Heavy Callsign = >250 KIAS when below 10,000?
I've got a quick question about the well-known rule that more than 250 Knots below 10,000 feet (AGL or MSL? I'd guess MSL.) are a no-no. But I do know that there are exceptions to this rule.
So which ones are these? There are heavy airplanes (much fuel, heavy cargo -> near MTOW) that have a minimum flaps up speed of more than 250 Knots Indicated Airspeed. Does a pilot of such a heavy bird have to request a >250-clearance or is this automatically handled by appending 'heavy' to the flight number? Can a pilot of a lighter airplane request a higher speed as well if the airspace is clear in front of him?
Thanx controllers /knowers!
LH419 (FS2000 Pro Pilot)