TheBigOne From United Kingdom, joined Sep 2004, 240 posts, RR: 0 Posted (9 years 11 months 5 days ago) and read 16104 times:
Returning to LHR from PHL on a BA 777 this week, the PTV 'airshow' indicated the aircraft's altitude as 43,000ft. This is the highest altitude that an aircraft I've been on has reached. Has anyone been on a regular commercial service (excluding Concorde), where the aircraft has flown higher than this?
Reach for the stars - they are closer than you think!
KDTWFlyer From United States of America, joined Jun 2004, 828 posts, RR: 1
Reply 6, posted (9 years 11 months 4 days 21 hours ago) and read 15997 times:
I know the certified ceiling on the 747-400 is 45,000ft. and assume at times they have flown that high, which would be awesome. Hop in a Citation X, Learjet 45, or Gulfstream V etc., you could cruise around at 51,000ft. however, the time of useful consciousness at that altitude is probably around 5-6 seconds during sudden decompression so it wouldn't be the safest of ideas. I believe 747SP's routinely flew above 40,000ft. but I'm not certain about that.
This photo is exaggerated because of the wide angle lens that was used to take it but it is still cool...
StudentFlyer From Australia, joined Sep 2004, 688 posts, RR: 3
Reply 9, posted (9 years 11 months 4 days 17 hours ago) and read 15971 times:
I think it depends on the Flight plan, and also based on the calculations of the fuel. Usually, a plane, when it has just taken off, it will cruise at a lower altitude, then as the fuel gets less, which translates to less weight, it will go higher. But the captain does have a decision, e.g on emergencies. But most of the time, it depends on the airway used during planning
Philsquares From , joined Dec 1969, posts, RR:
Reply 13, posted (9 years 11 months 1 day 15 hours ago) and read 15879 times:
The ceiling for the 747/747-400 is 45100. The limit is the ability of the aircraft to make an emergency descent in 4 minutes or less. In fact, if I remember correctly all 75/76/777 are also 45100.
As far as selecting the flight level, ultimately, it's up to the captain. However, the flight plans are normally run to get you the optimum flight level. Plus, the FMS also provides optimum and max flight level for the given weight and temp. On the 400, ideally, you want to fly +-2000 feet of your optimum flight level.
Andz From South Africa, joined Feb 2004, 8451 posts, RR: 10
Reply 19, posted (9 years 10 months 3 weeks 4 hours ago) and read 15704 times:
Got to FL410 on a SAA 747SP on a flight from JNB (elevation 5,577ft) to DUR (elevation 25ft) and the flight time was less than an hour! Had a jump seat directly behind the captain and feeling that thing climb was awesome.
After Monday and Tuesday even the calendar says WTF...