Airspeed Restrictions

[charter dog]

Not that I know of any US Class B airspace out there that is entirely above 10,000' MSL, but if there was such airspace, there would be no 250 knot speed restriction.

The restriction isn't being in Class B, it's being below 10,000'.

I know it's picking nits, but....

-mini

Right!

Denver is the one I was thinking of. I believe the DEN class B tops out at 12,000' msl. Since there is no speed limit in class B airspace per se, this would be one class B area where there is no 250 KIAS restriction, at least within that portion of the airspace at or above 10,000' msl. The class Bs that top out at 10,000' msl have the restriction in place by virtue of the 250 KIAS below 10,000' msl rule. (Houston experiment aside)

Good call mini!

Best,

 

[rballty]

I believe there is a max airspeed of .83 Mach in RVSM airspace, from FL290 to FL410.

 

[minitour]

So...is it the "Class B" that's designated for an airport, or is it the "airspace underlying" that's designated for an airport?

Class B Airspace Designated for an Airport (ie the "ORD Class B" is set up for ORD). If you are under the shelf of the Class B airspace you're limited to 200KIAS.

Class B Airspace is set up for the busiest airports (one of the most restrictive airspaces) so ATC doesn't have to worry about the bugsmasher going through when they don't want 'em there, etc. So it is airspace designated for an airport (the ORD class B is set up for ORD).

-mini

 

[rtmcfi]

I believe there is a max airspeed of .83 Mach in RVSM airspace, from FL290 to FL410.

First time I have heard that one..... I think you should examine your beliefs!

 

[MauleSkinner]

Class B Airspace Designated for an Airport (ie the "ORD Class B" is set up for ORD). If you are under the shelf of the Class B airspace you're limited to 200KIAS.

Class B Airspace is set up for the busiest airports (one of the most restrictive airspaces) so ATC doesn't have to worry about the bugsmasher going through when they don't want 'em there, etc. So it is airspace designated for an airport (the ORD class B is set up for ORD).

-mini

Why do they have to say "designated for an airport"? Seems pretty redundant, since Class B is ONLY designated for an airport.

And why, then, don't they reference Class C or Class D that's "designated for an airport"? These simply say in Class C or D airspace within 4 miles of the primary airport.

Fly safe!

David

 

[minitour]

Why do they have to say "designated for an airport"? Seems pretty redundant, since Class B is ONLY designated for an airport.

And why, then, don't they reference Class C or Class D that's "designated for an airport"? These simply say in Class C or D airspace within 4 miles of the primary airport.

Fly safe!

David

If I knew....

-mini

 

[MauleSkinner]

If I knew....

-mini

...Just trying to find somebody that does

Fly safe!

David

 

[minitour]

...Just trying to find somebody that does

Fly safe!

David

Fantastic point, btw....just Class D or C....that's the FAA

-mini

 

[MauleSkinner]

Fantastic point, btw....just Class D or C....that's the FAA

-mini

Note also that paragraph (b) talks about Class B airspace WITHOUT the "designated for an airport" phrase. It's the same Class B...wonder what the difference is.

Fly safe!

David

 

[rtmcfi]

First time I have heard that one..... I think you should examine your beliefs!

I did a little examination myself.... That IS a manufacturers limit, on some airplanes. The number can vary... Has to do with the accuracy of pitot static systems at high speeds

 

[minitour]

I did a little examination myself.... That IS a manufacturers limit, on some airplanes. The number can vary... Has to do with the accuracy of pitot static systems at high speeds

The manufacturers limit on an airplane I frequently fly is like .0004...does that mean the speed restriction in class D is .0004?

-mini