Boeing set for ultimate 787 Dreamliner wing test on Sunday

mpenguin1

mpenguin1

Well-Known Member
28-March

Boeing intends to perform the ultimate wing test on the 787 Dreamliner on Sunday, program spokeswoman Lori Gunter confirmed Tuesday.

The test, which would take the wing of Boeing's 787 static-test airframe to 150 percent of the load it is expected to ever endure in service, is a key milestone for the program. It was a test at just above the 100 percent service load last year that uncovered a problem where the wing and fuselage meet, delaying first flight.

http://blog.seattlepi.com/aerospace/archives/199198.asp
 
Re: Boeing set for ultimate 787 Dreamliner wing test on Sund

Are they webcasting this one? I love those tests!
 
Re: Boeing set for ultimate 787 Dreamliner wing test on Sund

Expect them to spin the results of just over 150% to imply that it is very strong, rather than just barely meeting the certification requirements~
 
Re: Boeing set for ultimate 787 Dreamliner wing test on Sund

seagull said:
Expect them to spin the results of just over 150% to imply that it is very strong, rather than just barely meeting the certification requirements~
Click to expand...

Why should they want it to go significantly beyond 150%? Above and beyond is nothing but wasted weight, which comes out of payload.
 
Re: Boeing set for ultimate 787 Dreamliner wing test on Sund

KSCessnaDriver said:
Why should they want it to go significantly beyond 150%? Above and beyond is nothing but wasted weight, which comes out of payload.
Click to expand...

Exactly, I'm sure they could make a 172 that cold withstand 8g's...of course it would be a useless airplane.
 
Re: Boeing set for ultimate 787 Dreamliner wing test on Sund

mikecweb said:
Why?
Click to expand...

Because it's something they typically do before first flight. The first time they tried the stress test it failed.

So seeing as it failed the first time, one might think they have re-tested before first flight!
 
Re: Boeing set for ultimate 787 Dreamliner wing test on Sund

Maximillian_Jenius said:
Because it's something they typically do before first flight. The first time they tried the stress test it failed.

So seeing as it failed the first time, one might think they have re-tested before first flight!
Click to expand...

Yeah but if they are testing other components not involving the ultimate wing test then what's the difference. The first 3 airframes are only for testing. If modifications are needed they can make them. No reason for anymore delay.
 
Re: Boeing set for ultimate 787 Dreamliner wing test on Sund

KSCessnaDriver said:
Why should they want it to go significantly beyond 150%? Above and beyond is nothing but wasted weight, which comes out of payload.
Click to expand...

Didn't say they would, just saying that they try to spin that like it is an impressive amount of strength, as they did with the 777. It's not. It is an impressive feat to cut it so close to the minimum standard that they don't have an ounce more structural weight than required, but it is not impressively strong, which is what their PR attempts to say each time.
 
seagull said:
Didn't say they would, just saying that they try to spin that like it is an impressive amount of strength, as they did with the 777. It's not. It is an impressive feat to cut it so close to the minimum standard that they don't have an ounce more structural weight than required, but it is not impressively strong, which is what their PR attempts to say each time.
Click to expand...

Out of curiosity, have there been some transport category airplanes that have exceeded 150% by a large margin?

The only one I've ever seen is the 777 one because like most other people, I simply found it on youtube or on TV.

Just wondered if Airbus or MD ever had one go way past 160, 170% etc.
 
Re: Boeing set for ultimate 787 Dreamliner wing test on Sund

Nick said:
Out of curiosity, have there been some transport category airplanes that have exceeded 150% by a large margin?

The only one I've ever seen is the 777 one because like most other people, I simply found it on youtube or on TV.

Just wondered if Airbus or MD ever had one go way past 160, 170% etc.
Click to expand...

Yes, some have been more in the range of 250%.
 
Boeing Completes Ultimate-Load Wing Test on 787

March 28 /PRNewswire-FirstCall/ -- Boeing (NYSE:BA - News) today completed the ultimate-load wing up-bending test on the 787 Dreamliner static test unit.

During the testing, loads were applied to the airframe to replicate 150 percent of the most extreme forces the airplane is ever expected to experience while in service. The wings were flexed upward by approximately 25 feet (7.6 meters) during the test.

The initial results of the ultimate-load test are positive. More extensive analysis and review are required before the test can be deemed a success.


http://finance.yahoo.com/news/Boeing-Completes-UltimateLoad-prnews-4233272192.html?x=0&.v=1
 
Re: Boeing set for ultimate 787 Dreamliner wing test on Sund

I am ready for this airplane to get into service, I hate that it is probably going to replace the 767 eventually though. Hopefully the 767s will stick around for a good while longer. I am pretty sure the first versions they are making are going to be domestic range aircraft anyways so this will keep the 767 in business a while longer.

I am glad the 787 passed its structure test.
 
Re: Boeing set for ultimate 787 Dreamliner wing test on Sund

Muff3n said:
I am pretty sure the first versions they are making are going to be domestic range aircraft anyways so this will keep the 767 in business a while longer.
Click to expand...

Just the opposite. At Delta, expect the only domestic flights on the 787 to be between hubs just like with the 76ER, -400 and 777. However, we expect to keep the ER's flying for many years to come.
 
Re: Boeing set for ultimate 787 Dreamliner wing test on Sund

index1.jpg
 
Re: Boeing set for ultimate 787 Dreamliner wing test on Sund

seagull said:
Expect them to spin the results of just over 150% to imply that it is very strong, rather than just barely meeting the certification requirements~
Click to expand...

It is both. You are right that it is not a herculean number it is still impressive for a composite material. While 150% is minimum it is well above what an airplane should ever see, anywhere near that means the pilot sucks.
 
Re: Boeing set for ultimate 787 Dreamliner wing test on Sund

pullup said:
It is both. You are right that it is not a herculean number it is still impressive for a composite material. While 150% is minimum it is well above what an airplane should ever see, anywhere near that means the pilot sucks.
Click to expand...

First, composites are actually stronger, generally.

Second, it is only hopefully what it will ever see, but not as uncommon as you might think.

Third, finding numbers approaching that is quite often totally separate than pilot skills when the matter is actually investigated.
 
Re: Boeing set for ultimate 787 Dreamliner wing test on Sund

seagull said:
First, composites are actually stronger, generally.
Click to expand...

Generally and theoretically yes, but their failure modes are completely different then metal...which is why I am not truly sold on them yet.



seagull said:
Second, it is only hopefully what it will ever see, but not as uncommon as you might think.
Click to expand...

It is based off statistical analysis, of course :laff: and I would think instantaneous g-forces may approach this for milli-seconds but hopefully nothing prolonged.

seagull said:
Third, finding numbers approaching that is quite often totally separate than pilot skills when the matter is actually investigated.
Click to expand...

Yeah it was more tongue-in-cheek by saying a real pilot wouldn't be pulling those g's and would be avoiding any weather which would induce turbulence leading to structural failure. Obviously the two are somewhat correlated but not really. :)
 
You must log in or register to reply here.
Back
Top