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An-124 in-flight upset after passing A380 led to 747 conflict
When ultra heavies get too close.... (www.flightglobal.com) Ещё...Sort type: [Top] [Newest]
At any altitude, wake turbulence is unpredictable in actual experience. Turbulence typically descends at a slow rate and moves with prevailing winds, so a crosswind could easily cause any turbulence from the higher altitude aircraft to move out of the path of a flight 1,000 ft exactly below. OTOH, with a high wind, a flight some 2 miles distant at 1,000 feet (or more) below could encounter wake turbulence from a heavy passing above. The real danger of wake turbulence is that it is unpredictable, and often unexpected when encountered.
that is a semi-confusing story but I guess I get the jist of it!
Larry, 1,000 feet is normal separation below FL 290 also for opposite flight paths. Jennifer, wake is still a problem, though rare, at high altitudes, as pointed out by the article.
An experienced (and not sleeping) ATC would have deconflicted this situation between the A380 & An-124 with momentary vectors.
dba74m mentions flying beneath a AN124 at close quarters...am I correct in thinking the rarified atmosphere at this altitude renders wake turbulence as a minor issue than that of a collision? I am aware of near misses during the stack or on approach at major airports...LHR/LGW/STN being an example of three majors in close proximity, surely the denser atmosphere at these lower levels renders turbulence a major risk especially when you find the largest beasts in the sky eyeballing each other!!
GEOFFREY THE NORMAL SEPARATION IS 2000FT, BUT ABOVE FL290 IS ONLY 1000FT IT´S CALLED R.V.S.M(REDUCED VERTICAL SEPARATION MINIMUM) THIS LINK CAN HELP YOU...http://www.faa.gov/about/office_org/headquarters_offices/ato/service_units/enroute/rvsm/