5 ms·

After touchdown, but it rolled sideways not end over end. This kept the fuselage intact and ripped off the wings (where all the fuel is) which is why everyone

After touchdown, but it rolled sideways not end over end. This kept the fuselage intact and ripped off the wings (where all the fuel is) which is why everyone survived.

eastbound 2y ago
Just to understand: Did it roll upside down, with people’s head at the bottom, or sideways, with people’s back to the front of the direction?
- cm2187 2y ago
  It certainly ended up upside down.
- sangnoir 2y ago
  What you describe in the second sentence - rotating around the vertical-axis - is typically termed a spin . I think parent was saying the roll was along the planes' length rather than tail-over-nose, the latter usually result in the aircraft breaking up as the torque will be really high.
  - FabHK 2y ago
    Rotation around the - longitudinal axis: roll, controlled by ailerons. - vertical axis: yaw, controlled by rudder. - lateral axis (through the wings): pitch, controlled by elevators.
    - sangnoir 2y ago
      Thanks - those are correct terms for aircraft in flight, that don't apply to out-of-control vehicles on the ground. An airplane that loses traction and rotates about it's vertical axis is spinning, not yawing.
- account42 2y ago
  In case you (or others confused) haven't seen it year, this video clearly shows the sideways roll: https://www.reddit.com/r/CatastrophicFailure/comments/1isabtg/a_clear_visual_of_delta_airlines_crashlanding_at/ https://www.reddit.com/r/CatastrophicFailure/comments/1isabt...
InDubioProRubio 2y ago
Maybe that would be a general great idea.. slide the people capsule away from the bomb in the final moments of a crash landing. But that would make it necessary to have the people capsule bolted on - with explosive destructible bolts and i think air-companies are not mentally ready yet for the crumble zone airplane.
- rob74 2y ago
  Many airplanes (not sure about the CRJ) also have a center wing tank, which is directly under the fuselage, so would be kinda hard to separate cleanly. Also, explosive bolts might start a fire that wouldn't have started without the bolts...
  - InDubioProRubio 2y ago
    And they purge the fuel, if its a controlled emergency landing.. but in a uncontrolled emergency.. to let go of the wings seems a good option for events to go.
    - buildsjets 2y ago
      No, they don't. The CRJ, and in fact most smaller airliners including the A320 and 737 do not have the ability to dump fuel. In larger aircraft that do have the ability to dump fuel, the reason is to make the airplane lighter so it does not have do an overweight landing and the subsequent high-cost overweight landing inspection. It is not done to reduce the probability of a post-crash fire.
      - account42 2y ago
        Dumping fuel is only one option. Burning it up is another, but obviously is going to be an option for ever fewer emergencies.

After touchdown, but it rolled sideways not end over end. This kept the fuselage intact and ripped off the wings (where all the fuel is) which is why everyone survived.

eastbound 2y ago

Just to understand: Did it roll upside down, with people’s head at the bottom, or sideways, with people’s back to the front of the direction?

cm2187 2y ago
It certainly ended up upside down.
sangnoir 2y ago
What you describe in the second sentence - rotating around the vertical-axis - is typically termed a spin . I think parent was saying the roll was along the planes' length rather than tail-over-nose, the latter usually result in the aircraft breaking up as the torque will be really high.
- FabHK 2y ago
  Rotation around the - longitudinal axis: roll, controlled by ailerons. - vertical axis: yaw, controlled by rudder. - lateral axis (through the wings): pitch, controlled by elevators.
  - sangnoir 2y ago
    Thanks - those are correct terms for aircraft in flight, that don't apply to out-of-control vehicles on the ground. An airplane that loses traction and rotates about it's vertical axis is spinning, not yawing.
account42 2y ago
In case you (or others confused) haven't seen it year, this video clearly shows the sideways roll: https://www.reddit.com/r/CatastrophicFailure/comments/1isabtg/a_clear_visual_of_delta_airlines_crashlanding_at/ https://www.reddit.com/r/CatastrophicFailure/comments/1isabt...

InDubioProRubio 2y ago

Maybe that would be a general great idea.. slide the people capsule away from the bomb in the final moments of a crash landing. But that would make it necessary to have the people capsule bolted on - with explosive destructible bolts and i think air-companies are not mentally ready yet for the crumble zone airplane.

rob74 2y ago
Many airplanes (not sure about the CRJ) also have a center wing tank, which is directly under the fuselage, so would be kinda hard to separate cleanly. Also, explosive bolts might start a fire that wouldn't have started without the bolts...
- InDubioProRubio 2y ago
  And they purge the fuel, if its a controlled emergency landing.. but in a uncontrolled emergency.. to let go of the wings seems a good option for events to go.
  - buildsjets 2y ago
    No, they don't. The CRJ, and in fact most smaller airliners including the A320 and 737 do not have the ability to dump fuel. In larger aircraft that do have the ability to dump fuel, the reason is to make the airplane lighter so it does not have do an overweight landing and the subsequent high-cost overweight landing inspection. It is not done to reduce the probability of a post-crash fire.
    - account42 2y ago
      Dumping fuel is only one option. Burning it up is another, but obviously is going to be an option for ever fewer emergencies.