) and read 3809 times:
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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, 8467 posts, RR: 10
Reply 15, posted (9 years 7 months 3 weeks 16 hours ago) and read 3765 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 7 months 3 weeks 15 hours ago) and read 3727 times:

i think it's a price tag.

User currently offlineCitationJet From United States of America, joined Mar 2003, 2469 posts, RR: 3
Reply 17, posted (9 years 7 months 3 weeks 15 hours ago) and read 3714 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 7 months 3 weeks 15 hours ago) and read 3698 times:

I think it is a price tag too! LOL.

User currently offlineOldAeroGuy From United States of America, joined Dec 2004, 3598 posts, RR: 66
Reply 19, posted (9 years 7 months 3 weeks 11 hours ago) and read 3574 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 7 months 3 weeks 6 hours ago) and read 3289 times:

tow drone for aircraft gunners

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