Post by JF Mezei Post by Uwe Klein
The article mentions "starboard". is there any reason why the port side
would not be symmetrical (without cargo door) ?
Puzzling that they would have bothered painting the outside before
cutting out the windows.
My guess is the female mould this piece was assembled and cured on
got a filled first layer of resin in layup. ( Boeing barrels and the
Airbus tailsections are done on male moulds. Female mould gives you
perfect surface for the "use"/visible side.
And most/all of the surface is done with prepreg fabrics and rovings
and not with a slow tapelayer.
The manufacturing future goes the towards large pieces of CF fabrics
and rovings sewn together with fine structure like windowframes,
doorframes, stringers, ... getting difusion resin impregnation on
a female mould. i.e. the mould is loaded with a sheet of resin, on top
goes the prepared structure cloth a pressure membrane next and
the whole assembly is heated under vacuum suction ( process for the
pressure bulkhead currently.)
Airbus argument is that a nonclosed loop workpiece will always
allow better process and quality control than a barrel section
resulting in better quality and/or lower manufacturing cost.
( going by the problems Alenia forex has with tape "folding" and the
less than perfect fit of barrel sections this does seem to carry
Post by JF Mezei
How will they mount such a large spine-less panel to the frame ? Would
they use succion cups to lift/support it while it is mated to the
structure until there are enough rivets to keep it attached ?
That's why I would like to have an inside picture
to see how much structure is cocured to the skin.
my guess is stringers, windowframes, attachment points, all the small stuff you
traditionally rivet on.
Post by JF Mezei
Or does it have enough stiffness that they can grab it by the top and
lift it into position and it would retain its curved shape even if
grabbed by one side ?
Even if it deforms slightly you won't stress it beyond capabilities.
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