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A380 Underpowered?  
User currently offlineA380900 From France, joined Dec 2003, 1106 posts, RR: 1
Posted (10 years 7 months 2 weeks 6 days ago) and read 3387 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?

14 replies: All unread, jump to last
 
User currently offlineKlm-md11 From Greece, joined Mar 2002, 471 posts, RR: 1
Reply 1, posted (10 years 7 months 2 weeks 6 days ago) and read 3251 times:

here we go again...

this time the A380 in stead of the A340...


yaaaaaaaaaawhn.



GELUK IS GELUL MET EEN K
User currently offlineJkw777 From , joined Dec 1969, posts, RR:
Reply 2, posted (10 years 7 months 2 weeks 6 days ago) and read 3217 times:

I agree...  Sleepy

Who cares if its going to be a slow climber?  Insane

I feel that the A340 being a slow climber was part of its character...

Regards,

Justin  Big thumbs up



User currently offlineA380900 From France, joined Dec 2003, 1106 posts, RR: 1
Reply 3, posted (10 years 7 months 2 weeks 6 days ago) and read 3168 times:

Sorry to bore you guys but don't you think that the small difference in engine power is striking? I don't really care about slow climbing although I care about climbing!

User currently offlineKEESJE From , joined Dec 1969, posts, RR:
Reply 4, posted (10 years 7 months 2 weeks 6 days ago) and read 3160 times:

All aircraft have to be certified to do a one engine out take-off and climb after V1 in MTOW, in a bad weather , short runway situation.

Therefor B777, A330, B737 and A320 are "over powered" and 4 engine aircraft like 747, A340 etc underpowered...

As explained many many times before ... but won't prevent some simple mind suggesting it again in a few days ...


User currently offlineA380900 From France, joined Dec 2003, 1106 posts, RR: 1
Reply 5, posted (10 years 7 months 2 weeks 6 days ago) and read 3132 times:

Ok for the 777 but what about the A340-600?

User currently offlineKingsford From Belgium, joined Nov 2003, 427 posts, RR: 4
Reply 6, posted (10 years 7 months 2 weeks 5 days 23 hours ago) and read 3049 times:

A380-900, don't worry, if it doesn't climb, I think they will know before the first commercial flight ...  Laugh out loud

User currently offlineKa From Switzerland, joined Apr 2000, 660 posts, RR: 10
Reply 7, posted (10 years 7 months 2 weeks 5 days 23 hours ago) and read 2916 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.

KA.



Keep smiling - you might be on Radar!
User currently onlineEA CO AS From United States of America, joined Nov 2001, 13519 posts, RR: 62
Reply 8, posted (10 years 7 months 2 weeks 5 days 21 hours ago) and read 2654 times:
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As explained many many times before ... but won't prevent some simple mind suggesting it again in a few days

Keesje, get over yourself.  Insane

The guy was asking a legitimate question. It wasn't like he was Airbus-bashing; he just had a question about the A380's performance. There was no need to be rude.



"In this present crisis, government is not the solution to our problem - government IS the problem." - Ronald Reagan
User currently offlineLonghaulheavy From United States of America, joined Dec 2003, 402 posts, RR: 2
Reply 9, posted (10 years 7 months 2 weeks 5 days 20 hours ago) and read 2456 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...)


User currently offlineMD80Nut From United States of America, joined Jul 2003, 909 posts, RR: 9
Reply 10, posted (10 years 7 months 2 weeks 5 days 20 hours ago) and read 2355 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.

cheers, Ralph



Fly Douglas Jets DC-8 / DC-9 / DC-10 / MD80 / MD11 / MD90 / 717
User currently offlineDw747400 From United States of America, joined Aug 2001, 1257 posts, RR: 1
Reply 11, posted (10 years 7 months 2 weeks 5 days 20 hours ago) and read 2324 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.



CFI--Certfied Freakin Idiot
User currently offlineGreg From United Kingdom, joined May 2005, 0 posts, RR: 0
Reply 12, posted (10 years 7 months 2 weeks 5 days 20 hours ago) and read 2296 times:

It's not underpowered...it's overweight.
I'm sure Airbus will get it right before actualy delivery....


User currently offlineRuscoe From Australia, joined Aug 1999, 1546 posts, RR: 2
Reply 13, posted (10 years 7 months 2 weeks 5 days 20 hours ago) and read 2179 times:

I think this is a legitimate question because of guarantees Airbus have given about climb to height and field performance.

Overall the weight of the 380 will be up about 15 tonnes on takeoff, compared with original estimates, with the same engines, so one can legitimately ask about performance.

However. Airbus have said that the 380 will still meet its guarantees without more thrust.

Ruscoe


User currently offlineHeavierthanair From Switzerland, joined Oct 2000, 790 posts, RR: 0
Reply 14, posted (10 years 7 months 2 weeks 5 days 19 hours ago) and read 2047 times:

G'day

Getting it up slowly is one thing, staying up another thing altogether, the latter is far more important, endurance is what counts!  Innocent

Cheers

Peter



"Two things are infinite: the universe and human stupidity; and I'm not sure about the universe." (Albert Einstein, 1879
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