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Who Came Up With This Three-engine Boeing 747-300?  
User currently offlineBobcat From United States of America, joined Jun 2007, 0 posts, RR: 0
Posted (13 years 10 months 2 days 14 hours ago) and read 4937 times:

Who came up with this three-engine Boeing 747-300?
Was it a hoax or did Boeing engineers actually toyed with
the idea?

5 replies: All unread, jump to last
User currently offlineFlyboy36y From United States of America, joined Mar 2000, 3039 posts, RR: 6
Reply 1, posted (13 years 10 months 2 days 14 hours ago) and read 4899 times:

I would think this is a hoax ONLY because:

1) The first 747's only had three or so windows on the upper deck.

2) This looks more like a 747-300 or 200. Those would have been designed after the Original 747 hit the marked and...

3) I don't think by then they would have wanted to change that much about it.

4) Also, such a configuration might make the plane a bit tail heavy, no?

5) It looks too much like (then) rival L-1011

User currently offlineCedarjet From United Kingdom, joined May 1999, 8653 posts, RR: 53
Reply 2, posted (13 years 10 months 2 days 12 hours ago) and read 4856 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.

fly Saha Air 707s daily from Tehran's downtown Mehrabad to Mashhad, Kish Island and Ahwaz
User currently offlineTurbotrent From Belgium, joined Jan 2002, 152 posts, RR: 2
Reply 3, posted (13 years 10 months 2 days 10 hours ago) and read 4790 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 :

Best regards,


Man's flight through life is sustained by the power of his knowledge.
User currently offlineMr. Mof From United States of America, joined May 2001, 41 posts, RR: 0
Reply 4, posted (13 years 10 months 2 days 9 hours ago) and read 4739 times:

The best of two worlds if it ever happened....the classic front of the 747 and the classic rear of the Tristar L10-11. It is always fun to wonder what if....

User currently offlineVgnAtl747 From United States of America, joined Apr 2001, 1536 posts, RR: 2
Reply 5, posted (13 years 10 months 2 days 9 hours ago) and read 4721 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.

Work Hard. Fly Right. Continental Airlines
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