FL100 Speed 250Kts

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1st September 2004 | 14:41

#1 (permalink)

CDB.A300

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Joined: Nov 2003

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From: 6th dimention

FL100 Speed 250Kts

Hello,

Any idea why speed reduction is usually set to FL100?

Trafic, Noise, Bird or something else?

Many Thanks.

1st September 2004 | 14:43

#2 (permalink)

PPRuNe Radar

Moderator

Joined: Jul 1997

Aviation Qualifications: PPL

Posts: 3,231

Likes: 21

From: Europe

Try a 'Search'.

Been covered many times before on PPRuNe

1st September 2004 | 18:43

#3 (permalink)

CDB.A300

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Joined: Nov 2003

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From: 6th dimention

Does'nt help me.
I did not find any answer.

Bye

1st September 2004 | 18:45

#4 (permalink)

catchup

Joined: Jun 2004

Posts: 507

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From: Vilha Abrao

325 kts!
What else? This bird is certified for that.

regards

1st September 2004 | 19:30

#5 (permalink)

BOAC

Per Ardua ad Astraeus

Joined: Mar 2000

Posts: 18,575

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From: UK

CDB.A300
When I put 'FL100 Speed 250Kts' in search I found exactly the answer!

1st September 2004 | 21:17

#6 (permalink)

xfeed

Joined: Apr 2003

Posts: 98

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From: s.e. england

I did the search as BOAC advised and read the responses. However, I was under the impression that 747's and 777's had 280 below FL100. Is this true?

Cheers!

2nd September 2004 | 07:57

#7 (permalink)

HEATHROW DIRECTOR

Joined: Oct 2000

Posts: 8,266

Likes: 1

From: Berkshire, UK

Is this confusion between SOPs and ATC requirements? I'm just guessing but 250kts below FL100 may be an national ATC-type restriction as one operates in busier airspace - TMAs, etc. However, I was never shy of saying "no ATC speed control" and saw many, many aircraft fly considerably faster than 250 below 100.