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Nah not tyre wear
Tyres are cheap. The stress is on the members and wing roots. Hard turns are not good. Can happen quite fast in the life of the airplane. I bet Japan operators have these issues on the short hops. As well as the freight guys of course. See FedEx at Memphis.
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With my operator 90 degree turns are limited to 10 kts max to minimise tyre wear (monitored by OFDM so no cheating!)
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32o driver,
Flight crew training manual will give you such info about NOSE wheel tyre wear during fast taxi...(B737). Concerning the line up thing,here is the copied info taken from boeing safety guide: 2.3.6.3 Runway Lineup Positioning the aircraft on the runway in preparation for takeoff is an important element in maximizing the amount of pavement available for a possible RTO maneuver. Correction to the available runway length can be made to the takeoff analysis on those runways where it is not possible to position the airplane at the beginning of the published distance. Correct runway lineup technique should always be practiced regardless of whether or not there is excess runway available. Even if an allowance has been made, it is up to the crew operating the flight to align the airplane on the runway using the shortest possible distance. If they can do it in a shorter distance than taken into account by their company, then there is that much extra margin for the takeoff.' FIREFLY< On a 737/800-900, a 9 kts entry followed by a 6-7 knots turn will get you lined up without thrust.10 kts into the turn is bit too fast i think. |
DERG, I agree that member/strut/root strain is a major concern. However, if your tyres are cheap can I have the name of your supplier. Although one wonders whether Air France still use cheaper retreads since the Concorde accident.
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Haha
"line up and wait" hope the main gear is OK....
"line up and hold" hope the main gear holds up 320 That whole Concorde tyre thing was a JOKE. As though Michelin was above making the proper tyre which they could so easily have done. It was a French thing. |
de facto
airbus give reference to tyre wear at high speed but specifically refer to turning at high speed as the issue. An aircraft manufacturer does not have to take account of the commercial environment. A Captain does (or should) and any Captain who states that wear/damage issues are someone elses concern would be very unwelcome in my airline. Its your job to balance these issues not just take a blind view. On a limiting runway I absolutely agree that one should maximise the TORA but on a generous runway operating well inside liimts (LHR27L on a moderate weight medium twin) there is NO EXCUSE for the additonal inconvenience/cost to others and your own airline. |
airbus give reference to tyre wear at high speed but specifically refer to turning at high speed as the issue. If you give me the info every flight about this extra runway based on my calculated V1 (assumed thrust or not) (medium weight or not)and I will consider using the extra distance for line up.. I have other ways to save money to my airline but thanks.It seems Im excused as we are closely monitored.... No EXCUSE? THAT is funny:E |
de facto
What brand tyres are used in China please?
Has Hankook got round to this yet.... or are they mostly Bridgestones? |
Certainly better quality than those you use in your LOCO airline.:E
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We get ours at the wreckers yard..
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de facto
If you think it is acceptable to inconvenience others and cause delay and cost to them just because you aren't bright enough to work out when it is or is not appropriate to take a practical approach to your operation then I can only sigh with relief that you are not UK based. Please tell me you're not a Captain. That would be scary. |
:hmm:
I am causing delay now? I am well familiar with loco UK airports...never had any issue on my 'lenghy' costly line up method. If im asked to expedite,i will...dont take me wrong...but a long line up followed by a stop and then a take off roll, i say N0. Ill leave that to your superior UK captainship. OH and i do this crazy stuff based on a UK caa issued ATPL...thats food for thought.:ugh: |
I'm losing the plot here......this "LOCO" stuff is confusing me..
Here we go: "Loco is Crazy in Spanish" Could be BA "speak" due to merger with Iberia? |
:E
Or maybe LOCA.... |
I see....
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seriously A320
If Im 3 T below my runway limit weight...how much extra stopping distance would that give me? 200m?100m?50m? What about 4Tonnes?or 5T? Does BA give you this info? What if on that day,i were slower to initiate reject that day?(tired..)..how much these few extra knots convert into meters? Yes we must balance between many factors, if im cleared for immediate take off, i will use shallow entry as thrust is increased during the line up which counteracts the loss of runway length./or shallower entry if runway is covered by snow or narrow runway... But please get off your BA HORSE and keep your Captain worth recommendations for your cadets..:suspect: |
Question
320 is off line...If there is doubt about runway length...why not
At the hold position...spool up the engine with the brakes on..then release say with throttle at 75%.. Or is this a big NO NO? |
DERG,
Are you flying Jets? |
at moment a Toyota Corolla until I get the Porsche insured..
jets are diff? seriously...are jets diff to anything else? are we talking jet blast behind here or what? complaints from the tree huggers? |
BA may have an issue with 90 degree lineups since the incident up in ABZ a few years ago.
http://www.aaib.gov.uk/cms_resources...CT%2006-07.pdf |
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