andz
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What Is Trailing From The Tail?

Thu May 05, 2005 3:13 pm

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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Mir
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RE: What Is Trailing From The Tail?

Thu May 05, 2005 3:19 pm

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

-Mir
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Kerberos
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RE: What Is Trailing From The Tail?

Thu May 05, 2005 3:30 pm

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

Sorry... National Lampoon moment.
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DLKAPA
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RE: What Is Trailing From The Tail?

Thu May 05, 2005 3:39 pm

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.
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scotron11
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RE: What Is Trailing From The Tail?

Thu May 05, 2005 4:25 pm

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!
 
airbusA346
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RE: What Is Trailing From The Tail?

Thu May 05, 2005 5:31 pm

Heres one on the A318


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Tom.
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Doona
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RE: What Is Trailing From The Tail?

Thu May 05, 2005 5:34 pm

I remember seeing one on the tail of an A319 at Farnborough a bunch of years ago... never knew what it was though...
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HAWK21M
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RE: What Is Trailing From The Tail?

Thu May 05, 2005 6:21 pm

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
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aeroweanie
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RE: What Is Trailing From The Tail?

Fri May 06, 2005 1:28 am

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.
 
Jamie757
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RE: What Is Trailing From The Tail?

Fri May 06, 2005 1:34 am

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

Rgds.
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Doona
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RE: What Is Trailing From The Tail?

Fri May 06, 2005 1:49 am

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.
 
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vzlet
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RE: What Is Trailing From The Tail?

Fri May 06, 2005 1:55 am

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]
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curlyheadboy
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RE: What Is Trailing From The Tail?

Fri May 06, 2005 2:01 am

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...
 
jamesbuk
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RE: What Is Trailing From The Tail?

Fri May 06, 2005 4:16 am

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
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aeroweanie
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RE: What Is Trailing From The Tail?

Fri May 06, 2005 5:32 am

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.
 
andz
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RE: What Is Trailing From The Tail?

Fri May 06, 2005 5:46 am

I wonder why it wasn't there for the first flight....

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khushdesi
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RE: What Is Trailing From The Tail?

Fri May 06, 2005 5:57 am

i think it's a price tag.
 
citationjet
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RE: What Is Trailing From The Tail?

Fri May 06, 2005 5:59 am

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]
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petazulu
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RE: What Is Trailing From The Tail?

Fri May 06, 2005 6:03 am

I think it is a price tag too! LOL.
 
OldAeroGuy
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RE: What Is Trailing From The Tail?

Fri May 06, 2005 10:05 am

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.
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B737200300
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RE: What Is Trailing From The Tail?

Fri May 06, 2005 2:59 pm

tow drone for aircraft gunners

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