From: ak336@cleveland.Freenet.Edu (John Dill) Organization: Case Western Reserve University, Cleveland, OH (USA) Date: 23 Jan 93 02:06:55 PST
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One of the sectors I work as a controller at Cleveland Center is a high (24,000' to 60,000') altitude sector over southern Michigan. This sector works a ton of inbound traffic to ORD, most of it from the east coast and New England areas. Our biggest task is to space two constant streams of a/c into one line before we hand them off to Chicago Center. This involves many speed adjustments and lots of vectors...though the patient controllers have found that speed changes are easier for both flight crews and con- trollers. The differing cruise speeds of our modern jet fleet require alot of conjoling and pleading with the pilots. In an American Airlines rush into ORD we have to space DC10's and B747's from JFK and Europe, with MD80's and Fokker 100's from New York State and New England. At any rate, I thouhgt you folks might be interested in the various cruise speeds of the different aircraft. (If given a choice, take the faster one, and put your wife on the slower one, so you can have a beer at the airport bar while awaiting her flight). B747, DC10, L1011, MD11....mach 83 to mach 85 B727, B767, A300, A320,....mach 80 to mach 82 DC9........................mach 78 to mach 80 MD80, B737.................mach 73 to mach 76 FK100....(get a life!).....mach 71 to mach 74 These speeds are of course up to the flight crew...I've had B737 pilots in a hurry go mach 80...but they burn fuel like mad. Our job is to get the fast guys to slow down and the slow ones to speed up...or suffer a vector off course for spacing. The one I'd pick is not on the list and doesn't fly into ORD anyway, but if you take the Concorde you'll be DRUNK when she gets there. John Dill -- Don't blame me.....I voted for Bush!