FedEx MD-11 crash at Narita
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Re: FedEx MD-11 crash at Narita
not sure and don't have time look into it right now...... the ground spoiler system doesn't require weight on wheels input.
LOL100% incorrect Ever hear of Ferry Permit? issued for Non airworthy aircraftno such thing as "barely airworthy" it's either Airworthy or Notyou still have to find a crew willing to fly this "barely airworthy" heap
- flyboy2548m
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Re: FedEx MD-11 crash at Narita
That's certainly interesting.not sure and don't have time look into it right now...... the ground spoiler system doesn't require weight on wheels input.
"Lav sinks on 737 Max are too small"
-TeeVee, one of America's finest legal minds.
-TeeVee, one of America's finest legal minds.
Re: FedEx MD-11 crash at Narita
Probably - "The aft wheel ground speed is more than 80 knots" and "The radio altimeter is less than seven feet" says "we're on the ground"
LOL100% incorrect Ever hear of Ferry Permit? issued for Non airworthy aircraftno such thing as "barely airworthy" it's either Airworthy or Notyou still have to find a crew willing to fly this "barely airworthy" heap
- flyboy2548m
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Re: FedEx MD-11 crash at Narita
Granted, but on our aircraft you need a WOW input, a wheel speed input and an RA input before the ground spoilers move.Probably - "The aft wheel ground speed is more than 80 knots" and "The radio altimeter is less than seven feet" says "we're on the ground"
"Lav sinks on 737 Max are too small"
-TeeVee, one of America's finest legal minds.
-TeeVee, one of America's finest legal minds.
Re: FedEx MD-11 crash at Narita
Ok, I was wrong, Ground spoilers takes WOW into account for Rejected Takeoff (but not Landing) -
The auto ground spoiler system will automatically extend the spoilers when the FCC-1/FCC-2 receives the following conditions:
- The aft wheel ground speed is more than 80 knots
- The nose gear is on the ground
- The flap position transmitter and the FADEC inputs are correct
- When two of the three throttles are in the thrust condition
- The flaps are extended more than 31.5°.
The auto ground spoiler system will automatically extend the spoilers when the FCC-1/FCC-2 receives the following conditions:
- The aft wheel ground speed is more than 80 knots
- The nose gear is on the ground
- The flap position transmitter and the FADEC inputs are correct
- When two of the three throttles are in the thrust condition
- The flaps are extended more than 31.5°.
LOL100% incorrect Ever hear of Ferry Permit? issued for Non airworthy aircraftno such thing as "barely airworthy" it's either Airworthy or Notyou still have to find a crew willing to fly this "barely airworthy" heap
- flyboy2548m
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Re: FedEx MD-11 crash at Narita
So, it actually waits for the nose gear. Even more interesting.Ok, I was wrong, Ground spoilers takes WOW into account for Rejected Takeoff (but not Landing) -
The auto ground spoiler system will automatically extend the spoilers when the FCC-1/FCC-2 receives the following conditions:
- The aft wheel ground speed is more than 80 knots
- The nose gear is on the ground
- The flap position transmitter and the FADEC inputs are correct
- When two of the three throttles are in the thrust condition
- The flaps are extended more than 31.5°.
"Lav sinks on 737 Max are too small"
-TeeVee, one of America's finest legal minds.
-TeeVee, one of America's finest legal minds.
Re: FedEx MD-11 crash at Narita
Not when landing.
LOL100% incorrect Ever hear of Ferry Permit? issued for Non airworthy aircraftno such thing as "barely airworthy" it's either Airworthy or Notyou still have to find a crew willing to fly this "barely airworthy" heap
- flyboy2548m
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Re: FedEx MD-11 crash at Narita
Got it, thanks.Not when landing.
"Lav sinks on 737 Max are too small"
-TeeVee, one of America's finest legal minds.
-TeeVee, one of America's finest legal minds.
Re: FedEx MD-11 crash at Narita
Stupid question: An airliner (MD-11) without spoilers can bounce like a Cessna flown by a student pilot???
...except the Cessna gradually develops nosewheely shimmy while an MD-11 breaks it's wing off (along with other differences like 3 feet versus 30 feet in the bounce)
...except the Cessna gradually develops nosewheely shimmy while an MD-11 breaks it's wing off (along with other differences like 3 feet versus 30 feet in the bounce)
Commercial Pilot, Vandelay Industries, Inc., Plant Nutrient Division.
Re: FedEx MD-11 crash at Narita
No, David, he means the missed apoproach of a TAP-Air Portugal 320 in Lisbon.I guess you mean the infamous LH landing at Hamburg...It reminded me of that video of the A320 in Spain landing in high winds, going side to side and the nose up and down just like this MD11. But that A320 was able to climb right after the pilot pulled the yoke. Sorry, the "side stick".
http://airdisaster.info/10/forums/viewt ... &sk=t&sd=a
If it's the one I'm thinking of, I think that was a fake.
- Dmmoore
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Re: FedEx MD-11 crash at Narita
Glenn is correct. FCC-1 and FCC-2 receive flap position, wheel speed and RA signals. The FCC will trigger spoiler deployment if all conditions are satisfied (Wheel speed >80 Knots Flaps >31 degrees, RA 7 +or-1 feet). and they are armed. if the spoilers have not extended by the time the nose gear strut compresses, the spoilers will deploy if they are armed.
Don
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Re: FedEx MD-11 crash at Narita
Well, it's possible, but he said Spain, and Lisbon is in Portugal, or it was when I went to school. Still, some years ago there was a notorious video of a fake rough landing in an A319 or A320 in Spain in an unmarked airframe whch was some form of commercial advertising (beer, I think).No, David, he means the missed apoproach of a TAP-Air Portugal 320 in Lisbon.
Re: FedEx MD-11 crash at Narita
HUH?Stupid question: An airliner (MD-11) without spoilers can bounce like a Cessna flown by a student pilot???
...except the Cessna gradually develops nosewheely shimmy while an MD-11 breaks it's wing off (along with other differences like 3 feet versus 30 feet in the bounce)
Re: FedEx MD-11 crash at Narita
[quote="Carlos G
If it's the one I'm thinking of, I think that was a fake.[/quote]
No, David, he means the missed apoproach of a TAP-Air Portugal 320 in Lisbon.[/quote]
Yes, that's the one. Sorry I said Spain earlier. But I was close....Portugal and Spain are neighbors
If it's the one I'm thinking of, I think that was a fake.[/quote]
No, David, he means the missed apoproach of a TAP-Air Portugal 320 in Lisbon.[/quote]
Yes, that's the one. Sorry I said Spain earlier. But I was close....Portugal and Spain are neighbors
- Schorsch
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Re: FedEx MD-11 crash at Narita
If the people from FedEx are no total jerks a cargo shift is unlikely. Restraint systems normally take quite a load, which is far beyond the loads you'll have in normal flight. You need some kind of crash conditions.What about cargo shifting to the front of the airplane during the first touchdown?
That will make the nose fall down quickly and if a go around was attempted and power applied, the nose goes up because of the "bounce" and power and surface inputs, but center of gravity too much to the front quicly makes it go down again?
Publicly, we say one thing... Actually, we do another.
FAO ITS
First of all- condolences.
As stated above, you no-doubt know the pilots.
Now for a question.
When reading PPrune, a lot of folks claiming to be DC-10 and MD-11 pilots are saying that the DC-10 is a pleasure to fly and that an MD-11 is a handful- espcially in gusty cross winds (and blaming some of that on the MD-11 having a markely smaller horizontal stabilizer.
Would you agree that the MD-11 is harder to fly?
As stated above, you no-doubt know the pilots.
Now for a question.
When reading PPrune, a lot of folks claiming to be DC-10 and MD-11 pilots are saying that the DC-10 is a pleasure to fly and that an MD-11 is a handful- espcially in gusty cross winds (and blaming some of that on the MD-11 having a markely smaller horizontal stabilizer.
Would you agree that the MD-11 is harder to fly?
Commercial Pilot, Vandelay Industries, Inc., Plant Nutrient Division.
Re: FedEx MD-11 crash at Narita
PIO
Interesting reading from someone ITS knows........
http://www.jetcareers.com/content/view/82/157/
Interesting reading from someone ITS knows........
http://www.jetcareers.com/content/view/82/157/
LOL100% incorrect Ever hear of Ferry Permit? issued for Non airworthy aircraftno such thing as "barely airworthy" it's either Airworthy or Notyou still have to find a crew willing to fly this "barely airworthy" heap
- Dmmoore
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Re: FedEx MD-11 crash at Narita
Is the MD-11 harder to fly than the DC-10? I'll leave the definitive answer to those that fly the two aircraft. What follows is from my experience with the aircraft during test flights.
The MD-11 handles differently, primarily in pitch, than the DC/MD-10. The MD-11 likes a fully stabilized approach. The DC/MD-10 will tolerate a little more variance. Gusty winds complicate stabilizing an approach. The MD-11's smaller horizontal stabilizer seems to be the main reason for the difference. The smaller stabilizer is one of the aerodynamic improvements in the MD-11. To compensate, the elevators are larger (longer) and LSAS was installed.
An MD-11 pilot should have no problem with the MD-10. A DC-10 pilot will have no problem with the MD-10 but will need to learn the differences in the MD-11's quirks.
It isn't so much harder as it is different. Similar to a Cessna 152 being different than a Piper Tomahawk. Both fly equally well but require different pilot skills to keep them flying safely.
The MD-11 handles differently, primarily in pitch, than the DC/MD-10. The MD-11 likes a fully stabilized approach. The DC/MD-10 will tolerate a little more variance. Gusty winds complicate stabilizing an approach. The MD-11's smaller horizontal stabilizer seems to be the main reason for the difference. The smaller stabilizer is one of the aerodynamic improvements in the MD-11. To compensate, the elevators are larger (longer) and LSAS was installed.
An MD-11 pilot should have no problem with the MD-10. A DC-10 pilot will have no problem with the MD-10 but will need to learn the differences in the MD-11's quirks.
It isn't so much harder as it is different. Similar to a Cessna 152 being different than a Piper Tomahawk. Both fly equally well but require different pilot skills to keep them flying safely.
Don
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Re: FedEx MD-11 crash at Narita
I don't think the wind was a big factor in this one.It seems to me that at the first touchdown and at the second touchdown, the smoke from the tires is normal, without being blown away from gusty wind. Also the smoke from the fire after the crash doesn't look like there were very gusty wind conditions.I just heard winds were extreme...gusts of around 90knots had been recorded....speculation around a strong gust of wind at the point of touchdown....resulted in extremely hard touch down, bounce and came down on its nose gear....would be interesting to hear the CVR!!!
Re: FedEx MD-11 crash at Narita
another youtube video
http://www.youtube.com/watch?v=FUhk1EInxls
doesn't really look like calm conditions to me
http://www.youtube.com/watch?v=FUhk1EInxls
doesn't really look like calm conditions to me
Re: FedEx MD-11 crash at Narita
No, it wasn't calm.......
It's difficult to see in the videos but I have a question in my mind about the flap position.
It's difficult to see in the videos but I have a question in my mind about the flap position.
LOL100% incorrect Ever hear of Ferry Permit? issued for Non airworthy aircraftno such thing as "barely airworthy" it's either Airworthy or Notyou still have to find a crew willing to fly this "barely airworthy" heap
Re: FedEx MD-11 crash at Narita
I can't find where I wrote calm conditions. But I agree that it was a nice (almost blowing with the same strength during the film sequence) strong (almost) headwind. And not one gust from their right side.another youtube video
http://www.youtube.com/watch?v=FUhk1EInxls
doesn't really look like calm conditions to me
A sad ending though on that video...
- Dmmoore
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Re: FedEx MD-11 crash at Narita
The winds were more or less down the runway, 300 at 20 gusting to 40 Knots. 40 knots = 72 km.
I believe wind gusts and/or wind shear may have played a roll.
I believe wind gusts and/or wind shear may have played a roll.
Don
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Re: FedEx MD-11 crash at Narita
Don,The winds were more or less down the runway, 300 at 20 gusting to 40 Knots. 40 knots = 72 km.
I believe wind gusts and/or wind shear may have played a roll.
Help me here with one point: you mention wind gusting between 20 and 40 knots, right? That can (under the most negative cicumstances imaginable) make a very big difference in speed at touch-down and if so could this be the cause for an abnormal hard landing and that subsequent bumping-up after the first touch-down on (maybe only the left) MLG? Even if the pilots augmented the approach speed (Vref?) a bit for compensating the unstable wind conditions, if at t/d there is a sudden drop in wind speed of said 20 knots and if the MD-11 was heavy the subsequent bump can induce the bouncing up we saw, correct? At least in theory and this is only to be regarded as a question of a layman.
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Re: FedEx MD-11 crash at Narita
I guess the pilots accounted for these gusts and corrected Vref upwards. As consequence, it came out pretty high.Don,The winds were more or less down the runway, 300 at 20 gusting to 40 Knots. 40 knots = 72 km.
I believe wind gusts and/or wind shear may have played a roll.
Help me here with one point: you mention wind gusting between 20 and 40 knots, right? That can (under the most negative cicumstances imaginable) make a very big difference in speed at touch-down and if so could this be the cause for an abnormal hard landing and that subsequent bumping-up after the first touch-down on (maybe only the left) MLG? Even if the pilots augmented the approach speed (Vref?) a bit for compensating the unstable wind conditions, if at t/d there is a sudden drop in wind speed of said 20 knots and if the MD-11 was heavy the subsequent bump can induce the bouncing up we saw, correct? At least in theory and this is only to be regarded as a question of a layman.
A 20 knot horizontal gust (relative to prevailing winds), and considering a 170KIAS approach speed, causes a sudden increase to 190KIAS, which is similar to an increase in vertical load factor of 25% (1.25g). That would account for some vertical movement and a sudden bump.
We know that the MD-11 is particularly tricky at touch down.
It would be bad if it turns out that the pilots acted correctly (maybe not hero-like, but still in line with normal FedEx standards) and still crashed. It would mean that the aircraft cannot be handled safely under such circumstances by a normal crew. After all, they are no Space Shuttle pilots.
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