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MAX Cruising Alititude  
User currently offlineBoeing777311 From United States of America, joined Mar 2001, 126 posts, RR: 0
Posted (11 years 10 months 2 hours ago) and read 5896 times:

What is the max cruising altitude of a plane with out a pressureizd cabin?

Also what are some aircrafts (civil and military) max altitudes?

thanks

13 replies: All unread, jump to last
 
User currently offlineTimz From United States of America, joined Sep 1999, 6902 posts, RR: 7
Reply 1, posted (11 years 10 months 1 hour ago) and read 5869 times:

If you mean, max altitude to carry paying passengers, must be 10000 ft? Or maybe less?

Or is that just a US rule? Maybe they waive it at La Paz anyway.


User currently offlineHmmmm... From Canada, joined May 1999, 2109 posts, RR: 5
Reply 2, posted (11 years 10 months 1 hour ago) and read 5864 times:

Canadian air regulations stipulate that, in Canada, no person shall fly an unpressurized aircraft between 10,000 and 13,000 ft. ASL for more than 30 minutes unless there is, available to each person, an oxygen mask and a supply of oxygen, nor shall anyone fly an unpressurized aircraft, for any amount of time over 13,000 ft., unless there is an oxygen mask and a supply of oxygen available for each person.

Those are the legal limits, but that also gives you a good idea of what the practical limits are.




An optimist robs himself of the joy of being pleasantly surprised
User currently offlineTimz From United States of America, joined Sep 1999, 6902 posts, RR: 7
Reply 3, posted (11 years 10 months ago) and read 5840 times:

Does anybody know an airline that uses oxygen masks routinely?

User currently offlineHmmmm... From Canada, joined May 1999, 2109 posts, RR: 5
Reply 4, posted (11 years 10 months ago) and read 5834 times:

Read the question again. He asked about an unpressurized plane.


An optimist robs himself of the joy of being pleasantly surprised
User currently offlineCatpac From Australia, joined Mar 2001, 236 posts, RR: 0
Reply 5, posted (11 years 9 months 4 weeks 1 day 16 hours ago) and read 5784 times:

A large jet (A340, B747) around 35,000ft-40,000
Smaller jets (B737, A320) prefer around 30,000ft-35,000ft
executive jets (Citation, Learjet) prefer above 40,000ft

Concorde loves altitudes of about 55,000ft

Blackbird often reaches up to 80,000ft and a speed of Mach 3.0

these altitudes are averages, but at the end of the day it depends oh how long the route is and the weight of the aircraft, etc...but this should give you a rough idea of who flies where.

Hope this helps
Mike


User currently offlineA350-200 From France, joined Oct 2000, 150 posts, RR: 1
Reply 6, posted (11 years 9 months 4 weeks 1 day 16 hours ago) and read 5767 times:

This is about UNpressurized flights

User currently offlineMxCtrlr From United States of America, joined Nov 2001, 2485 posts, RR: 35
Reply 7, posted (11 years 9 months 4 weeks 1 day 15 hours ago) and read 5756 times:

According to the B-727 MEL (Minimum Equipment List, for those who don't know), an operate may operate a B-727 unpressurized but must limit altitude to 10,000 feet.

MxCtrlr  Smile/happy/getting dizzy
Freight Dogs Anonymous - O.O.T.S.K.  Smokin cool



DAMN! This SUCKS! I just had to go to the next higher age bracket in my profile! :-(
User currently offlineKay From France, joined Mar 2002, 1884 posts, RR: 3
Reply 8, posted (11 years 9 months 4 weeks 1 day 12 hours ago) and read 5695 times:

Scientifically, 12,500ft is the max altitude after which oxygen lacks. More than 30 minutes up there and one suffers hypoxia and other lack-of-oxygen related symptoms.
Very dangerous. You can become unconscious.
"Hmmmmm", 10,000ft is the legal limit in Canada, but not the practical limit! I spend quite some time around that altitude with a max of 10,500ft in the 172.

kay


User currently offlineCx flyboy From Hong Kong, joined Dec 1999, 6639 posts, RR: 55
Reply 9, posted (11 years 9 months 4 weeks 1 day 11 hours ago) and read 5682 times:

You can fly up to max. alt of the aircraft unpressurized, it's just that you need oxygen masks on. Being unpressurised does not limit max alt.

User currently offlineRadarbeam From Canada, joined Mar 2002, 1310 posts, RR: 4
Reply 10, posted (11 years 9 months 4 weeks 1 day 11 hours ago) and read 5668 times:

The truth is that hypoxia can start at different levels depending on the person and other factors, such as the time of the day. For example during day time one could become hypoxic at 7,000ft or 8,000ft if the person is in bad physical condition or if the person is a smoker. And during night time assuming the person is in good health condition (non-smoker) hypoxia could start as low as 5,000ft.

User currently offlineGalaxy5 From United States of America, joined Mar 2000, 2034 posts, RR: 24
Reply 11, posted (11 years 9 months 4 weeks 1 day 10 hours ago) and read 5648 times:

in the US ( military to be specific ) the max alt without supplemental oxygen requirements is 10,000 feet.


"damn, I didnt know prince could Ball like that" - Charlie Murphy
User currently offlineDufo From Slovenia, joined May 1999, 810 posts, RR: 4
Reply 12, posted (11 years 9 months 4 weeks 1 day 10 hours ago) and read 5641 times:

The highest I have been with a C172 was 13500ft (for about 5 minutes). Simple mental tests worked just fine even up there  Smile


Regards,
Jernej



I seriously think I just creamed my pants without any influence from any outside variables.
User currently offlineHmmmm... From Canada, joined May 1999, 2109 posts, RR: 5
Reply 13, posted (11 years 9 months 4 weeks 1 day 9 hours ago) and read 5628 times:


Hmmmmm", 10,000ft is the legal limit in Canada, but not the practical limit! I spend quite some time around that altitude with a max of 10,500ft in the 172.M

You are incorrect, the legal limit in Canada is not 10,000 ft. You did not bother to read my post. Nor have you bothered to read the Canadian Aviation Regulations before posting about this issue.

The legal limit is 13,000 ft. for 0 minutes without oxygen as described. Then it is anywhere between 10,000 to 13,000 ft. for a max of 30 minutes without oxygen as described. Reference CAR 605.31



An optimist robs himself of the joy of being pleasantly surprised
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