Quoting Gigneil (Reply 20):
*
* The A340-600X uses a higher proportion of composites. It is lighter than if you had just bulked up the previous airframe to that MTOW linearly. |

Saying "light structure" is quite misleading here, because it

IS 5 tons heavier. One could call it a more efficient structure, if you will

Standard version MTOW/OEW ratio: 368/177 = 2.08

HGW version MTOW/OEW ratio: 380/182 = 2.09

Hence the HGW is structure-wise exactly 0.49% more efficient. Not really impressing but ok ... still better than nothing.

Did you think of the mere 12t/5t ratio which is 2.4? Well, just the structural cannot fly ... you need to compare whole airplanes.

cheers,

Jan