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Post by julytourist on Jan 8, 2014 13:09:14 GMT 1
What is the device attached by wire to the tail which is clearly shown in the photos above? Anyone know?? Many thanks, JT
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philidor
in service - 6 years
Posts: 8,950
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Post by philidor on Jan 8, 2014 16:55:53 GMT 1
What is the device attached by wire to the tail which is clearly shown in the photos above? Anyone know?? Many thanks, JT This is test instrumentation. I'll try to find some details. EDIT : I just read that this device is used to measure air pressure, but I could not find an authoritative explanation. |
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Linie 9
in service - 1 year
Posts: 2,761
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Post by Linie 9 on Jan 8, 2014 17:16:02 GMT 1
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Post by julytourist on Jan 8, 2014 18:37:44 GMT 1
Thank you both for replying. This is an extract from one on the replies on the link you posted.... 'Most have it right... its a trailing static probe. Its a 100-200 foot long hose. (long enough to get out of the aircraft wake field, it trails above most of the wake) The cone on the end is just to pull it out straight. The actual probe is about 4-6 feet in front of that cone. Its used to calibrate the pitot static probe system on all new aircraft. The static ports on the skin near the nose are affected somewhat by both angle of attack and by yaw angle of the airplane. The probe trailing far enough behind the airplane is unaffected by aircraft attitude. You can compare the airplane static pressure reading to the trailing probe to validate the location of the static probes and provide the air data computers with correction data for use in service. This is part of any new aircraft flight test program'
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philidor
in service - 6 years
Posts: 8,950
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Post by philidor on Jan 8, 2014 19:41:10 GMT 1
This is the thread I was trying to find ! Thank you for the link ! |
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Post by a380fanclub on Jan 8, 2014 22:18:57 GMT 1
Thank you both for replying. This is an extract from one on the replies on the link you posted.... 'Most have it right... its a trailing static probe. Its a 100-200 foot long hose. (long enough to get out of the aircraft wake field, it trails above most of the wake) The cone on the end is just to pull it out straight. The actual probe is about 4-6 feet in front of that cone. Its used to calibrate the pitot static probe system on all new aircraft. The static ports on the skin near the nose are affected somewhat by both angle of attack and by yaw angle of the airplane. The probe trailing far enough behind the airplane is unaffected by aircraft attitude. You can compare the airplane static pressure reading to the trailing probe to validate the location of the static probes and provide the air data computers with correction data for use in service. This is part of any new aircraft flight test program' But the probe is not fitted to every aircraft, is it? |
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Post by FabienA380 on Jan 8, 2014 22:23:56 GMT 1
Interestingly, only on EK frames, and every two years or so... MSN025 in 2009, MSN098 in 2011, and now MSN147 (2013).. Fabien  |
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philidor
in service - 6 years
Posts: 8,950
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Post by philidor on Jan 8, 2014 22:40:12 GMT 1
I suppose that calibration must be performed at some time intervals, and that Airbus uses the same configuration (EK's) for better comparisons. Or they are testing a new type of pitot probes ...
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noistar
Final Assembly Line stage 2
Posts: 388
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Post by noistar on Jan 8, 2014 23:46:48 GMT 1
Interestingly, only on EK frames, and every two years or so... MSN025 in 2009, MSN098 in 2011, and now MSN147 (2013).. Fabien A quick flick through your 'archives'? Wish my collection was as extensive, and more importantly, organised, as yours. Seems the past, rather than the future, is your forte  |
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Post by FabienA380 on Jan 11, 2014 4:10:35 GMT 1
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