Sponsor Message:
Aviation Technical / Operations Forum
My Starred Topics | Profile | New Topic | Forum Index | Help | Search 
Altimeter 30.55  
User currently offlineGoboeing From United States of America, joined Jun 2000, 2683 posts, RR: 14
Posted (12 years 9 months 3 weeks 5 days 13 hours ago) and read 1065 times:

...and that's what this post is about. I was listening to my scanner on LGA approach yesterday and today and I heard the planes getting the altimeter for the approach. The altimeter setting was at hightest 30.55". Isn't that high? I've never even heard it past about 30.25 or so, and I thought for a minute that it was a squawk or something when the pilots were saying "three zero five five, roger".
Does anyone here know the extremes for the barometer that have been documented?

Nick

12 replies: All unread, jump to last
 
User currently offlineTimz From United States of America, joined Sep 1999, 6796 posts, RR: 7
Reply 1, posted (12 years 9 months 3 weeks 5 days 12 hours ago) and read 993 times:

Didn't it creep above 31 in Alaska a few winters back? Did that cause some? many? most? aircraft to be grounded until it dropped?

User currently onlineXFSUgimpLB41X From United States of America, joined Aug 2000, 4191 posts, RR: 37
Reply 2, posted (12 years 9 months 3 weeks 5 days 11 hours ago) and read 965 times:

A NOTAM will be issued if it drops below 28.00 and 32.00.. im quite sure those are the limits.


Chicks dig winglets.
User currently offlineL-188 From United States of America, joined Jul 1999, 29791 posts, RR: 58
Reply 3, posted (12 years 9 months 3 weeks 5 days 7 hours ago) and read 934 times:

That isn't an uncommon reading in the middle of winter. Especially if it is really really really cold out. Say when it is -30 or -40 out.


OBAMA-WORST PRESIDENT EVER....Even SKOORB would be better.
User currently offlineEGNV From United Kingdom, joined May 2001, 171 posts, RR: 0
Reply 4, posted (12 years 9 months 3 weeks 4 days 18 hours ago) and read 895 times:

Does anyone know what that is in european measurements?

I know that 29.92 is 1013...

That is a very high pressure reading. Is that the QNH?



User currently offlineChdmcmanus From United States of America, joined Mar 2001, 374 posts, RR: 2
Reply 5, posted (12 years 9 months 3 weeks 4 days 10 hours ago) and read 859 times:

30.55 is 1034mb
It was a strange setting for this time of year in the US northeast, especially when it was around 29.88 (1012mb) 2 days prior.

No, QNH is 18,000 msl in the US. (Mt. McKinley in Alaska I believe).

Regards,
ChD




"Never trust a clean Crew Chief"
User currently offlineDufo From Slovenia, joined May 1999, 798 posts, RR: 4
Reply 6, posted (12 years 9 months 3 weeks 4 days 4 hours ago) and read 849 times:

No wonder that we have FL035 and such stuff in Europe  Smile .. plus 'backtrack'!

Regards,
Jernej



I seriously think I just creamed my pants without any influence from any outside variables.
User currently offlineSkihigh2002 From United States of America, joined Jun 2000, 315 posts, RR: 0
Reply 7, posted (12 years 9 months 3 weeks 3 days 21 hours ago) and read 840 times:

What does QNH stand for?

Chris


User currently offlineUSAFHummer From United States of America, joined May 2000, 10685 posts, RR: 53
Reply 8, posted (12 years 9 months 3 weeks 1 day 18 hours ago) and read 800 times:

Mount McKinley (Denali) is 20,320 feet high, not 18,000...you may have been thinking of Mount St. Elias, which is 18,008 feet high, in Alaska...

What is QNH????

Greg



Chief A.net college football stadium self-pic guru
User currently offlineAirplay From , joined Dec 1969, posts, RR:
Reply 9, posted (12 years 9 months 3 weeks 1 day 18 hours ago) and read 800 times:

QNH is notation describing the altitude above sea level as opposed to QFE which is the altitude above the ground at the reporting station.

It has nothing to do with Mountains. 18,000 ASL is the transition altitude to standard altimeter setting in North America. Aircraft set the altimeter to 29.92 above this altitude. The transition altitude is different in other parts of the world.



User currently offlineAirplay From , joined Dec 1969, posts, RR:
Reply 10, posted (12 years 9 months 3 weeks 1 day 18 hours ago) and read 794 times:

P.S.

QFE=Question Field Elevation
QNH=Question Nill Height
QNE=Question Nill Elevation

QNE represents the transition altitude



User currently offlineSQ325 From Germany, joined Jul 2001, 1451 posts, RR: 7
Reply 11, posted (12 years 9 months 2 weeks 3 hours ago) and read 738 times:

QNH 1013 is a part of the ISA standard atmosphere.


User currently offlineTs-ior From Tunisia, joined Oct 2001, 3451 posts, RR: 6
Reply 12, posted (12 years 9 months 1 week 5 days 2 hours ago) and read 702 times:



Hy!!!

Notice that the highest QNH was registered in the
North Pole...it was 1080mbs...unbelievable,but true!!!


Top Of Page
Forum Index

Reply To This Topic Altimeter 30.55
Username:
No username? Sign up now!
Password: 


Forgot Password? Be reminded.
Remember me on this computer (uses cookies)
  • Tech/Ops related posts only!
  • Not Tech/Ops related? Use the other forums
  • No adverts of any kind. This includes web pages.
  • No hostile language or criticizing of others.
  • Do not post copyright protected material.
  • Use relevant and describing topics.
  • Check if your post already been discussed.
  • Check your spelling!
  • DETAILED RULES
Add Images Add SmiliesPosting Help

Please check your spelling (press "Check Spelling" above)


Similar topics:More similar topics...
30 Hour TAF posted Mon May 12 2008 20:57:38 by Futurecaptain
How Would A DC10 30 Strech To A 742 Length Perform posted Wed Jan 30 2008 09:05:08 by 747400sp
Su-30 Airbrake On A Civilian Aircraft? posted Thu Dec 27 2007 18:18:31 by Alessandro
"Broken" DC-10-30 posted Tue Sep 4 2007 19:07:16 by Fxfan
Altimeter Question For Pilots posted Fri Jun 8 2007 15:06:14 by Dougloid
TF-30 Nozzle Bypass Doors On F-111 posted Thu Apr 26 2007 07:32:34 by SCAT15F
DC-8-30 Icao Code posted Sat Apr 14 2007 00:04:54 by Ratherbflyin
Airbus Altimeter Question posted Sun Mar 25 2007 07:58:28 by CFTOA
Fadec Or EEC On DC-10-30? posted Sat Nov 11 2006 01:50:47 by MD11Fanatic
Single-color Nacelles: 30,000 Gal Per Year Saving posted Wed Oct 4 2006 20:12:38 by Keta

Sponsor Message:
Printer friendly format