Cedarjet From , joined Dec 1969, posts, RR:
Reply 2, posted (11 years 7 months 2 weeks 2 days 14 hours ago) and read 3362 times:
I think this was real. It became the 747SP (74L in shorthand), Boeing were looking for ways to compete with the DC10 and L1011. The -300 designation makes sense as well (even if it was never used until the SUD a decade later), since the -200 was available as early as 1971.
Turbotrent From , joined Dec 1969, posts, RR:
Reply 3, posted (11 years 7 months 2 weeks 2 days 12 hours ago) and read 3296 times:
Cedarjet is right. It is real and it was meant to compete with the DC10 and the L1011. But after research it seemed less expensive to just shorten the 747 instead of giving it a whole new tail with the 3th engine. Here are a few more drawings from the engineers :
VgnAtl747 From , joined Dec 1969, posts, RR:
Reply 5, posted (11 years 7 months 2 weeks 2 days 10 hours ago) and read 3227 times:
This design was real. I was watching a history of the 747 show on Wings about a year ago, and this was actually a thought design. Another design had the upper deck strech the entire length of the aircraft (that design had the standard 4 engine configuration). Boeing couldn't make the full upper deck work because of the required spacing of emergency exits conflicting due to the size of the wing and overlapping of the exits.