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Author Topic: Preliminary Findings Air Asia Jet  (Read 5826 times)

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Rods2

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Preliminary Findings Air Asia Jet
« on: 20 January 2015, 18:49:05 »

The findings are that it climbed too fast at 6000ft / min to avoid a storm and then stalled.

http://www.bbc.co.uk/news/world-asia-30902237

Spokesman saying a fighter jet can't climb at that rate is bull, where many modern fighters can climb at over 50,000ft / min!
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Field Marshal Dr. Opti

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Re: Preliminary Findings Air Asia Jet
« Reply #1 on: 20 January 2015, 19:03:07 »

Surely there would be some form of anti-stall device, along with an audible warning.
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Shackeng

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Re: Preliminary Findings Air Asia Jet
« Reply #2 on: 20 January 2015, 19:05:05 »

Surely there would be some form of anti-stall device, along with an audible warning.

There are both of these, so let us wait for the proper report. :y

http://www.pprune.org/rumours-news/553569-air-asia-indonesia-lost-contact-surabaya-singapore-113.html
« Last Edit: 20 January 2015, 19:08:02 by Shackeng »
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zirk

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Re: Preliminary Findings Air Asia Jet
« Reply #3 on: 20 January 2015, 19:10:30 »

Ive always been told its quite difficult to stall modern Commercial Airliners, ie the Pilots got to be trying really hard to drop a wing in a stall.  :-\
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Shackeng

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Re: Preliminary Findings Air Asia Jet
« Reply #4 on: 20 January 2015, 19:13:45 »

Ive always been told its quite difficult to stall modern Commercial Airliners, ie the Pilots got to be trying really hard to drop a wing in a stall.  :-\

Not that difficult if you are trying. ::)
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Entwood

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Re: Preliminary Findings Air Asia Jet
« Reply #5 on: 20 January 2015, 19:52:15 »

Given the weather at the time of the incident it is quite conceivable that a very strong updraft "might" have caused the rate of ascent seen on the radar. This would not cause a "stall" in the normal use of the word as the rapid rate of climb would be counteracted by a "nose down" condition, either manually by the pilots or automatically by the flight management system (autopilot) which, given the relative air flow would decrease the chances of a stall. There is a danger that this action leads to a very rapid rate of descent once the aircraft leaves the updraft, however from the height they were at that should have been easily recoverable.

As said .. lets wait until the accident data recorders are analysed properly and we know some facts, rather than suppositions.
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Lizzie_Zoom

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Re: Preliminary Findings Air Asia Jet
« Reply #6 on: 21 January 2015, 16:36:42 »

I have taken to watching the Air Investigation programmes Nat Geo (Channel 423) and this has happened before.  The pivots ice up, the pilots lose their instrumentation / become confused and disorientated. losing track of their true air speed,and one pilot continues to pull the stick back instead of pushing forward and getting out of the stall.

They ignore all normal reasoning, now apparently being so used to relying on instruments to fly instead of actully "flying" the plane and lose it.  At least two cases (one the Air France Airbus for one that ended in the southern Atlantic)  I have seen involved all this and the plane just ended up free falling many thousands of feet in minutes and going in flat! :o :o :o

Rather than climbing at a extraordinary rate, this one I suggest MAY have fallen at an extraordinary rate and ripped off it's tail plane plus braking up in the air.

Obviously though the fall investigation should reveal the real truth.
« Last Edit: 21 January 2015, 16:38:38 by Lizzie Zoom »
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05omegav6

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Re: Preliminary Findings Air Asia Jet
« Reply #7 on: 21 January 2015, 17:09:06 »

Pitot tubes... And in the case of AF443? Pilot error caused that ultimately...  It took them nearly 38k feet to not save the aircraft as they panicked and ended up with the pilot and copilot trying to fly the aircraft in opposite directions, and by the time the captain had figured it out they were about five seconds from dead :'(
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steve6367

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Re: Preliminary Findings Air Asia Jet
« Reply #8 on: 21 January 2015, 17:19:46 »

The findings are that it climbed too fast at 6000ft / min to avoid a storm and then stalled.

http://www.bbc.co.uk/news/world-asia-30902237

Spokesman saying a fighter jet can't climb at that rate is bull, where many modern fighters can climb at over 50,000ft / min!

The EL Lightening could manage 20,000 / min in the late 50's
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Gaffers

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Re: Preliminary Findings Air Asia Jet
« Reply #9 on: 21 January 2015, 17:24:39 »

The findings are that it climbed too fast at 6000ft / min to avoid a storm and then stalled.

http://www.bbc.co.uk/news/world-asia-30902237

Spokesman saying a fighter jet can't climb at that rate is bull, where many modern fighters can climb at over 50,000ft / min!

The EL Lightening could manage 20,000 / min in the late 50's

When properly prepared it could go vertical and then supersonic.....although the prep for such a stunt would degrade the exoskeleton airframe which thus limited it's service life and was it's eventual demise.  A shame really it was a superb rocket with a seat strapped to it aircraft.
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LC0112G

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Re: Preliminary Findings Air Asia Jet
« Reply #10 on: 21 January 2015, 18:31:01 »

The findings are that it climbed too fast at 6000ft / min to avoid a storm and then stalled.

http://www.bbc.co.uk/news/world-asia-30902237

Spokesman saying a fighter jet can't climb at that rate is bull, where many modern fighters can climb at over 50,000ft / min!

50000 ft/min is the initial climb rate of a typical modern fighter, at sea level. They can't maintain anything like that rate as the altitude increases and the air gets thinner. "Streak Eagle" reached 98000 feet in 3 minutes 28 seconds - the last 30K odd feet being ballistic as the engines had flamed out approaching 70K. Initial climb rate was 70K ft/min after about 30 seconds at sea level accelerating to Mach 1.4.

http://www.whiteeagleaerospace.com/aquila-maxima/

The Air Asia jet started out at 36000 feet and appears to have climbed to in excess of 38000 ft in around 20 seconds. Those figures are comparible with a sub sonic jet fighter's capabilities at those flight levels. Service ceiling on an A320 is FL390 so something extraordinary must have happened. 2000 feet in 20 seconds is nose up, and hang on till the air thins and the airspeed decays, at which point it stalls (which it will). Subsequent data apparently shows the plane falling at 15K ft/min, though it hasn't been revealed if it was in one piece whilst this was happening.
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05omegav6

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Re: Preliminary Findings Air Asia Jet
« Reply #11 on: 21 January 2015, 18:57:03 »

Possibly not for long depending on attitude during the descent  :-\
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Lizzie_Zoom

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Re: Preliminary Findings Air Asia Jet
« Reply #12 on: 21 January 2015, 19:42:33 »

The findings are that it climbed too fast at 6000ft / min to avoid a storm and then stalled.

http://www.bbc.co.uk/news/world-asia-30902237

Spokesman saying a fighter jet can't climb at that rate is bull, where many modern fighters can climb at over 50,000ft / min!

The EL Lightening could manage 20,000 / min in the late 50's

When properly prepared it could go vertical and then supersonic.....although the prep for such a stunt would degrade the exoskeleton airframe which thus limited it's service life and was it's eventual demise.  A shame really it was a superb rocket with a seat strapped to it aircraft.


All I know is that back in the 1980s I was at a Fairford Air Show and (I think it was) an USAF F14 came flying along the runway at very low level, then tipped up vertically like a rocket and raced up into a very blue sky until he disappeared at about 30,000 ft; very, very impressive! :y :y
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EMD

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Re: Preliminary Findings Air Asia Jet
« Reply #13 on: 21 January 2015, 20:31:39 »

Like this Lizzie  :y

Take Off
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05omegav6

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Re: Preliminary Findings Air Asia Jet
« Reply #14 on: 22 January 2015, 00:57:46 »

Nah, that's not a take off...

That's a take off... 8)
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