EuroHarmony Community Forums
Archive => EuroHarmony VA => Old Forum => Ask EuroHarmony => Topic started by: EHM-0641 Rico on April 20, 2004, 07:07:52 am
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I was at BudaPest LHBP, ready for take off in the PHEH 747-400.
ATC had just cleared me for takeoff. So I turned on to the runway, made a last minute check that all systems were up and running, and started rolling down the runway.
I was approaching V¹ , when suddenly a Cessna , taxiing to his assigned runway, was crossing my path on the runway.
As I hadn't reached V¹ (which is 160 KIAS for the 747-400) , I was going 143 KIAS, it was safe to initiate a RTO.
I set the Auto-Brake setting at RTO.
Applied spoilers, and then reverse thrust.
The reject itself is an emergency maneuver, with emphasis on full braking and correct use of spoilers and reverse as essential to the successful outcome of the maneuver.
Had I not done this, I would have surely striked the Cessna with all catastrophic concequenses that would have followed.
At V1, the decision to initiate an RTO must already have been made and the RTO must already have begun. If there is any hesitation, the remaining time may be insufficient to allow a successful high-speed RTO.
The brakes glow orange-red and reach temperatures of more than 3,500 degrees Fahrenheit from the energy absorbed while halting the airplane. Shortly after the stop, wheel fuse plugs melt to safely release tire pressure. As an result of this RTO, the 747 suffered particially blown tires. The brakes are now useless, and the fuselage is partly damaged by a small fire in the front brake section.
(http://www.boeing.com/news/releases/1999/photorelease/990406a.jpg)
No passengers were harmed.
What I now wanted to know is how are we going to solve this problem.. Thus how long will it take to have the plane repaired. Or is it possible to let another pilot fly one over or so. As for the passengers are still stranded here
In addition for those whom don't know, the definition of V¹ is referred to as "decision speed." This term implies that a airplane could accelerate to that speed (V¹), that the decision to reject or continue could then be made, and that the resulting maneuver would have a successful outcome.
We used the definition of V1 as:
The speed selected for each takeoff, based upon approved performance data and specified conditions, which represents:
The maximum speed by which a rejected takeoff must be initiated to assure that a safe stop can be completed within the remaining runway, or runway and stopway;
The minimum speed which assures that a takeoff can be safely completed within the remaining runway, or runway and clearway, after failure of the most critical engine at a designated speed; and
The single speed which permits a successful stop or continued takeoff when operating at the minimum allowable field length for a particular weight.
Note 1: Safe completion of the takeoff includes both attainment of the designated screen height at the end of the runway or clearway and safe obstacle clearance along the designated takeoff flight path.
Note 2: Reference performance conditions for determining V1 may not necessarily account for all variables possibly affecting a takeoff, such as runway surface friction, failures other than a critical power plant, etc.
Regards,
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;D LOL
Nice image Rico
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Cool pic ain't it?? I found it a couple of months ago in a flight magazine
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is that picture of a real front brake fire? :P
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Nice story Rico
I have seen this happen once about 10 years ago at EHAM.
A KLM boeing 747 was at takeoff when the instruments reported a false fire in the engine alarm. The aircraft was nearing V1 and the pilot did a RTO.
Result: All tyres had blown and the runway was damaged.
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What did this really happen or was it on VATSIM or somthing?
Oh and seeing your stranded at Budapest i could save you ;D
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Originally posted by EHM-0962
is that picture of a real front brake fire? :P
Yes it is .. it from an flight magazine, where they had as topic the new brakes they were installing on all 767's and the 747's. to test them they implement a maximum-energy RTO.
An maximum-energy RTO is a dramatic test that involves accelerating an airplane with fully worn brakes to a takeoff speed of nearly 200 mph, and bringing it to a complete stop using only the brakes and the wing spoilers. Engine thrust reversers are not used to help slow down the airplane in this test.
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I think Maarten should talk to our legal department, and ask them to sue that Cessna pilot or the ATC.;D Sadly it isn’t the first time something like this has happen. I hope you got his number
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As a kind of follow up to pauls reply I saw a KLM Jumbo at EHAM taking off. Then for some reason, he slamed the brakes on and there was red glow from the Wheels, then 6 fire engines came out. Everything ended safe thought Phew!!:]:]
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Originally posted by Merlin
I think Maarten should talk to our legal department, and ask them to sue that Cessna pilot or the ATC.;D Sadly it isn’t the first time something like this has happen. I hope you got his number
Indeed, they should pay for the damage cause, plus our expenses to accomodate all the stranded patients in hotels.
The number is N700MS
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Originally posted by EHM-0641
Originally posted by Merlin
I think Maarten should talk to our legal department, and ask them to sue that Cessna pilot or the ATC.;D Sadly it isn’t the first time something like this has happen. I hope you got his number
Indeed, they should pay for the damage cause, plus our expenses to accomodate all the stranded patients in hotels.
The number is N700MS
Patients?? Passengers, shurely...
;D
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Originally posted by Murray Crane
Patients?? Passengers, shurely... ;D
hahaha just saw it... was about to change it when u posted :D
(it's 04:26 ..kinda tired hehehe...)