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How Wide Was The Boeing 7J7 Cabin?

747400sp From United States of America, joined Aug 2003, 3301 posts, RR: 2
Posted (6 years 5 months 1 week 5 days 8 hours ago) and read 11026 times:

The pro fan powered 7J7, witch Boeing was going to build as a 727 replacement, was supposed to be a wide body with a 2+2+2 lay out in coach. Here is my question is how wide was it cabin supposed to be.

10 replies: All unread, jump to last

William From United States of America, joined Jun 1999, 1138 posts, RR: 0
Reply 1, posted (6 years 5 months 1 week 3 days 7 hours ago) and read 10913 times:

If i recall it was a 767 like width. Would have been a best seller, even if they would have ditch the props and installed regular fans.

2H4 From United States of America, joined Oct 2004, 8950 posts, RR: 62
Reply 2, posted (6 years 5 months 1 week 3 days 6 hours ago) and read 10894 times:

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HEAD DATABASE EDITOR

Here's a picture, if it helps at all:

2H4

Intentionally Left Blank

HAWK21M From India, joined Jan 2001, 31201 posts, RR: 58
Reply 3, posted (6 years 5 months 1 week 2 days 18 hours ago) and read 10814 times:

Why a Pusher prop fan at that time.Was it a first technologywise.Any reason why it did not go ahead.
regds
MEL

Think of the brighter side!

Jetjack74 From United States of America, joined Jul 2003, 7336 posts, RR: 52
Reply 4, posted (6 years 4 months 3 weeks 4 days 19 hours ago) and read 10617 times:

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Quoting HAWK21M (Reply 3):
Why a Pusher prop fan at that time.Was it a first technologywise.Any reason why it did not go ahead.
regds

It was called an UDF or Unducted Fan Engine, It was also called the Ultra-high Bypass Fan, UHB. I was tested on a 727 and an MD80. It was a traversed prop that was supposed to cut fuel consumption by 35% and be less pollutant. It didn't take, as it was very noisy and the idea fizzled after awhile as Stage 2 and 3 noise regs were taking effect in future.
http://en.wikipedia.org/wiki/Propfan

Made from jets!

Stitch From United States of America, joined Jul 2005, 26713 posts, RR: 83
Reply 5, posted (6 years 4 months 3 weeks 4 days 2 hours ago) and read 10571 times:

Quoting 747400sp (Thread starter):
The pro fan powered 7J7, witch Boeing was going to build as a 727 replacement, was supposed to be a wide body with a 2+2+2 lay out in coach. Here is my question is how wide was it cabin supposed to be.

The information on Wikipedia about the 7J7's cabin width is incorrect. The plane would have been fitted with "traditional" 3+3 narrowbody seating.

Strathpeffer From United Kingdom, joined Jan 2007, 79 posts, RR: 0
Reply 6, posted (6 years 4 months 1 week 6 days 14 hours ago) and read 10381 times:

Quoting Stitch (Reply 5):
The plane would have been fitted with "traditional" 3+3 narrowbody seating.

Initially, certainly, the plan was to have 2-2-2 seating. This was confirmed in a UK documentary called "Reach For The Skies" broadcast in the very early nineties and in the first edition of the book "Modern Commercial Aircraft" by William Green and Gordon Swanborough.

PJ

Another Technical Problem?

Clydenairways From Ireland, joined Jan 2007, 999 posts, RR: 0
Reply 7, posted (6 years 4 months 5 days 11 hours ago) and read 10174 times:

I remember that it was going to be a twin isle aeroplane too.. It's a pity they didn't do further development to try and eliminate the initial problems with noise etc. With up and down Fuel costs and Emissions high on the agenda again these days , it could have been the future.
At the time, i didn't like the look of it, but i think it looks cool now.

The A340 was supposed to be powered by a SuperFan too, which i think was very similar, but with the fan at the front and covered by a type of cowling.

Scott0305 From United Kingdom, joined May 2005, 196 posts, RR: 0
Reply 8, posted (6 years 4 months 4 days 13 hours ago) and read 10108 times:

I certainly recall the talk of a wide-body but look at the artist's impression above. That's a 757 style nose if I ever saw one...with the flatter nose to fit the larger 767 flight deck...impling that the artist based this image on a standard 3+3 narrow-body.

Stitch From United States of America, joined Jul 2005, 26713 posts, RR: 83
Reply 9, posted (6 years 4 months 4 days 6 hours ago) and read 10053 times:

Maybe Boeing wanted to start with a dual-aisle plane, but realized that the extra structure weight wasn't worth it (and/or the engines couldn't provide sufficient thrust throughout the entire operating range) so they went with the narrower, 3+3 cabin shown in the illustration.

Liedetectors From United States of America, joined Jul 2005, 357 posts, RR: 0
Reply 10, posted (6 years 3 months 4 weeks 3 hours ago) and read 9902 times:

Quoting Jetjack74 (Reply 4):
It was a traversed prop that was supposed to cut fuel consumption by 35% and be less pollutant. It didn't take, as it was very noisy and the idea fizzled after awhile as Stage 2 and 3 noise regs were taking effect in future.

Also the tail structure would have had to been extremely tough in the event of a blade off situation, as there would have been no fan cowl to contain it.

If it was said by us, then it must be true.

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