American 767 From United States of America, joined May 1999, 4500 posts, RR: 12 Posted (10 years 8 months 3 weeks 2 days 11 hours ago) and read 3653 times:
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?
LeanOfPeak From United States of America, joined Oct 2004, 509 posts, RR: 1
Reply 2, posted (10 years 8 months 3 weeks 2 days 8 hours ago) and read 3554 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.