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AN-124 - why it has to stay on the runway so long before t/o?

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AN-124 - why it has to stay on the runway so long before t/o?

Old 24th Apr 2007, 20:58
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AN-124 - why it has to stay on the runway so long before t/o?

The AN-124 has recently became a frequent visitor at my home base - actually it comes there every day. What I have noticed is that every time after lining up the runway, the crew says they need about 3-5 minutes before they can commence the takeoff. It usually causes quite a lot of mess in the airspace of what is a relatively calm airport. I can't imagine what would happen in say LHR, or FRA So - why do they have to stay so long on the runway?
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Old 24th Apr 2007, 22:11
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I think they have to do an engine run before releasing brakes.
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Old 24th Apr 2007, 22:23
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Yes they have to spool up the engines slowly over a period of time to full power allowing them to stabilize at set rpm's, about 10 mins in total if i remember correctly.
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Old 24th Apr 2007, 22:28
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I haven't noticed that at MSP. They taxi out and scoot.
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Old 24th Apr 2007, 22:36
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Then I'd suggest you're not looking at a 124. They always do the power check from what I've seen (and I've worked at one airfield where the beast is very nearly a daily visitor).

The conspiracy theories have it that the Lotarev's on the 124 (and 225) were "heavily based" on the GE CF6, after some were acquired by the Soviets from a DC10 that was trapped on the ground in Kabul when they invaded Afghanistan!
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Old 24th Apr 2007, 23:06
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Originally Posted by Wycombe

Then I'd suggest you're not looking at a 124.
Did you just suggest that an airline pilot doesn't know what a Ruslan looks like?
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Old 24th Apr 2007, 23:20
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An-124s are very frequent visitors at my local, EMA/EGNX, and without exception the crew always request 3-4 mins on the runway to run up the engines - my understanding is its to do with stabilizing the internal temperatures - never has one just 'taxied and scooted' so i can't see why this would be any different for any other airport they operate from.

-Regards, RP
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Old 25th Apr 2007, 07:50
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Flyboyike, yes perhaps I did, but I've met plenty of other pilots who don't have the best of a/c recognition skills, so don't feel I further need to justify that statement.

As others have said, they always do the power check.

I was at the Farnborough Airshow the day one blew an engine at the start of the display take-off roll - it was a big bang
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Old 25th Apr 2007, 12:56
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Originally Posted by Wycombe
Flyboyike, yes perhaps I did, but I've met plenty of other pilots who don't have the best of a/c recognition skills, so don't feel I further need to justify that statement.
You're right, I could have easily confused it with any of the dozens of other extremely large, high-winged, four-engine, conventional tail, 84000-series-tail-numbered aircraft. Sorry.
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Old 25th Apr 2007, 13:00
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Wycombe: I was at that one too and didn't notice the bang, but I was a bit surprised when he abandoned takeoff as I was the Tower Controller at the time!
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Old 25th Apr 2007, 13:20
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with respect how would you "notice" the bang if you were cocooned in the tower? also why is ATCO suprised to see an RTO?

not being smart.....just interested in your thoughts chevron and what angle you guys have.

rgds

b
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Old 25th Apr 2007, 15:53
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they have to in the uk and im sure they do it everywhere else as well. As far as I know the oil seals can be blown easily if they put to much power on to quickly.
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Old 26th Apr 2007, 00:36
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When i was working in Shannon(EINN) there was always one or two AN-124's based there (Volga-Dnepr) as i remember and we would frequently watch them come and go. They always requested a few minutes on the runway before takeoff. Also had the pleasure of seeing the 225 there one night, fantastic sight.
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Old 26th Apr 2007, 00:42
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84000-series-tail-numbered aircraft
er, An-124/225 are in the 82000 range actually................

Regards, RP
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Old 26th Apr 2007, 01:04
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Touche'
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Old 26th Apr 2007, 02:01
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The few times I've seen 'em - at Boeing Field in Seattle - they do the same delay prior to departure.
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Old 26th Apr 2007, 04:13
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Originally Posted by rhinoplasty
er, An-124/225 are in the 82000 range actually................

Regards, RP
Close enough.
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Old 26th Apr 2007, 04:13
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Those with long memories will recall the early TriStars with -22B engines did the same...initially.
Rather long run-ups at partial power prior to brakes release.
Early problems (big time) with the -22B's.
I recall seeing seven of these RR engines on the ramp on engine stands at MIA in 1974.
All, and I mean all the turbine blades were...ah, gone.
Must have been expensive
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Old 26th Apr 2007, 08:25
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I would have thought that with a 5- or 6-strong crew, they need all that time to complete the before take-off checklist
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Old 26th Apr 2007, 09:08
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I would have thought that with a 5- or 6-strong crew, they need all that time to complete the before take-off checklist
You mean, as in rollcall
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