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American 767
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How Is Weight Removed From An Aircraft?

Tue Jan 18, 2005 10:49 pm

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
 
SATL382G
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Joined: Sat Aug 14, 2004 12:02 am

RE: How Is Weight Removed From An Aircraft?

Wed Jan 19, 2005 12:50 am

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
"There’s nothing quite as exhilarating as being shot at and missed" --Winston Churchill
 
LeanOfPeak
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RE: How Is Weight Removed From An Aircraft?

Wed Jan 19, 2005 2:32 am

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.
 
DC10GUY
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RE: How Is Weight Removed From An Aircraft?

Wed Jan 19, 2005 3:59 pm

Hopefully with a wrench. But a die grinder will work,
Next time try the old "dirty Sanchez" She'll love it !!!
 
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KaiGywer
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RE: How Is Weight Removed From An Aircraft?

Mon Jan 24, 2005 6:27 am

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
 
greasespot
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RE: How Is Weight Removed From An Aircraft?

Mon Jan 24, 2005 8:35 am

Only install 3 engines....

GS
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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