A220 on the grass
Discussion
“When experiencing a loss of directional control on a wet runway, immediately cancel reverse thrust to idle and adjust the brakes. Full reverse thrust, particularly with asymmetrical deployment or crosswinds, can cause the aircraft to weathercock, slide sideways, or skid due to rudder airflow disruption and asymmetrical side forces.”
Would have probably snapped straight, but you’d have to hope the wheel brakes would have retarded it enough in those surface conditions.
Would have probably snapped straight, but you’d have to hope the wheel brakes would have retarded it enough in those surface conditions.
I have a feeling two things happened. First the "oh fudge" moment when the view went from grey tarmac to green grass which had that startle reaction and second they were going so fast at that point that they were probably going for the ride anyway with the wet surface etc. I expect there was some level of "I cant do that Dave" from the flight computers given the control inputs you can see happening on the wings and the braking action on the wet grass.
Super interesting situation though and would love to see some photos of the fan blades!
Super interesting situation though and would love to see some photos of the fan blades!
Flightradar24 reports the max speed at 131 knots, that has to be around v1 so a very last minute rejection.
The video does appear to show a partial rotate and engine 1 does not appear to be providing thrust. Engine 1 failure?
The is also asymmetry on the secondary flight controls / spoilers.
The video does appear to show a partial rotate and engine 1 does not appear to be providing thrust. Engine 1 failure?
The is also asymmetry on the secondary flight controls / spoilers.
Its all very interesting I think the report will show things happened very quickly, probably even at the same time.
What worries me more is why did it deviate so far so fast. These aircraft are built to deal with engine failure at v1 at MTOW so really it should have remained a bit more stable. If you watch the airbus tests you usually see a big rudder movement but the aircraft stay fairly straight.
What worries me more is why did it deviate so far so fast. These aircraft are built to deal with engine failure at v1 at MTOW so really it should have remained a bit more stable. If you watch the airbus tests you usually see a big rudder movement but the aircraft stay fairly straight.
gotoPzero said:
Its all very interesting I think the report will show things happened very quickly, probably even at the same time.
What worries me more is why did it deviate so far so fast. These aircraft are built to deal with engine failure at v1 at MTOW so really it should have remained a bit more stable. If you watch the airbus tests you usually see a big rudder movement but the aircraft stay fairly straight.
If you’re going solely off the video it looks like no rudder input to keep it on the centreline but with full right aileron. The brain resorts to all sorts of ‘defaults’ under pressure and it wouldn’t be hard to believe that some may try to steer it onto the centreline like it’s a car. I’ve seen all sorts in the sim as there are, as you’d expect, all sorts of levels of ability and experience. What worries me more is why did it deviate so far so fast. These aircraft are built to deal with engine failure at v1 at MTOW so really it should have remained a bit more stable. If you watch the airbus tests you usually see a big rudder movement but the aircraft stay fairly straight.
Not saying that’s the case here. But if you asked me what it would look like if you had an engine failure just before V1 and the pilot not react immediately and retard the thrust levers and use the rudders to keep it on the centreline, well I’d say it would look something like this.
Could well be totally wrong but at that speed it should be well above minimum control speed on the ground and a boot full of rudder should have kept it on the centreline. Even if you’d not retarded the thrust levers you could probably have still accelerated through Vr and gone airborne!
Crumpet said:
gotoPzero said:
Its all very interesting I think the report will show things happened very quickly, probably even at the same time.
What worries me more is why did it deviate so far so fast. These aircraft are built to deal with engine failure at v1 at MTOW so really it should have remained a bit more stable. If you watch the airbus tests you usually see a big rudder movement but the aircraft stay fairly straight.
If you re going solely off the video it looks like no rudder input to keep it on the centreline but with full right aileron. The brain resorts to all sorts of defaults under pressure and it wouldn t be hard to believe that some may try to steer it onto the centreline like it s a car. I ve seen all sorts in the sim as there are, as you d expect, all sorts of levels of ability and experience. What worries me more is why did it deviate so far so fast. These aircraft are built to deal with engine failure at v1 at MTOW so really it should have remained a bit more stable. If you watch the airbus tests you usually see a big rudder movement but the aircraft stay fairly straight.
Not saying that s the case here. But if you asked me what it would look like if you had an engine failure just before V1 and the pilot not react immediately and retard the thrust levers and use the rudders to keep it on the centreline, well I d say it would look something like this.
Could well be totally wrong but at that speed it should be well above minimum control speed on the ground and a boot full of rudder should have kept it on the centreline. Even if you d not retarded the thrust levers you could probably have still accelerated through Vr and gone airborne!
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