DogTailRed2
June 12, 2025, 10:32:00 GMT
permalink Post: 11898936

Quote:

Originally Posted by Tu.114

https://www.youtube.com/watch?v=b3SEjNFJU6M

The video seems to show the aircraft descending from a few 100ft altitude to an impact. The landing gear appears down, flaps are harder to make out.

How does a 787 react to low speed? What are the protections on this type?

Not video, shows a live feed?

Subjects: None

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DogTailRed2
June 12, 2025, 14:57:00 GMT
permalink Post: 11899236

The crash reminds me of the controlled crash into trees at a Paris air show many moons ago. I guess we cannot rule out a computer glitch.

Subjects: None

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DogTailRed2
June 12, 2025, 17:45:00 GMT
permalink Post: 11899458

Quote:

Originally Posted by nike

Symmetric is the key word.

The chances of both engines having simultaneous flame outs due to fuel contamination is almost not possible...too many variables to have them fail at the same time.

What we are seeing is a fairly stable flight path....in that the wings remain level throughout and a point in the flight where the vertical profile changes from a normal take off flight path into the high nose attitude descending one...albeit without any significant or abrupt maneuver.

Strange.

Heathrow 777?

Subjects Fuel (All)

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DogTailRed2
June 12, 2025, 18:23:00 GMT
permalink Post: 11899505

Many years ago when Fly By Wire was first being installed into aircraft they would show these amazing test flights where a pilot would pull back the throttles, raise the nose to try and stall the aircraft and the FBW system would lower the nose, add back in the power and keep the aircraft in controlled flight. That for me (an uneducated layman) was the point in FBW. It was safer than a pilot alone.
How is it then that a modern FBW aircraft can allow itself to be placed into a low, slow and high AOA profile which inevitably leads to a crash and appears to to nothing? I would have expected that the systems would have deployed anything needed, retract anything not needed or at least push the nose down?

Subjects FBW

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DogTailRed2
June 13, 2025, 07:02:00 GMT
permalink Post: 11900030

If you rotated and then lost all power wouldn't you put the nose down?

Subjects: None

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DogTailRed2
July 14, 2025, 16:58:00 GMT
permalink Post: 11922322

Statistics mean nothing if you happen to be on that fatal flight. There are not many modes of transport that result in complete loss of all passengers and crew.

Subjects: None

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DogTailRed2 June 12, 2025, 10:32:00 GMT permalink Post: 11898936	Quote: Originally Posted by Tu.114 https://www.youtube.com/watch?v=b3SEjNFJU6M The video seems to show the aircraft descending from a few 100ft altitude to an impact. The landing gear appears down, flaps are harder to make out. How does a 787 react to low speed? What are the protections on this type? Not video, shows a live feed? Subjects: None The thread is closed so there are no user likes are available and no reply is possible.
DogTailRed2 June 12, 2025, 14:57:00 GMT permalink Post: 11899236	The crash reminds me of the controlled crash into trees at a Paris air show many moons ago. I guess we cannot rule out a computer glitch. Subjects: None The thread is closed so there are no user likes are available and no reply is possible.
DogTailRed2 June 12, 2025, 17:45:00 GMT permalink Post: 11899458	Quote: Originally Posted by nike Symmetric is the key word. The chances of both engines having simultaneous flame outs due to fuel contamination is almost not possible...too many variables to have them fail at the same time. What we are seeing is a fairly stable flight path....in that the wings remain level throughout and a point in the flight where the vertical profile changes from a normal take off flight path into the high nose attitude descending one...albeit without any significant or abrupt maneuver. Strange. Heathrow 777? Subjects Fuel (All) Links are to this post in the relevant subject page so that this post can be seen in context. The thread is closed so there are no user likes are available and no reply is possible.
DogTailRed2 June 12, 2025, 18:23:00 GMT permalink Post: 11899505	Many years ago when Fly By Wire was first being installed into aircraft they would show these amazing test flights where a pilot would pull back the throttles, raise the nose to try and stall the aircraft and the FBW system would lower the nose, add back in the power and keep the aircraft in controlled flight. That for me (an uneducated layman) was the point in FBW. It was safer than a pilot alone. How is it then that a modern FBW aircraft can allow itself to be placed into a low, slow and high AOA profile which inevitably leads to a crash and appears to to nothing? I would have expected that the systems would have deployed anything needed, retract anything not needed or at least push the nose down? Subjects FBW Links are to this post in the relevant subject page so that this post can be seen in context. The thread is closed so there are no user likes are available and no reply is possible.
DogTailRed2 June 13, 2025, 07:02:00 GMT permalink Post: 11900030	If you rotated and then lost all power wouldn't you put the nose down? Subjects: None The thread is closed so there are no user likes are available and no reply is possible.
DogTailRed2 July 14, 2025, 16:58:00 GMT permalink Post: 11922322	Statistics mean nothing if you happen to be on that fatal flight. There are not many modes of transport that result in complete loss of all passengers and crew. Subjects: None No recorded likes for this post (could be before pprune supported 'likes'). Reply to this quoting this original post. You need to be logged in. Not available on closed threads.

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