Luxair747SP
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A350 Prototypes Production Thread Part 7

Mon Jan 21, 2013 9:35 pm

As the old threat was getting too long, please continue discussing here.


Part No. 6 of the thread can be found here:
A350 Prototypes Production Thread Part 6 (by ManuCH Nov 8 2012 in Civil Aviation)
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Aviaponcho
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RE: A350 Prototypes Production Thread Part 7

Mon Jan 21, 2013 10:31 pm

Ok
So where will the A350 RAT will be

http://ieee.rackoneup.net/rrvs/06/Emergency%20RATs%20Presentation.pdf

A330 like ? ou A300 like

If it's like the aeroweb picture it' new to the A350, and rather far behind the ventral gondola

http://www.aeroweb-fr.net/actualites...t-de-la350-sur-son-a340-300-dessai
 
CM
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RE: A350 Prototypes Production Thread Part 7

Mon Jan 21, 2013 10:42 pm

Quoting Aviaponcho (Reply 1):
So where will the A350 RAT will be

In the aft portion of the WTB fairing, it appears from the test arrangement. This is similar to Boeing widebody twins (not sure about Airbus Twins)

The red test rig looks like a setup to provide pressure data for the rat propeller in this location. Is this Airbus' first time putting a RAT aft of the maximum cross sectional area (Sears-Haack body)?
 
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Francoflier
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RE: A350 Prototypes Production Thread Part 7

Mon Jan 21, 2013 10:53 pm

Quoting CM (Reply 2):
(not sure about Airbus Twins)

The A300/310 have their RATs in the wing to body joint area as well, between the right MLG and the belly.

The A330/340 have their little rodent out underneath the right wing.
I'll do my own airline. With Blackjack. And hookers. In fact, forget the airline.
 
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EPA001
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RE: A350 Prototypes Production Thread Part 7

Tue Jan 22, 2013 7:50 am

Quoting CM (Reply 2):
The red test rig looks like a setup to provide pressure data for the rat propeller in this location.

It sure looks like it with all the sensors mounted on this red testbed.
 
Aviaponcho
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RE: A350 Prototypes Production Thread Part 7

Tue Jan 22, 2013 8:36 am

Quoting CM (Reply 2):

All right, you must be right

In fact, i'm just dreaming that A350 batch 3 will have thinner wall insulation, because
- right now the insulation seems even thicker than on A330 ... even if engine should be quieter (external diameter - internal diameter is 6" on 787, 6.5" on 777, 7 on A330 and 7.5 on A350 !!)
- batch 3 change are discussed to be cabin related...
- a couple of centimeters will help 10 abreast in economy class

But I'm dreaming



Btw I've found no other photo of similar tests, and i've seem no comments on the composite panel acoustic test bed
http://www.flightglobal.com/news/art...re-skin-panel-on-a340-this-341186/
 
parapente
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RE: A350 Prototypes Production Thread Part 7

Tue Jan 22, 2013 10:06 am

Re Reply 5. I was reading one of the many articles in the papers recently on the troubles of the 787.He went on to talk about it's many advantages,with particular reference to passenger comfort etc.At the end (he had clearly flown on it) he mentioned in passing that it was a noisy aircraft to fly on. I have no idea whether this is true or not. But referencing the above comment. I wondered whether the acoustic properties of a carbon tube was different (noisier) than a traditional 'tube' hence the need for additional accoustic insulation?
 
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KarelXWB
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RE: A350 Prototypes Production Thread Part 7

Tue Jan 22, 2013 11:32 am

Update on MSN003:

- The forward and central fuselage sections have arrived in TLS, final assembly should begin in the next few days.
- MSN003 is behind schedule but the assembly team will try to recover some time.
- Completing the central fuselage was more challenging but problems have been fixed in advance to avoid travelling work.
- The aft section should arrive next month.

http://www.bloga350.blogspot.nl/2013...-final-assembly-will-start-in.html

[Edited 2013-01-22 03:33:46]
Close, but no cigar http://vine.co/v/OjqeYWWpVWK
 
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EPA001
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RE: A350 Prototypes Production Thread Part 7

Tue Jan 22, 2013 12:08 pm

Quoting KarelXWB (Reply 7):
Update on MSN003:

Thanks for keeping us up to date. How much time the delay was (late delivery by Spirit) is at best almost 1 month since these panels were expected to be delivered just before Christmas (according to the link you provided). It will be interesting to see how much time they can make up on assembling MSN003.
 
ferpe
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RE: A350 Prototypes Production Thread Part 7

Tue Jan 22, 2013 2:49 pm

Quoting Aviaponcho (Reply 5):
Btw I've found no other photo of similar tests, and i've seem no comments on the composite panel acoustic test bed

Actually if you look closely on the photo you will see that is indeed the insulation test bed A340, you see the composite panel above the RAT rake on the fuselage left hand side in front of the A350 text. It is the Alu panel which was replaced with a CFRP panel and which had and might still have new variants of the different insulation methods applied to it to test the sound and heat insulation capability vs weight, humidity absorption etc. You can see that the windows has a different shape to the A340 windows further back:

Non French in France
 
Aviaponcho
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RE: A350 Prototypes Production Thread Part 7

Tue Jan 22, 2013 3:18 pm

Ferpe,
That's what I said
And I was (wrongly ?) guessing that the red device is an acoustic tool... mesuring noise behin the engine in order to make valid comparison between the old alumium skin and the various CFRP solutions tested for the A350
This red thing seems to be so much bigger than RAT !
 
ferpe
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RE: A350 Prototypes Production Thread Part 7

Tue Jan 22, 2013 4:13 pm

Quoting Aviaponcho (Reply 10):
This red thing seems to be so much bigger than RAT !

OK, I misunderstood you, but that can't be for the noise IMO as it is on the wrong side.

I have this picture I have shown before re placement of the air cond and inerting units, the RAT is also on there. It is placed like the 787 on the aft side of the wing-fairing, here on the belly slightly to the right, just as it is placed on the 340 test aircraft. No doubt the A340 test is to check the dynamic pressure (Q) for its deployment on the A350, it is sufficiently far out from the wing fairing to not have strong influences if it is a 340 fairing or the 350 one IMO. I would think they rather want to test cruise Q, start config Q and landing Q etc :

http://i298.photobucket.com/albums/mm262/ferpe_bucket/AircondinertingandRAT_zps23947434.jpg
Non French in France
 
Aviaponcho
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RE: A350 Prototypes Production Thread Part 7

Tue Jan 22, 2013 4:27 pm

So it's OK for me.
I've seen your picture searching today more inputs  
I must listen experts out there

May I reasked : did anaybody has some inputs from this acoustics tests ?

Thanks
 
goosebayguy
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RE: A350 Prototypes Production Thread Part 7

Tue Jan 22, 2013 6:20 pm

Rolls-Royce have delivered the first XWB engine with the second one due in about two weeks.
 
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EPA001
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RE: A350 Prototypes Production Thread Part 7

Tue Jan 22, 2013 6:39 pm

Quoting goosebayguy (Reply 13):
Rolls-Royce have delivered the first XWB engine with the second one due in about two weeks.

That is another major milestone for the A350-XWB program.   Thanks for the update.
 
Aviaponcho
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RE: A350 Prototypes Production Thread Part 7

Tue Jan 22, 2013 8:04 pm

Yes great milestone
Looking for the EASA TCDS shortly ?
 
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Semaex
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RE: A350 Prototypes Production Thread Part 7

Fri Jan 25, 2013 6:25 pm

Excuse me for asking this maybe stupid question, but I saw the documentary on the BA 744 D-Check the other day (some of you may know it too), where they also show the effects of a lightning strike on aluminium compared to 'plastic' aircraft, which is rather radical.
My question is how Airbus is solving this matter. Seems to me like there must be a good balance between metal and non-metal parts on the fuselage?

Regards
// You know you're an aviation enthusiast when you look at your neighbour's cars and think about fleet commonality.
 
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Stitch
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RE: A350 Prototypes Production Thread Part 7

Fri Jan 25, 2013 6:34 pm

Quoting Semaex (Reply 16):
My question is how Airbus is solving this matter.

Like Boeing, Airbus embeds a metal mesh into the CFRP. This metal mesh allows the lightning to travel to the metal understructure and then out of the plane.

This entry from the A350 blog provides more details as well as a link to a BBC video on the subject.
 
CM
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RE: A350 Prototypes Production Thread Part 7

Fri Jan 25, 2013 6:43 pm

Quoting Semaex (Reply 16):
Excuse me for asking this maybe stupid question, but I saw the documentary on the BA 744 D-Check the other day (some of you may know it too), where they also show the effects of a lightning strike on aluminium compared to 'plastic' aircraft, which is rather radical.
My question is how Airbus is solving this matter. Seems to me like there must be a good balance between metal and non-metal parts on the fuselage?

I have not seen the documentary, but if it was showing lightning damage to a composite part on a 744, then it would have been a sandwich construction composite with a lightweight (and likely honeycomb) core. This is a very different type of material than is used for the majority of structures on the A350 (and 787), which are primarily built of laminate (solid) CFRP material.

The reason why this is an important distinction when it comes to lightning strike is because sandwich composites almost always have some trapped moisture inside the core material. When lightning strikes this kind of composite structure, the lightning energy super-heats the trapped moisture, which in turn, blows the face sheets off of the core. Generally speaking, laminate composites do not have this same mechanism in play during a lightning strike.

However, the A350 has numerous features designed into its structure which help minimize the economic damage from a lightning strike. These include EAF and ECF (expanded aluminum and copper foils), as well as other conductive paths on the exterior of the airplane which serve both as shielding for the structure, as well as providing a "lightning rod" effect in the form of a path of least resistance for attachment of a direct lightning strike. These features are tied into the overall current return path of the airplane, permitting lightning energy to safely pass through the airplane (in the sense of entering at the wingtip and exiting through the tail) with minimal damage to structure or risk to airplane systems.
 
tdscanuck
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RE: A350 Prototypes Production Thread Part 7

Sat Jan 26, 2013 2:41 am

Quoting KarelXWB (Reply 7):
MSN003 is behind schedule but the assembly team will try to recover some time.

That is a phrase pregnant with badness...assembly *always* tries to recover some time but I've never seen that actually work. They're always the recipients of issues cascading down from farther up in the supply chain.

Tom.
 
ferpe
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RE: A350 Prototypes Production Thread Part 7

Sat Jan 26, 2013 5:54 am

Quoting tdscanuck (Reply 19):
Quoting KarelXWB (Reply 7):
MSN003 is behind schedule but the assembly team will try to recover some time.

That is a phrase pregnant with badness...assembly *always* tries to recover some time but I've never seen that actually work. They're always the recipients of issues cascading down from farther up in the supply chain.

That is absolutely correct, what is meant however is that MSN5000 and MSN001 has come together on FAL from a pure assembly viewpoint better then the original planning foresaw, the fit of all the parts has been better then planned according to all involved (or they are outright lying  ). That does not isolate MSN0003 from the problem of late arriving parts or new problems with eg new or changed test installations. Lets see when she is finished, I think the original planning said roll-out 2-3 months after MSN001 ie June-July.
Non French in France
 
BoeingVista
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RE: A350 Prototypes Production Thread Part 7

Fri Feb 01, 2013 1:35 am

The FTB is doing cold weather testing in Iqaluit, a detailed news report attached, despite the news reporter stating that the A380 has 'several' engines, its worth watching.

http://www.cbc.ca/news/canada/north/...0/north-airbus-engine-testing.html
BV
 
Unflug
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RE: A350 Prototypes Production Thread Part 7

Fri Feb 01, 2013 7:37 am

Quoting BoeingVista (Reply 21):
The FTB is doing cold weather testing in Iqaluit, a detailed news report attached, despite the news reporter stating that the A380 has 'several' engines, its worth watching.

Nice find, thanks!

Interesting how the test engines control is "integrated" in the Cockpit - see 1:35.
 
ferpe
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RE: A350 Prototypes Production Thread Part 7

Fri Feb 01, 2013 8:03 am

This should be about the last tests necessary for Engine certification, let's hope for that soon. Would be nice to look at the data in the TCDS.
Non French in France
 
Aviaponcho
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RE: A350 Prototypes Production Thread Part 7

Fri Feb 01, 2013 10:28 am

Hello

http://www.reuters.com/article/2013/...it&utm_medium=twitter&dlvrit=56505

Airbus is watching the Li-ion battery fate with optimism :
1) design is safe
2) in case of regulatory change, they've time for incorporating a change
3) a plan B might be in place

Have a nice day
 
RickNRoll
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RE: A350 Prototypes Production Thread Part 7

Fri Feb 01, 2013 11:15 am

""We identified this fragility at the start of development and we think we resolved it about a year ago," Bregier said. "Nothing prevents us from going back to a classical plan that we have been studying in parallel.""

Always handy to find you have a plan B.
 
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EPA001
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RE: A350 Prototypes Production Thread Part 7

Fri Feb 01, 2013 1:07 pm

Quoting Aviaponcho (Reply 24):
Airbus is watching the Li-ion battery fate with optimism :
1) design is safe
2) in case of regulatory change, they've time for incorporating a change
3) a plan B might be in place

Good to see that they seem to be prepared for everything, and that they have confidence in the safety of their base design of the batteries. What "Plan B" is is the million Dollar question of course.  
 
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EPA001
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RE: A350 Prototypes Production Thread Part 7

Fri Feb 01, 2013 1:07 pm

Quoting BoeingVista (Reply 21):

The FTB is doing cold weather testing in Iqaluit, a detailed news report attached, despite the news reporter stating that the A380 has 'several' engines, its worth watching.

http://www.cbc.ca/news/canada/north/....html

Thanks for the link. It is always nice to watch videos like these.
 
BoeingVista
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RE: A350 Prototypes Production Thread Part 7

Fri Feb 01, 2013 3:21 pm

Looks like you can get pretty close to the action at Iqaluit..

http://www.youtube.com/watch?v=j5T4Rcx0x_Y

The poster of this video says that they were doing RTO's in -30 weather, that must have been fun to see. In fact maybe we could organise an outing for next year when the A350 is bound to be doing its cold weather certification? Only half joking lol...
BV
 
Aviaponcho
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RE: A350 Prototypes Production Thread Part 7

Fri Feb 01, 2013 4:41 pm

Hello guys
New ACAPS for the A350-900 with a lot more details, and...

http://www.airbus.com/fileadmin/medi...ch_data/AC/Airbus-ACA350-Jan13.pdf

- Bulk hold has shrunk ! (from 12.3 m3 to 9.2 m3)
- An A350-900 in maintenance configuration is now 142 t (vs 135 t for an unknown not neccessarly comparable config)
- 9 abreast in economy with 18" seat cushion (from 17.7) 1.5 armrest (from 2" !!) and 18.1 " aisles (from 18.35) This strange layoutis 216.5" wide 3.5" narrower than the max persmissible width (biz layout stays at 220") strange inst'it ?
 
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KarelXWB
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RE: A350 Prototypes Production Thread Part 7

Fri Feb 01, 2013 7:29 pm

Here is a another nice picture of MSN001 in Iqaluit:

http://www.flickr.com/photos/macinuk/8428072508/
Close, but no cigar http://vine.co/v/OjqeYWWpVWK
 
ferpe
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RE: A350 Prototypes Production Thread Part 7

Fri Feb 01, 2013 7:36 pm

Good catch Poncho, if 142t has something to do with the spec OEW (which is seems) then B does not have to be ashamed, this is 53% of MTOW versus the 788 52% something. Lets see if this is a OEW or DOW but what I think we see are that both are cooking with water  .
Non French in France
 
sweair
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RE: A350 Prototypes Production Thread Part 7

Fri Feb 01, 2013 8:23 pm

It was reported some time ago that the first A359s had a few tons overweight, 2-4t iirc. Worst off was the A358.

It´s a different world before the thing actually is flying. How often does an airframe come in at or below the targeted weight.

Another factor, customers have more input into new aircraft designs, there will be things added that was not a part of the start design.

For a building I am making some drawings for I think I have had to change the drawings about 12 times since we started, things get added or removed and with every change the mess gets worse, my pipes wont fit anymore in some areas etc. Then the heat still gets turned on me, I just follow the changes that get decided in meetings. This modern world, I don't know if I am so impressed anymore, people have lost the sense of reality.
 
Aviaponcho
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RE: A350 Prototypes Production Thread Part 7

Fri Feb 01, 2013 8:43 pm

Quoting ferpe (Reply 31):

Ferpe, i guess that it is bow plus fuel (typical reserve fuel for typical trip). You won't drain fuel for every maintenance task
It's my guess
So mew + furnishing + reserve fuel
 
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Stitch
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RE: A350 Prototypes Production Thread Part 7

Fri Feb 01, 2013 9:17 pm

Before Airbus stopped listing OEW in their ACAPS, they used the same criteria to define it as Boeing does. To wit (from the January 2011 A340-500/-600 ACAP):

Quote:
Weight of structure, powerplant, furnishings, systems, and other items of equipment that are an integral part of a particular aircraft configuration plus the operator’s items. The operator’s items are the flight and cabin crew and their baggage, unusable fuel, engine oil, emergency equipment, toilet chemical and fluids, galley structure, catering equipment, passenger seats and life vests, documents, etc.


And the first column of the Ground Clearances table was at OEW ["OWE MID CG"].

[Edited 2013-02-01 13:21:15]
 
a380900
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RE: A350 Prototypes Production Thread Part 7

Sat Feb 02, 2013 2:59 am

If the 787 engines are beginning a new trend, why are the trent XWB not featuring these very thick anti ice protections that can be seen on Trent 1000?
 
ferpe
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RE: A350 Prototypes Production Thread Part 7

Sun Feb 03, 2013 2:04 pm

Quoting a380900 (Reply 35):
If the 787 engines are beginning a new trend, why are the trent XWB not featuring these very thick anti ice protections that can be seen on Trent 1000?

Do you mean that the lips are not painted? That is for the laminar flow as far as I know.
Non French in France
 
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KarelXWB
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RE: A350 Prototypes Production Thread Part 7

Tue Feb 05, 2013 10:46 am

MSN001 in station 30 on February 1, 2013:



And an update on MSN003:

Quote:
The most striking during the visit to the FAL was the absence of other items except the MSN1 in the assembly line. The station 50, where are assembled sections of fuselage from Saint-Nazaire and Germany, was completely empty. Same thing in the station 40 where wings from Great Britain are fixed. According to information gleaned on site, the assembly of the sections of the MSN3 will begin "in the coming days”. However they were originally planned for December. The American manufacturer Spirit, which makes the central section of the fuselage, would be at the origin of these delays.

MSN003 is now ~ 1.5 month behind schedule.
Close, but no cigar http://vine.co/v/OjqeYWWpVWK
 
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KarelXWB
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RE: A350 Prototypes Production Thread Part 7

Tue Feb 05, 2013 11:28 am

And in other news, Airbus has started the first tests on MSN5000.

http://www.airbus.com/no_cache/newse..._medium=all_news&utm_campaign=RSS#

http://fbcdn-sphotos-b-a.akamaihd.net/hphotos-ak-prn1/542753_606596032690018_975780728_n.jpg

[Edited 2013-02-05 03:54:06]
Close, but no cigar http://vine.co/v/OjqeYWWpVWK
 
hloutweg
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RE: A350 Prototypes Production Thread Part 7

Tue Feb 05, 2013 12:14 pm

Quoting KarelXWB (Reply 38):

This is actually, aircraft zero, not MSN5000. But this is a great development.
In Varietate Concordia
 
Aviaponcho
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RE: A350 Prototypes Production Thread Part 7

Tue Feb 05, 2013 12:22 pm

Can we compare it to BBD Ciasta for the Cseries ? (that is running since end of summer 2012 i think)
 
BoeingVista
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RE: A350 Prototypes Production Thread Part 7

Tue Feb 05, 2013 12:51 pm

Quoting Hloutweg (Reply 39):
This is actually, aircraft zero, not MSN5000. But this is a great development.

Yes, this is the iron bird. A350 blog reported it as having begun 'flying' this week.

http://bloga350.blogspot.com.au/2013...xwb-virtually-makes-its-first.html
BV
 
ferpe
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RE: A350 Prototypes Production Thread Part 7

Tue Feb 05, 2013 4:04 pm

Quoting BoeingVista (Reply 41):
Yes, this is the iron bird. A350 blog reported it as having begun 'flying' this week.

I think it has been "flying" for quite some time, what Airbus state is that the test bed flies exactly the missions that MSN001 will fly when they start the test campaign. I can imagine that pilots, flight test crews etc are then staffing the iron bird exactly as they will this summer and that they start to collect data from all the sensors which are representative of what they shall see once they fly. Thereby they and the ground test center crew can identify any parameter that will not behave as expected later and decide if that means the test will be modified or even terminated. All this will be a rader large job where all equipment had to be updated to the (software) revision and status it will have at the summer flights, not a small feat.


Re the delays for MSN003 I think there is something more then just Spirit dragging their feet behind. The thing to notice is that the delays suddenly hit the mid section (where the wings are attached) a bit into the program. Time wise it is after the half wing+pylon+center wingbox has been tested at IABG this summer  Wow! . Also the MSN5000 tests were said to start in March despite the frame being rolled over 23rd of November, I don't think it takes 4 months to hook her up.

My conclusion is A had to make some changes to the center section which will have to be incorporated into MSN003 and MSN5000 as these frames have to demonstrate the structural integrity of the program. MSN001 and 002 does not need to be subjected to full limit load in the flight test program, they can be cleared for a narrower envelope, but 5000 and 003 needs to go to ultimate load (1.5* limit for MSN5000) and limit load (max flight loads for MSN003) respectively otherwise there will be no type certificate.

So I don't think Spirit could not suddenly keep the (unchanged) pace, they could not rally the forces to implement wanted changes fast enough for Airbus needs and then produce sections with these changes in it.
Non French in France
 
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EPA001
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RE: A350 Prototypes Production Thread Part 7

Tue Feb 05, 2013 4:30 pm

Quoting ferpe (Reply 42):
Re the delays for MSN003 I think there is something more then just Spirit dragging their feet behind. The thing to notice is that the delays suddenly hit the mid section (where the wings are attached) a bit into the program. Time wise it is after the half wing+pylon+center wingbox has been tested at IABG this summer   . Also the MSN5000 tests were said to start in March despite the frame being rolled over 23rd of November, I don't think it takes 4 months to hook her up.

My conclusion is A had to make some changes to the center section which will have to be incorporated into MSN003 and MSN5000 as these frames have to demonstrate the structural integrity of the program. MSN001 and 002 does not need to be subjected to full limit load in the flight test program, they can be cleared for a narrower envelope, but 5000 and 003 needs to go to ultimate load (1.5* limit for MSN5000) and limit load (max flight loads for MSN003) respectively otherwise there will be no type certificate.

So I don't think Spirit could not suddenly keep the (unchanged) pace, they could not rally the forces to implement wanted changes fast enough for Airbus needs and then produce sections with these changes in it.

Your analysis sounds highly plausible. But even if this is the case, it is a very good thing that they have acted on the issue (if it is this issue) promptly and in this stage of the program. Time will tell us exactly what the reasons for this delay are.
 
knoxibus
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RE: A350 Prototypes Production Thread Part 7

Wed Feb 06, 2013 8:35 am

Quoting ferpe (Reply 42):
Also the MSN5000 tests were said to start in March despite the frame being rolled over 23rd of November, I don't think it takes 4 months to hook her up.

Sorry but I have to correct you here. It does take up to 5 months to hook it up entirely.

When you enter the "cathedral", you then realise how many cables, pressure gauges and other interfaces have to be connected. This is herculean work at its best, and the way the hangar is set up implies a lot of time consuming activities just to get the airframe properly located at the right spot.

Then every single sensor/gauges must be tested before they start anything. This was always the plan, so no "hidden" issue.
No matter what anybody tells you, words and ideas can change the world.
 
pugman211
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RE: A350 Prototypes Production Thread Part 7

Wed Feb 06, 2013 8:48 am

I may have missed the posts, but is there any updates/images/video of how the XWB blade off test went??? Also, what about the half wing ultimate load test???

Thanks
 
Aviaponcho
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RE: A350 Prototypes Production Thread Part 7

Wed Feb 06, 2013 9:06 am

Remembering an Aweek article revealing 3 batches for the A350

Batch 1 : MSN1 to 5
Batch 2 : MSN6 to 16
Batch 3 : >MSN17

That was in end august 2012 (with FF already planning in mid 2013)

Betting on a 1 frame a month, if the schedules slips a little, can it be possible for airbus to reduce batch 1 ?
 
ferpe
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RE: A350 Prototypes Production Thread Part 7

Wed Feb 06, 2013 10:11 am

Quoting knoxibus (Reply 44):
This was always the plan, so no "hidden" issue.

Thanks knoxibus, much appreciated. Now what delays MSN003 then, because Spirit was delivering for MSN5000 and 001 (and perhaps 002?, we don't know that as it is in cabin pre-equipping and that takes time), was it the changes/adaptations to fit the cabin in 002?
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ferpe
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RE: A350 Prototypes Production Thread Part 7

Wed Feb 06, 2013 10:20 am

Quoting aviaponcho (Reply 46):
can it be possible for airbus to reduce batch 1 ?

The parts for Batch 1 (001 to 005) was already in production IMO, you start producing the long lead time items almost 2 years before FAL and when you start producing a CFRP part you need the design to be 100% finished as it is an additive process. For Al CNC machined parts it is a process of taking the raw cuts first and then finally the finishing touches, the final mm can then be fixed just before those finishing touches.

This was one of the problems that Evrard described as the problem with this changed way of making the frames, you have to be more mature with the design before you can start production, and then once produced you can't modify the part easily. If you find you can reduce the material thickness on a Al part many times you can just re.enter it in the CNC and mill a bit further.
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knoxibus
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RE: A350 Prototypes Production Thread Part 7

Wed Feb 06, 2013 6:50 pm

Quoting ferpe (Reply 47):
Now what delays MSN003 then, because Spirit was delivering for MSN5000 and 001 (and perhaps 002?, we don't know that as it is in cabin pre-equipping and that takes time), was it the changes/adaptations to fit the cabin in 002?

Not sure of the reasons. MSN 003 should be in pretty soon I hope.
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