24-03-2006, 02:50 AM
While the weight for a HEAVY used to be 300K, it has been reduced. The current weight catagories are:
HEAVY: Aircraft capable of takeoff weights of 255,000 pounds or more whether or not they are operating at this weight during a particular phase of flight.
LARGE: Aircraft that are more than 41,000 pounds maximum certified takeoff weight, up to 255,000 pounds.
SMALL: Aircraft of 41,000 pounds or less maximum takeoff weight.
This is for the purposes of wake turbulence separation. From here there are pages of rules and guidlines on how to apply those rules for both
terminal and enroute. As with all rules worth their salt there is an exception: the Boeing 757 is classed as a heavy in most cases or listed
specifically. There is also the sub-catagory of SMALL+ which is used for aircraft of more than 12,500 operating within Class B airspace.
HEAVY: Aircraft capable of takeoff weights of 255,000 pounds or more whether or not they are operating at this weight during a particular phase of flight.
LARGE: Aircraft that are more than 41,000 pounds maximum certified takeoff weight, up to 255,000 pounds.
SMALL: Aircraft of 41,000 pounds or less maximum takeoff weight.
This is for the purposes of wake turbulence separation. From here there are pages of rules and guidlines on how to apply those rules for both
terminal and enroute. As with all rules worth their salt there is an exception: the Boeing 757 is classed as a heavy in most cases or listed
specifically. There is also the sub-catagory of SMALL+ which is used for aircraft of more than 12,500 operating within Class B airspace.
Controllers do it best, just ask a pilots wife!
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