Aviation

The amount of lift generated from an airfoil is proportional to the square of the velocity over the air going it. We generally take off with lower than max engine thrust (for cost savings and safety reasons) and retract flaps at 1000 feet after gaining sufficient speed, but if you accidentally retract the flaps, you can add thrust to max and pitch down, both of which will increase the velocity of the air going over the wings and generate enough lift. If you are down to one engine, that makes the job quite a bit tougher.

We also don't really touch anything until 1000 feet in the event of an engine failure, to prevent us from accidentally messing something up at a low altitude.
Notice the bold. I get all of this. But what if you don't realize that the flaps were accidently retracted? How much time do you have to make corrections? They were only at 625 feet when they started losing altitude. You don't have time to pitch down and gain speed.
 
Notice the bold. I get all of this. But what if you don't realize that the flaps were accidently retracted? How much time do you have to make corrections? They were only at 625 feet when they started losing altitude. You don't have time to pitch down and gain speed.
You will notice the accidental flap retraction almost immediately, as stall warnings will trigger nearly instantly. 600 feet is plenty with both engines running. It will be hard to override your urge to pitch down when you see the ground coming at you quickly, but just leveling off with max thrust should be fine, especially if the aircraft is well under max takeoff weight, which this one was. I fly Airbus, and the auto thrust will go to TOGA (max thrust) and lock itself if that configuration until you take some steps to take it out of max. I assume the 787 has something similar.
 
You will notice the accidental flap retraction almost immediately, as stall warnings will trigger nearly instantly. 600 feet is plenty with both engines running. It will be hard to override your urge to pitch down when you see the ground coming at you quickly, but just leveling off with max thrust should be fine, especially if the aircraft is well under max takeoff weight, which this one was. I fly Airbus, and the auto thrust will go to TOGA (max thrust) and lock itself if that configuration until you take some steps to take it out of max. I assume the 787 has something similar.
We know one thing by the video. They did not put the nose down. It looked like they were coming down for a landing, flair and all. Double engine failure? I think I hear the engines in the original video, not the one from the cell phone.

After an accident and the full report is released, which is like a year later. There are people that will go through it all and make a video of everything that happened from beginning to end. What was said, and actions that were taken. What I noticed on a lot of these are that pilots get stressed. Even when warnings appear, they have to identify why that is happening, go through a checklist. And in a very limited amount of time. In many cases they do not. It's terrifying to tell you the truth.

If you fly an airbus, can it take off without flaps? What if you didn't know the reason you were losing altitude because flaps were retracted instead of landing gear? How much time to do you have to correct the mistake?
 
The pilots I've seen talk about this all seem to agree that the emergency Ram Air Turbine had automatically deployed very soon after the plane rotated.

Seems to indicate a catastrophic failure on takeoff?
 
If you fly an airbus, can it take off without flaps?
I have no idea what I am talking about but I did watch a pilot configure a 787 exactly like this one was and set the atmospheric conditions exactly as they were. He thought the plane would be sluggish but could accomplish the takeoff and that is how it played out in the simulator.

He mentioned the combo of high heat and low pressure was far less than ideal.
 
Let me be clear of one thing. I have no idea what happened. It could be a complete loss of engines. I don't know. The two posts before me suggested the RAT might have been deployed. I've heard that before as well. We really don't know.
 
The pilots I've seen talk about this all seem to agree that the emergency Ram Air Turbine had automatically deployed very soon after the plane rotated.

Seems to indicate a catastrophic failure on takeoff?
The ram air only deploys if both engines are out; without it there is no real electrical power. What batteries it has basically is enough for emergency lights and things like that.
That has always bothered me about all current airliners: no emergency backup batteries.
 
The ram air only deploys if both engines are out; without it there is no real electrical power. What batteries it has basically is enough for emergency lights and things like that.
That has always bothered me about all current airliners: no emergency backup batteries.
The pilots I've seen talk about it describe its purpose as providing emergency backup to critical hydraulic and/or electrical failures. Can be deployed manually any time or automatically in any of four different scenarios. Dual engine out being one of them. It will run the flight controls but not the landing gear. Give you enough electricity to fly the plane, navigate and communicate.

I didn't know what a RAT was two days ago so I'm just going off the pilots I've watched on YT.

It seems almost certain that the RAT was deployed.
 
You will notice the accidental flap retraction almost immediately, as stall warnings will trigger nearly instantly. 600 feet is plenty with both engines running. It will be hard to override your urge to pitch down when you see the ground coming at you quickly, but just leveling off with max thrust should be fine, especially if the aircraft is well under max takeoff weight, which this one was. I fly Airbus, and the auto thrust will go to TOGA (max thrust) and lock itself if that configuration until you take some steps to take it out of max. I assume the 787 has something similar.
Passenger or cargo? What routes and for how long? Yeah I ask a lot of questions but have always been fascinated with high tech equipment operators.
 
We know one thing by the video. They did not put the nose down. It looked like they were coming down for a landing, flair and all. Double engine failure? I think I hear the engines in the original video, not the one from the cell phone.

After an accident and the full report is released, which is like a year later. There are people that will go through it all and make a video of everything that happened from beginning to end. What was said, and actions that were taken. What I noticed on a lot of these are that pilots get stressed. Even when warnings appear, they have to identify why that is happening, go through a checklist. And in a very limited amount of time. In many cases they do not. It's terrifying to tell you the truth.

If you fly an airbus, can it take off without flaps? What if you didn't know the reason you were losing altitude because flaps were retracted instead of landing gear? How much time to do you have to correct the mistake?
No, we always takeoff with a minimum of flaps 1, up to 3. You would know instantly if the flaps were inadvertently retracted. We retract them at 1000 feet, so while 600 feet is bad, it’s not unrecoverable. You have a decent amount of time, maybe 20 seconds for the engines to spool up. At TOGA thrust, they produce a lot of thrust.

Passenger or cargo? What routes and for how long? Yeah I ask a lot of questions but have always been fascinated with high tech equipment operators.
I’ve been flying for close to 25 years. I’ve been a passenger airline pilot for the last 7. I work for a major legacy airline. I did corporate/charter business jet flying before.

The ram air only deploys if both engines are out; without it there is no real electrical power. What batteries it has basically is enough for emergency lights and things like that.
That has always bothered me about all current airliners: no emergency backup batteries.
There are batteries, in addition to the RAT.
 
No, we always takeoff with a minimum of flaps 1, up to 3. You would know instantly if the flaps were inadvertently retracted. We retract them at 1000 feet, so while 600 feet is bad, it’s not unrecoverable. You have a decent amount of time, maybe 20 seconds for the engines to spool up. At TOGA thrust, they produce a lot of thrust.


I’ve been flying for close to 25 years. I’ve been a passenger airline pilot for the last 7. I work for a major legacy airline. I did corporate/charter business jet flying before.


There are batteries, in addition to the RAT.
but the RAT is necessary to retain control, right?
 
but the RAT is necessary to retain control, right?
I can't speak to the 787, but in the other airliners I have flown, the batteries alone can sustain flight for 15-30 minutes, with very limited systems. The systems shed to lower the load on the batteries to provide just the bear essentials. Generally, if you have time, you will use the batteries to start the APU, which will give you electrical power, like Sully did.

Each engine has a generator, the APU has a generator, the RAT is a generator, and you have the ship batteries.
 
No, we always takeoff with a minimum of flaps 1, up to 3. You would know instantly if the flaps were inadvertently retracted. We retract them at 1000 feet, so while 600 feet is bad, it’s not unrecoverable. You have a decent amount of time, maybe 20 seconds for the engines to spool up. At TOGA thrust, they produce a lot of thrust.


I’ve been flying for close to 25 years. I’ve been a passenger airline pilot for the last 7. I work for a major legacy airline. I did corporate/charter business jet flying before.


There are batteries, in addition to the RAT.
So you fly Airbus, maybe you have flown Boeing too. My question is as a pilot can you control these planes to do what you think should be done. Example would be a car, I have a couple of high performance cars where I can pretty much control them how I feel then need to be controlled. Is flying a big Airbus the same or much more controlled by physics? In other words, you get into a deep dive, can you get back control easily or it would be a real fight. I’m probably not too clear here. Anyways, congrats on a rather cool job!
 
So you fly Airbus, maybe you have flown Boeing too. My question is as a pilot can you control these planes to do what you think should be done. Example would be a car, I have a couple of high performance cars where I can pretty much control them how I feel then need to be controlled. Is flying a big Airbus the same or much more controlled by physics? In other words, you get into a deep dive, can you get back control easily or it would be a real fight. I’m probably not too clear here. Anyways, congrats on a rather cool job!
Everything is very standardized in the USA and our training is very good, so pilots generally know the airplane well. Most airplanes of the same type fly in a similar fashion, they just have specific quirks and features. In other parts of the world, the training isn't so great.. I want to be clear, though, we don't know what happened and I am not blaming anyone. We need to wait and see.
 
Everything is very standardized in the USA and our training is very good, so pilots generally know the airplane well. Most airplanes of the same type fly in a similar fashion, they just have specific quirks and features. In other parts of the world, the training isn't so great.. I want to be clear, though, we don't know what happened and I am not blaming anyone. We need to wait and see.
Why does the RAT deploy? Is that for a loss of power? Because you can hear it too. It would be a horrible coincidence if something went wrong past the point that they could abort the takeoff.
 
Why does the RAT deploy? Is that for a loss of power? Because you can hear it too. It would be a horrible coincidence if something went wrong past the point that they could abort the takeoff.
We’re still not sure the RAT deployed. Again, I don’t know the 787, but in general, it is deployed automatically when an essential electrical bus loses power or manually by the pilots. A dual engine failure would cause it to deploy.
 
We’re still not sure the RAT deployed. Again, I don’t know the 787, but in general, it is deployed automatically when an essential electrical bus loses power or manually by the pilots. A dual engine failure would cause it to deploy.
They have better video out which shows what most assuredly is the RAT. The second telltale is the sound the RAT makes which is likened to a small two blade prop plane. That is evident on the video.
 

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