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Backfire Crash

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Old 27th Jan 2019, 20:36
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Don't forget lack of RA reliability on snow...
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Old 27th Jan 2019, 21:37
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Said to have been some NDB approach.
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Old 28th Jan 2019, 00:00
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I wouldn't expect a complete failure of the fuselage. Damage, yes, but compete failure, no..
. It does happen.

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Old 28th Jan 2019, 07:41
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The MD-80 breakup was not a normal approach and happened during a overly risky development profile flown by test pilots. Most of reasons for that crash happened well-before anyone got onboard.
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Old 28th Jan 2019, 09:04
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Technicalities of the crash aside, I'm amazed there was someone actually filming the landing in those conditions. I'm even more amazed they stuck with it after the initial impact - Gawd only knows where the debris was headed after the initial break-up. I for one would have dived for cover.
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Old 28th Jan 2019, 09:42
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Originally Posted by dead_pan
Technicalities of the crash aside, I'm amazed there was someone actually filming the landing in those conditions. I'm even more amazed they stuck with it after the initial impact - Gawd only knows where the debris was headed after the initial break-up. I for one would have dived for cover.
so you didn't read post #6 then...
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Old 28th Jan 2019, 10:05
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LWithout the benefit of frame by frame viewing it looks as if the fire was fully developed at the moment of the nose breaking away

Is it possible the landing was an emergency one though the lack of fire trucks suggests otherwise?
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Old 28th Jan 2019, 10:36
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so you didn't read post #6 then...
Answers my first point, but not my second. Is the cameraman under strict instruction to carry on filming, come what may?
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Old 28th Jan 2019, 11:52
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Originally Posted by Pontius Navigator
LWithout the benefit of frame by frame viewing it looks as if the fire was fully developed at the moment of the nose breaking away

Is it possible the landing was an emergency one though the lack of fire trucks suggests otherwise?
MLG punched up through the wing into fuel tanks in cnsequence if the firm arrival?

Haven’t looked at placement, but presumably a lot of ‘fuel based equipment’ in that area?
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Old 28th Jan 2019, 12:38
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Originally Posted by Pontius Navigator
LWithout the benefit of frame by frame viewing it looks as if the fire was fully developed at the moment of the nose breaking away

Is it possible the landing was an emergency one though the lack of fire trucks suggests otherwise?
No, tail seems to hit the snow, then the fuselage breaks in half, then the first appearance of fire is at the apex of the two broken sections as the rear pitches up and the front pitches down
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Old 28th Jan 2019, 12:49
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Some russian report claims the tower had ordered some diversion due to bad weather below minimum but the regiment's commander insisted they had to land right there.

https://www.murmansk.kp.ru/daily/26933/3983422/
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Old 28th Jan 2019, 13:51
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Originally Posted by Pontius Navigator
Without the benefit of frame by frame viewing
Youtube allows 0.25 speed (and others). Gear Icon/Speed.

At that speed the nose can be seen to fall off before the fire is visible.

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Old 28th Jan 2019, 15:55
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Does anyone know if those birds are equipped with FDR?
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Old 28th Jan 2019, 16:11
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Originally Posted by jimjim1
Youtube allows 0.25 speed (and others). Gear Icon/Speed.

At that speed the nose can be seen to fall off before the fire is visible.
Yes, the fuselage fractures due to the impact on to the runway. That was the reaction to the impact. The fuselage acts like a simply supported beam subject to a distributed load (in this case the fuselage weight x NZ (G) load factor). The simple support is at the interface of ground and tyre. The force finds the weakest point and if the force is high enough, structural failure ranging from material plasticity and bolt failure up to catastrophic rupture, as seen here, occurs.

Often, the weakest point is the MLG joints and the landing gear collapses or punches through the wing, and the fuselage hits the ground more or less in one go, as with the 777 at Heathrow.
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Old 28th Jan 2019, 16:51
  #35 (permalink)  
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Originally Posted by jimjim1
Youtube allows 0.25 speed (and others). Gear Icon/Speed.

At that speed the nose can be seen to fall off before the fire is visible.
My system does not allow speed change but on YT is was clear that the breakup came first.

Last edited by Pontius Navigator; 28th Jan 2019 at 17:58.
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