BoomBoom
Topic Author
Posts: 2459
Joined: Fri Nov 04, 2005 2:26 am

787 Strives To Shed Pounds

Fri Nov 18, 2005 12:26 am

New 787 goes on diet

Quote:
A binge of design tweaks this fall had triggered a rapid weight gain. Just a month ago, Boeing was 5,800 pounds over its target weight of 222,000 pounds for the base version 787-8

Within the past fortnight, the airplane went on a diet and shed a dramatic 2,500 pounds.

"It was no single big thing," she said, "There were a lot of 1- and 2- and 10-pound savings."

http://seattletimes.nwsource.com/htm...aerospace/2002628489_boeing17.html

[Edited 2005-11-17 16:31:32]
Our eyes are open, our eyes are open--wide, wide, wide...
 
JetMaster
Posts: 583
Joined: Tue Sep 27, 2005 7:46 am

RE: 787 Strives To Shed Pounds

Fri Nov 18, 2005 12:29 am

The link isn't the right one...

Anyways, no surprise a new design involves the need for weight savings during development. It will work out fine in the end.


Regards,
JM
The Journey is my Destination
 
pavlin
Posts: 391
Joined: Sun Oct 23, 2005 5:34 am

RE: 787 Strives To Shed Pounds

Fri Nov 18, 2005 12:29 am

Are you sure? Isn't a bit to early to weight a plane that hasn't even been built?
 
BoomBoom
Topic Author
Posts: 2459
Joined: Fri Nov 04, 2005 2:26 am

RE: 787 Strives To Shed Pounds

Fri Nov 18, 2005 12:37 am

Quoting JetMaster (Reply 1):
The link isn't the right one...

Thanks, I fixed the link.

There are actually two stories in one article. The other concerned doubling production of the 787. I created another thread on that topic in an attempt to keep the discussion focused.
Our eyes are open, our eyes are open--wide, wide, wide...
 
luisca
Posts: 1530
Joined: Thu Aug 16, 2001 11:37 am

RE: 787 Strives To Shed Pounds

Fri Nov 18, 2005 12:38 am

Quoting Pavlin (Reply 2):
Are you sure? Isn't a bit to early to weight a plane that hasn't even been built?

From what I understand, with CATIA (Boeing's computer CAD type design program) you can predict the weight of the airframe. I remember they had the same problem with the 777-200. In the design room their was a billboard with days left till initial assembly and pounds left to shed. Very funny actually. In the end they exceeded the weight target.

Its all in a series of videos about the 777 design process called 21st century jet. Unfortunately I don't have a VCR and I am sure it is not on DVD.
If it ain't Boeing (or Embraer ;-)) I ain't Going!
 
roseflyer
Posts: 9606
Joined: Fri Feb 13, 2004 9:34 am

RE: 787 Strives To Shed Pounds

Fri Nov 18, 2005 12:49 am

Quoting Pavlin (Reply 2):
Are you sure? Isn't a bit to early to weight a plane that hasn't even been built?

If they didn't have any issues about needing to keep the weight down, then the target would have been too high. It doesn't take until the plane is built for weight considerations to be made. Boeing probably knows more accurately the weight of all components going on the plane now since most of the designs are getting finalized. If there weren't any concerns, then the projected figure would have been too high since it should be a goal to pick to lowest achievable goal. Now McDonnell Douglas on the other hand with the MD-11 went beyond the lower limit in its projection and ended up with a design that failed to meet specifications. While it is too early for us to be certain of the performance characteristic of the 787, there should be no surprises in engineering if things are done correctly.
If you have never designed an airplane part before, let the real designers do the work!