speed in class B

[The FNG]

Actually, CRJ200 Vmo is 330 to 8k...

Also, lest we confuse speed limit waivers, ATC CAN authorize speed greater than 200 but not to exceed 250 in C & D.

 

[ex208driver]

The speed restriction is for below 10,000' inside class b. I know Dallas class b goes 11,000'but at 10,000 you can go fast and begin accelerating above 250. In Houston they can waive this on the way out , they have the procedures and I am sure they will be implemented sometime soon about doing 250 below 10,000' when going into Houston when the traffic is light. The procedure has to be approved by the feds and then it will be published. They also know about the erj being limited to 250 below 8,000' and will say "when able no speed restirction". Also on a fed ride the faa inspecter had said they have been advised that atc was asking for pilots to go 201 to 250 under class b and this is a violation that they are enforcing . Also be aware of when you descend sometimes they will take you below class b and not tell you either. Just be aware and pay attention.

 

[WillyG]

Yes ATC can authorize speeds in excess of 250kts. I was flying in the Huston area last week near Contiental's hub and herd ATC say "no speed limit" when greeting multiple aircraft after checking in.

 

[ex208driver]

They leave you hanging up at 10,000' and expect you to slow when they descend you down. I have asked to go fast and also been told to delete the speed restriction coming in and they let stay up at 10,000' no big deal just a little faster descent rate to get down. Also talking about class b, beware at Chicago Midway on the descent to the northwest runways. Far enough out they pd you down below class b and not tell you. Also happens at Dallas Love field.

 

[FracPilot]

I have been told that waivers also exist for certain military aircraft (T-38) where keeping them below 250 might be unsafe because of the aircraft performance characteristics - although I do not know where that is published.

No waiver required. Far 91.117(d) states: If the minimum safe airspeed for any particular operation is greater than the maximum speed prescribed in this section, the aircraft may be operated at that minimum speed.


If 255 is minimum safe airspeed, it's legal. If 350 is minimum safe airspeed for your aircraft, it's legal to fly that speed. You ARE required to notify ATC of any deviation from the speed limits.

The T-38 will fly fine at 250. Some fighters/recon aircraft will not unless dirty.