Cruising at 800MPH

[Skuzzy]

Thought some of might get a kick out of this.

https://www.latimes.com/science/la-sci-sn-jet-stream-flight-20190219-story.html

What a tail wind!

[Puma44]

Going the other direction would be like the slow boat to China.

[Shuffler]

I had read that this morning. Quite a cruise speed.

[Drano]

Had a chopper fly by fast and low over the house last night. Didn't sound like one of the usual suspects so I brought up flightradar24 to see what it was. Turned out to be a medevac heading towards Baltimore. Saw a large airliner icon passing north of me so I checked it out. Was an A380 going from LAX to Paris at 37k....and 700 or so mph. So I kinda figured that was what was going on! Don't imagine any of the passengers get a fuel discount on that?hehe


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[Skuzzy]

Going the other direction would be like the slow boat to China.

I would hope the flight plan would route the plane away from the jet stream, in that case.  Hehe,..but it would be funny to watch.

[Wiley]

So it was supersonic.  Would it create a sonic boom?  Or is a sonic boom dependent on air speed not ground speed?

Wiley.

[Shuffler]

So it was supersonic.  Would it create a sonic boom?  Or is a sonic boom dependent on air speed not ground speed?

Wiley.

The plane was not supersonic airspeed. It had a very strong tail wind. The high speed given was ground speed, roughly plane airspeed plus tail wind speed.The airliner in question is not capable of supersonic flight.

[Wiley]

The plane was not supersonic airspeed. It had a very strong tail wind. The high speed given was ground speed, roughly plane airspeed plus tail wind speed.The airliner in question is not capable of supersonic flight.

So it's dependent on airspeed then.  Ok.

Wiley.

[Drano]

Yeah I think of that thing went supersonic there'd be a boom! Just another kind of boom!

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[Puma44]

I would hope the flight plan would route the plane away from the jet stream, in that case.  Hehe,..but it would be funny to watch.

Sometimes, that isn’t feasible but, the dispatchers do try and work around it.  Many times, Mother Nature is in a bad mood and not very cooperative.

[Skuzzy]

That's true.  Momma nature can be a biotch at times.

That jolt, when they entered the stream had to be a bit harrowing.

[Puma44]

Sometimes there’s a jolt of turbulence.  Other times, the ground speed indicator just starts increasing to abnormally high speed and it’s nice and smooth.

[Skuzzy]

Any chance of losing lift when entering a tail wind stream moving at that velocity?  Or is the approach to it such that the tail wind increases slow enough to allow the plane time to accelerate into it?

[Shuffler]

Any chance of losing lift when entering a tail wind stream moving at that velocity?  Or is the approach to it such that the tail wind increases slow enough to allow the plane time to accelerate into it?

At that alt I imagine the craft is moving at cruise. That speed minus the tail wind would have to be below stall.

[Oldman731]

Any chance of losing lift when entering a tail wind stream moving at that velocity?  Or is the approach to it such that the tail wind increases slow enough to allow the plane time to accelerate into it?

Never heard of wind shear in the flight levels.

Suppose it's possible.

- oldman