747400sp
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How Wide Was The Boeing 7J7 Cabin?

Thu Dec 14, 2006 2:29 am

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.
 
william
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RE: How Wide Was The Boeing 7J7 Cabin?

Sat Dec 16, 2006 3:24 am

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
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RE: How Wide Was The Boeing 7J7 Cabin?

Sat Dec 16, 2006 4:25 am



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

http://i14.tinypic.com/2r27x54.jpg



2H4


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HAWK21M
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RE: How Wide Was The Boeing 7J7 Cabin?

Sat Dec 16, 2006 5:10 pm

Why a Pusher prop fan at that time.Was it a first technologywise.Any reason why it did not go ahead.
regds
MEL
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jetjack74
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RE: How Wide Was The Boeing 7J7 Cabin?

Sat Dec 30, 2006 3:31 pm

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
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Stitch
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RE: How Wide Was The Boeing 7J7 Cabin?

Sun Dec 31, 2006 8:39 am

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
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RE: How Wide Was The Boeing 7J7 Cabin?

Thu Jan 11, 2007 9:13 pm

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
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Clydenairways
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RE: How Wide Was The Boeing 7J7 Cabin?

Fri Jan 19, 2007 11:18 pm

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
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RE: How Wide Was The Boeing 7J7 Cabin?

Sat Jan 20, 2007 9:35 pm

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.
 
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Stitch
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RE: How Wide Was The Boeing 7J7 Cabin?

Sun Jan 21, 2007 4:40 am

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
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RE: How Wide Was The Boeing 7J7 Cabin?

Sat Jan 27, 2007 7:52 am

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.
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