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How Is Weight Removed From An Aircraft?  
User currently offlineAmerican 767 From United States of America, joined May 1999, 4640 posts, RR: 12
Posted (11 years 4 months 1 week 6 days 22 hours ago) and read 4043 times:

Hi everyone,
I imagine most of you folks have seen in the main forum the numerous posts about the roll out of the first Airbus A380 aircraft in Toulouse. I read an article about the roll out of the A380 and it said that the aircraft was slightly overweight, 1 ton or so. Airbus doesn't seem to be too concerned about this because they claim the aircraft will still be able to take off at or below MTOW, but they still have to lower the weight of the aircraft by 1 ton. The aircraft was 8000 lbs overweight and it is now less than 3000 lbs overweight. How do they remove weight?
Would they redesign the overall structure with lighter composite materials, to be applied to future units to come out, or would they just restrict pax/cargo and fuel capacity to be carried on board?

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Thanks in advance for your replies.

Ben Soriano
Brussels Belgium

Ben Soriano
5 replies: All unread, jump to last
User currently offlineSATL382G From , joined Dec 1969, posts, RR:
Reply 1, posted (11 years 4 months 1 week 6 days 20 hours ago) and read 3967 times:

1. Make sure all the vendors are meeting weight guarantees.

2. Make sure all customer supplied equipment meets weight guarantees.

3. Refine the structural analysis to see if all the structural weight is required.

4. If necessary renegotiate weight targets with customers and vendors to reduce weight of their equipment.

5. If all else fails eat the performance penalties.

3,4, & 5 are the expensive ones for an airframe manufacturer. 1 & 2 will have a greater impact on customers and vendors

User currently offlineLeanOfPeak From United States of America, joined Oct 2004, 509 posts, RR: 1
Reply 2, posted (11 years 4 months 1 week 6 days 18 hours ago) and read 3944 times:

All of SATL382G's responses are correct. You might also redesign with lighter materials.

But more often, there will be performance penalties. Airlines will pay less for the aircraft than was originally negotiated. One of the biggest things airlines buy based on is the payload-range diagram. Shifting the curve to 1 ton less payload at each range data point is a performance reassessment that would clearly be quantified as to how much that was worth to the airline in the original contract.

If the penalty costs less, the manufacturer pays the penalty. If the redesign should cost less, the manufacturer redesigns or leans on suppliers, provided it can do so and meet the required timeline.

User currently offlineDc10guy From United States of America, joined Feb 2000, 2685 posts, RR: 6
Reply 3, posted (11 years 4 months 1 week 6 days 4 hours ago) and read 3845 times:

Hopefully with a wrench. But a die grinder will work,

Next time try the old "dirty Sanchez" She'll love it !!!
User currently offlineKaiGywer From United States of America, joined Oct 2003, 12323 posts, RR: 32
Reply 4, posted (11 years 4 months 1 week 1 day 14 hours ago) and read 3656 times:

I've also heard Weight Watchers have meetings all the time  Nuts

“Once you have tasted flight, you will forever walk the earth with your eyes turned skyward, for there you have been, an
User currently offlineGreasespot From Canada, joined Apr 2004, 3104 posts, RR: 19
Reply 5, posted (11 years 4 months 1 week 1 day 12 hours ago) and read 3621 times:

Only install 3 engines....


Sometimes all you can do is look them in the eye and ask " how much did your mom drink when she was pregnant with you?"
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