A380 - 0 Building - 1

[EagleKeeper]

Looks like the 380 is to big for it's britches.

Link

Another example why many US airports reject it.

 

[The Boston Dangler]

The company also had to pull a military transport carrier A400M from a flight demonstration after problems were found in its gear box, the Journal reports.

no wonder it couldn't take off from a treadmill. is it front or rear wheel drive? what am i thinking? new european model, must be quattro or some shit.

 

[MotF Bane]

Building endlessly larger jets doesn't seem to be the way to go.

 

[Brovane]

That will buff right out.

 

[Oyeve]

We need to train pilots like they did decades ago like the guy who landed the plane in the hudson river. They just dont train pilots like that anymore.

 

[Spikesoldier]

ironic the embraer building took out airbus a380

 

[corwin]

Building endlessly larger jets doesn't seem to be the way to go.

Sadly Boeing sort of followed suit...they stretched out the 747 (calling it the 747-8) to add in 50+ more seats. Still not the monster the A380 is but still...it's debuting at the same airshow.

 

[LTC8K6]

We need to train pilots like they did decades ago like the guy who landed the plane in the hudson river. They just dont train pilots like that anymore.

It was being towed...

 

[Scotteq]

no wonder it couldn't take off from a treadmill. is it front or rear wheel drive? what am i thinking? new european model, must be quattro or some shit.

Not sure of this particular aircraft, but it's not uncommon for the intake fan of a (turbofan) jet engine to have a gearbox.

 

[Brovane]

It was being towed...

This. Probably also considering the size of the Airshow the Tarmac was probably fairly crowded with other planes. The A380 is a big plane to be moving around.

 

[coxmaster]

We need to train pilots like they did decades ago like the guy who landed the plane in the hudson river. They just dont train pilots like that anymore.

HAHA. Yeah, flight training is a joke now

And just FYI Sullenberger's training would have taught him not to land in the Hudson as the altitude and airspeed would have made it possible to return to LGA, just sayin

 

[ichy]

We need to train pilots like they did decades ago like the guy who landed the plane in the hudson river. They just dont train pilots like that anymore.

Huh? What in the world makes you say something like that? Modern simulator technology allows pilots to practice all sorts of emergencies that they could never safely recreate in a real airplane.

 

[The Boston Dangler]

Not sure of this particular aircraft, but it's not uncommon for the intake fan of a (turbofan) jet engine to have a gearbox.

iirc, they have air-driven (post-compressor) gearboxes for power take-off - hydraulics, electricity, etc. exactly what the article is describing is anyone's guess. "gear box"?

 

[coxmaster]

iirc, they have air-driven (post-compressor) gearboxes for power take-off - hydraulics, electricity, etc. exactly what the article is describing is anyone's guess. "gear box"?

The A400M has 4 engines, all of which are identical. Two on each side turn the prop clockwise while the other two turn the prop counter clockwise.

Since the engines themselves are identical obviously 2 of them have a gearbox to turn the prop in the opposite direction. No an uncommon thing when it comes to counter-rotating props.


Edit:
Pic for reference

 

[LTC8K6]

The A400M has 4 engines, all of which are identical. Two on each side turn the prop clockwise while the other two turn the prop counter clockwise.

Since the engines themselves are identical obviously 2 of them have a gearbox to turn the prop in the opposite direction. No an uncommon thing when it comes to counter-rotating props.


Edit:
Pic for reference

All 4 have gearboxes. They are turboprop engines. Gearboxes turn the props.

 

[The Boston Dangler]

a turboshaft will have gearboxes no matter what, unless you want to run props directly off the output shaft.

 

[coxmaster]

All 4 have gearboxes. They are turboprop engines. Gearboxes turn the props.

Doh, totally didnt even realize that they were turbo prop :thumbsup:

 

[Scotteq]

iirc, they have air-driven (post-compressor) gearboxes for power take-off - hydraulics, electricity, etc. exactly what the article is describing is anyone's guess. "gear box"?

Most commercial jets use Turbofans. On some Turbofan designs, it is necessary that the intake fan rotate at a different speed from the rest of the engine. Therefore a Gearbox is necessary to decouple the intake fan and provide a suitable ratio.

As bypass ratio increases, the mean radius ratio of the fan and LP turbine increases. Consequently, if the fan is to rotate at its optimum blade speed the LP turbine blading will spin slowly, so additional LPT stages will be required, to extract sufficient energy to drive the fan. Introducing a (planetary) reduction gearbox, with a suitable gear ratio, between the LP shaft and the fan enables both the fan and LP turbine to operate at their optimum speeds. Typical of this configuration are the long-established Honeywell TFE731, the Honeywell ALF 502/507, and the recent Pratt & Whitney PW1000G.

http://en.wikipedia.org/wiki/Turbofan


Edit:


http://en.wikipedia.org/wiki/Rolls-Royce_Trent_900

Rolls-Royce has seven risk and revenue sharing partners on the Trent 900: Industria de Turbo Propulsores (low pressure turbine), Hamilton Sundstrand (electronic engine controls), Avio S.p.A. (gearbox module), Marubeni Corporation (engine components), Volvo Aero (intermediate compressor case), Goodrich Corporation (fan casings and sensors) and Honeywell (pneumatic systems). In addition, Samsung Techwin, Kawasaki Heavy Industries and Ishikawajima-Harima Heavy Industries (IHI) are programme associates.

 

[GagHalfrunt]

Not a problem, there are no buildings in the sky.

 

[NikolaeVarius]

Not a problem, there are no buildings in the sky.

You forgot about heaven

 

[poncherelli2]

No commercial jets (save a few older 146s) have geared turbofan engines. The PW1000 will be the first major commercial engine program to to employ a gearbox decoupling the fan and LPT, and will power the A320neo and Bombardier CSeries (and the MRJ and MS21).

The gearbox you referenced on the Trent 900 is an accessory gearbox and is a relatively minor component.

Most commercial jets use Turbofans. On some Turbofan designs, it is necessary that the intake fan rotate at a different speed from the rest of the engine. Therefore a Gearbox is necessary to decouple the intake fan and provide a suitable ratio.




http://en.wikipedia.org/wiki/Turbofan


Edit:


http://en.wikipedia.org/wiki/Rolls-Royce_Trent_900

 

[skyking]

Another common aviation usage of "gearbox" refers to the structures in the aircraft around the main landing gear. I doubt that is the case this time, however.

 

[MarkXIX]

Sadly Boeing sort of followed suit...they stretched out the 747 (calling it the 747-8) to add in 50+ more seats. Still not the monster the A380 is but still...it's debuting at the same airshow.

Yes, but they built it on a platform that's been around forever now and that airports don't have to modify themselves for. Airbus would have been smart to design the A380 to meet the same airport requirements that the already existing 747 required.

 

[theeedude]

Korean Air Lines pilots can't fly. I think I'd rather fly Aeroflot.

 

[The Boston Dangler]

Korean Air Lines pilots can't fly. I think I'd rather fly Aeroflot.

with the goats?