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#1
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Curious incident :)
Saw an amusing incident today at the Dubai Airport; hadn't ever seen
such a thing earlier. A Dragonair 747 taxied on to the east-west aligned runway at the western end. Although the runway threshold is just east of that point, the aircraft turned west and did a 180 at the adjoining circular tarmac pad. Just as it centered on the runway, a FedEx MD-11 landed from above in front of it. I noticed that the MD-11 had barely begun its turn on the exit at the far end when smoke came off the 747 tires. The takeoff roll had begun. Though the runway sequence was very time-efficient, it left me feeling that it'd have been fun had the MD-11 come slightly low in the glideslope or encountered mild windshear ) How often does such a sequence happen where you live? Ramapriya |
#2
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Curious incident :)
In a previous article, "Ramapriya" said:
in front of it. I noticed that the MD-11 had barely begun its turn on the exit at the far end when smoke came off the 747 tires. The takeoff roll had begun. Since when does smoke come of the tires of a plane starting its takeoff roll? I can't think of any way that could happen. -- Paul Tomblin http://xcski.com/blogs/pt/ I think I have a new personal rule: Never watch anything which includes the author's name in the title, particularly if the author is dead. -- Andrew Dalgleish |
#3
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Curious incident :)
In article . com,
"Ramapriya" wrote: Saw an amusing incident today at the Dubai Airport; hadn't ever seen such a thing earlier. A Dragonair 747 taxied on to the east-west aligned runway at the western end. Although the runway threshold is just east of that point, the aircraft turned west and did a 180 at the adjoining circular tarmac pad. Just as it centered on the runway, a FedEx MD-11 landed from above in front of it. I noticed that the MD-11 had barely begun its turn on the exit at the far end when smoke came off the 747 tires. The takeoff roll had begun. Though the runway sequence was very time-efficient, it left me feeling that it'd have been fun had the MD-11 come slightly low in the glideslope or encountered mild windshear ) How often does such a sequence happen where you live? Ramapriya Aircraft should NEVER be cleared to "position and hold" with landing traffic on final, unless they can take off and clear the runway before the landing traffic arrives. It sounds like either a controller error or a Dragonair pilot error. -- Remve "_" from email to reply to me personally. |
#4
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Curious incident :)
Paul Tomblin wrote:
In a previous article, "Ramapriya" said: in front of it. I noticed that the MD-11 had barely begun its turn on the exit at the far end when smoke came off the 747 tires. The takeoff roll had begun. Since when does smoke come of the tires of a plane starting its takeoff roll? I can't think of any way that could happen. If I understood the OP correctly, the 747 was starting its takeoff roll as an MD11 landed in front of him. The 747 probably hit the brakes really hard. To answer the original question (have I seen this before?): no, never. I was once cleared into position and hold, but spotted traffic on short final, so I held short, and told the controller about it. He apologized, moments later a different controller replaced him. This has happened in the USA though. You may all remember the 737 that landed on top of a Brasilia (or some turboprop) at LAX in the late 80's. -jav |
#5
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Curious incident :)
Paul Tomblin wrote:
Since when does smoke come of the tires of a plane starting its takeoff roll? I can't think of any way that could happen. Don't know about you but I've seen puffs come off aircraft tires, at the start of the takeoff roll, often enough; it probably happens when pilots advance the throttle a bit before releasing the brakes. Ramapriya |
#6
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Curious incident :)
Javier Henderson wrote:
If I understood the OP correctly, the 747 was starting its takeoff roll as an MD11 landed in front of him. The 747 probably hit the brakes really hard. No, quite certain that that didn't happen. From what I saw, the 747 stood there waiting for the MD-11 to land and exit before taking off. He probably chose to enter the runway because that portion was beyond the threshold. Not sure if I've conveyanced in words correctly here :\ This has happened in the USA though. You may all remember the 737 that landed on top of a Brasilia (or some turboprop) at LAX in the late 80's. Ah, but there's likely a difference here, as I've said above. The aircraft in this instance was holding *beyond* the threshold. Ramapriya |
#7
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Curious incident :)
"Ramapriya" wrote in message
oups.com... Paul Tomblin wrote: Since when does smoke come of the tires of a plane starting its takeoff roll? I can't think of any way that could happen. My thoughts exactly. Don't know about you but I've seen puffs come off aircraft tires, at the start of the takeoff roll, often enough; it probably happens when pilots advance the throttle a bit before releasing the brakes. I've never seen that, nor even heard of it. The proposed explanation you suggest certainly wouldn't do it. Smoke comes off the tires during touchdown because of the speed difference between the tire and the pavement, until the tire "catches up". During takeoff, even if the brakes are held, and even if the tires slide a bit (which is very unlikely...usually the locked wheels can hold the airplane still), they wouldn't smoke. They'd just rub a bunch of rubber onto the pavement. If you saw smoke during the takeoff roll, it came from somewhere other than the tires. Pete |
#8
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Curious incident :)
Just a stab here, but the smoke coulda been from a locked up brake
assembly. It does sound like the 747 was cleared to position and hold in front of a landing aircraft. Unless something was lost in translation? |
#9
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Curious incident :)
Maybe the 747's takeoff clearance was cancelled as the controller has
to maintain runway separation and the MD was still on the runway? |
#10
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Curious incident :)
"Ramapriya" wrote No, quite certain that that didn't happen. From what I saw, the 747 stood there waiting for the MD-11 to land and exit before taking off. He probably chose to enter the runway because that portion was beyond the threshold. Not sure if I've conveyanced in words correctly here :\ I also can not imagine what could cause what you said. You said smoke left the tires of the 747? What would cause tires of a stopped aircraft (just beginning to roll) to smoke? -- Jim in NC |
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