A380900 From France, joined Dec 2003, 1091 posts, RR: 1 Posted (10 years 4 months 6 days 6 hours ago) and read 3348 times:
I trust people at Airbus to know what they're doing but it seems odd that a 562 tons A380 would have 4 70000lbs engines whereas the 363 tons A340-600 has 4 56000lbs engines.The total thrust of the A380 is 280000lbs and the 777-300ER 230000lbs.
Is the A380 going to be a slow climber like the first generation a340?
Ka From Switzerland, joined Apr 2000, 655 posts, RR: 10
Reply 7, posted (10 years 4 months 6 days 5 hours ago) and read 2877 times:
Airbus already announced that the A380 will be reaching faster than its closest competitor (B744) its initial cruising altitude, which will be higher than its competitor´s.
This is all calculated in numerous test and checked in windtunnels. Usually these calculations are very accurate (within a 2% margin).
And, yes, due to the necessary ability of any aircraft to takeoff with one engine failing all twin engine a/c are overpowered in normal operation.
Longhaulheavy From United States of America, joined Dec 2003, 402 posts, RR: 2
Reply 9, posted (10 years 4 months 6 days 2 hours ago) and read 2417 times:
I don't really care about slow climbing although I care about climbing!
I would think this concern over slow climbing is legitimate, because isn't it true that some airports want you up and out faster than others? (per agreements with residential areas close to airports...)
MD80Nut From United States of America, joined Jul 2003, 889 posts, RR: 9
Reply 10, posted (10 years 4 months 6 days 1 hour ago) and read 2316 times:
Wouldn't it be a better idea to wait until the A380 actually flies before worrying about it's rate of climb? Like Kingsford said, I'm sure Airbus will know before the first flight.
Now please correct me if I'm wrong, but I haven't heard about any incident or accident caused by the A340-200/300's supposedly slow rate of climb. If someone can point out an incident or accident were this was a factor I would appreciate it.
Dw747400 From United States of America, joined Aug 2001, 1254 posts, RR: 1
Reply 11, posted (10 years 4 months 6 days 1 hour ago) and read 2285 times:
As discussed before, increased climb performance has a number of benefits, but also has tradeoffs, like most things in aviation. If you climb faster, you can get to a more efficient altitude faster, and get over the more congested air routes faster, hopefully allowing you to take a more direct route. At the same time, bigger engines and wings add weight and drag.
The A380 has an enormous wing, and I think that this will contribute to its climb performance. Additionally, though its thrust to weight ratio is smaller than that of a 747-400 for example, its wing is much larger... 60% larger, for a 40% increase in takeoff weight. That should provide a significant amount of extra lift.