Just got some respite from real-life issues and took the chance to finish another of my long lasting FD scale WIPs.
Boeing 747X and Boeing 747X stretch.
This was Boeing's second proposal for a new version of the 747 made inbetween the 747-400 and the 747-8. It was announced in 2000 as a plan for three different passenger models; The 747-400X, the 747X and the 747X stretch.
The 747X featured a relofted wing with extra inboard section that extended the wingspan to 69,8m, larger winglets, modified and enlarged rudder and horizontal stabilizer surfaces. Newer more powerful and fuel-efficent engines provided by either Engine Alliance (GE+P&W) or Rolls-Royce added to the increased fuel capacity would have allowed to carry up to 430 passengers to a range of 16.100/16.300km. The Stretch variant increased the fuselage length by 6,3m (to a total of 80,5) to carry 500 passengers over a range of 14.500km. Freighter versions were also planned to be offered.
Ultimately, neither the 747X and 747X Stretch managed to garner enough interest to leave the design phase, the only exception being the 747-400X, which entered service as the 747-400ER (although with only six orders from Qantas).
As a little and quick extra, the 767-400ERX:
Around the same time Boeing was working on the 747X, a new longer range version of the 767-400 was offered as well: Powered by the same engines (EA and RR) it promised a range of at least 12.000km (some 1.600 more than the standard -400ER). This as well never reached the production phase.
almost forgot, sorry for lacking of the mentioned Rolls-Royce engine choice, but I've not found any schematics or informations about how the planned trent600 would have looked. More so, there were more than one planned Trent600, the first was supposed to power the MD-11 (then BA bought Caledonian and Air Europe folded, deleting customers that asked for that powerplant), the second was being designed for the 747X. So in case I might ever find something, it would still be possible that it is not the one I'm looking for, or worse, that there is no info to tell apart the two different types.