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Altitude And Airspeed Questions  
User currently offlineSkywatch From United States of America, joined Mar 2005, 923 posts, RR: 5
Posted (7 years 10 months 13 hours ago) and read 3425 times:

Ok, the standard rule in US airspace is 250kts or less below 10,000 feet, right?

---Is that 10,000 ft rule MSL or AGL? Say you have some high airport, maybe 7,000 MSL. After climbing 3000 ft, could you accelerate to cruising speed?

That's been bothering me for a while. Thanks in advance!

---Skywatch


------Forever Watchin' The Sky------
13 replies: All unread, jump to last
 
User currently offlineRedcordes From United States of America, joined Jan 2006, 245 posts, RR: 0
Reply 1, posted (7 years 10 months 10 hours ago) and read 3417 times:

10,000 MSL. Yes you could accelerate to cruise if ATC accepts and no othe restrictions.


"The only source of knowledge is experience." A. Einstein "Science w/o religion is lame. Religion w/o science is blind."
User currently offlineSlamClick From United States of America, joined Nov 2003, 10062 posts, RR: 68
Reply 2, posted (7 years 10 months 7 hours ago) and read 3393 times:

Quoting Skywatch (Thread starter):
could you accelerate to cruising speed?

Actually you can accelerate to normal cruising speed AT ten thousand feet. The restriction is below, in other words, it excludes ten thousand. I've done a few short routes in jet and we'd climb to ten thousand, level off, then accelerate to a speed often just below the barber pole. I've exceeded 250 any number of times within maybe three thousand feet of the ground.



Happiness is not seeing another trite Ste. Maarten photo all week long.
User currently offlineJustplanecrazy From United Kingdom, joined Nov 2003, 536 posts, RR: 2
Reply 3, posted (7 years 9 months 3 weeks 3 days 8 hours ago) and read 3234 times:

if there is a 250 knt speed restriction below 10,000 feet then why on the ITVV B737 Stansted-Lisbon video is the pilot flying at 275 IAS at 8,000 feet?


your pilots today on this 747 flight are captain oliver hardy and assisting will be FO stan laurel.Have a safe flight
User currently offlineSlamClick From United States of America, joined Nov 2003, 10062 posts, RR: 68
Reply 4, posted (7 years 9 months 3 weeks 3 days 8 hours ago) and read 3228 times:

Quoting Justplanecrazy (Reply 3):

Well, the rule I refer to us just the US FARs.

For the flight you ask about, maybe someone who operates under those rules can comment.



Happiness is not seeing another trite Ste. Maarten photo all week long.
User currently offlineCosmicCruiser From United States of America, joined Feb 2005, 2254 posts, RR: 16
Reply 5, posted (7 years 9 months 3 weeks 3 days 7 hours ago) and read 3219 times:

Quoting Justplanecrazy (Reply 3):
if there is a 250 knt speed restriction below 10,000 feet then why on the ITVV B737 Stansted-Lisbon video is the pilot flying at 275 IAS at 8,000 feet?

Simple, in a number of places in Europe, U.K. for sure and I've seen it in Gr. the controller will issue a "no speed restriction" clearance giving the crew the option of a high speed climb, or descent for that matter. Flying into CDG I've NEVER seen the option and in fact usually get slowed to 250 kts up around FL180! Departing CDG the SIDS state 250 below FL100 unless authorized by ATC. I departed there one night heavy and Vclean was 290kts and CDG dept. got a little irritated until I explained that was as slow as we could go then she just said "please tell me in the future". "OOOOOOKay"


User currently offlineSABE From Argentina, joined Jun 2005, 156 posts, RR: 0
Reply 6, posted (7 years 9 months 3 weeks 3 days 7 hours ago) and read 3212 times:

Quoting CosmicCruiser (Reply 5):
I departed there one night heavy and Vclean was 290kts

Wow! What were you flying? The Concorde?  Smile



TUS-DFW-EZE... can't wait to visit home again!
User currently offlineCosmicCruiser From United States of America, joined Feb 2005, 2254 posts, RR: 16
Reply 7, posted (7 years 9 months 3 weeks 3 days 3 hours ago) and read 3171 times:

Quoting SABE (Reply 6):
What were you flying?

No just an MD-11 at high gross wgt. Vclean is normally 287-289kts at high to max gross wgt.


User currently offlineSABE From Argentina, joined Jun 2005, 156 posts, RR: 0
Reply 8, posted (7 years 9 months 3 weeks 3 days 3 hours ago) and read 3166 times:

Wow! I didn't realize Vclean could be so high for passenger aircraft even at HGW. Learned something new, thanks CosmicCruiser!


TUS-DFW-EZE... can't wait to visit home again!
User currently offlineSuseJ772 From United States of America, joined Aug 2005, 794 posts, RR: 1
Reply 9, posted (7 years 9 months 2 weeks 3 days 1 hour ago) and read 3074 times:

Quoting CosmicCruiser (Reply 5):
Vclean was 290kts

What the heck is VClean?



Currently at PIE, requesting FWA >> >>
User currently offlineRedcordes From United States of America, joined Jan 2006, 245 posts, RR: 0
Reply 10, posted (7 years 9 months 2 weeks 3 days ago) and read 3058 times:

Minimum speed with flaps and gear up (clean config.).


"The only source of knowledge is experience." A. Einstein "Science w/o religion is lame. Religion w/o science is blind."
User currently offlineVmcg From Brazil, joined Jul 2006, 9 posts, RR: 0
Reply 11, posted (7 years 9 months 2 weeks 2 days 18 hours ago) and read 3036 times:

Quoting SuseJ772 (Reply 9):
What the heck is VClean?

That's my cousin  biggrin   Big grin

Quoting CosmicCruiser (Reply 7):
No just an MD-11 at high gross wgt. Vclean is normally 287-289kts at high to max gross wgt.

After a high weight takeoff on the MD-11 the pilot usually has to keep the slats extended until FL100, and only then accelerate to Vclean and retract the slats, unless ATC allows him to accelerate beyond 250kts at lower altitudes.


User currently offlinePhilSquares From , joined Dec 1969, posts, RR:
Reply 12, posted (7 years 9 months 2 weeks 2 days 15 hours ago) and read 3014 times:

Quoting CosmicCruiser (Reply 7):
No just an MD-11 at high gross wgt. Vclean is normally 287-289kts at high to max gross wgt.

The 744 is in the same range 287-289KIAS.


User currently offlineCosmicCruiser From United States of America, joined Feb 2005, 2254 posts, RR: 16
Reply 13, posted (7 years 9 months 2 weeks 1 day 18 hours ago) and read 2937 times:

Quoting Vmcg (Reply 11):
After a high weight takeoff on the MD-11 the pilot usually has to keep the slats extended until FL100, and only then accelerate to Vclean and retract the slats, unless ATC allows him to accelerate beyond 250kts at lower altitudes.

Perhaps you worded that a little wrong. We would advise dept. on the initial contact that we would be climbing at xxxkts (a very common situation in a heavy jet on a long leg and at most all int'l arpts it isn't a req'd call) and they already know or will accomodate you and then you clean up on schedule. Any prob will result in a small vector but keeping the slats out until fl100 would be the last thing I would want to do....CC


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