[WWI] about weathering

[Hooper, Dave]

Hi Diego

Perhaps one way of finding out would be to simulate the fabric. There
must be a recipe for early aluminium dope somewhere. Perhaps you could
obtain the ingredients, make some and apply it to some suitable fabric.
The fabric could be stretched over a frame and then subjected to aging
and light fastness tests. I guess exposure to moisture would be a
suitable test.

I'm not sure whether it's applicable, but for footwear we can simulate
aging by placing the shoes in an oven. 1 week at 50oC is said to
simulate 3 months - so two weeks would simulate 6 month etc....
We can also test for light fastness by exposing a sample to strong light
for a set period of time. Our particular set up is calibrated to 40
hours.

Regards

Dave
 

-----Original Message-----
From: wwi-bounces at wwi-models.org [mailto:wwi-bounces at wwi-models.org] On
Behalf Of Diego Fernetti
Sent: 11 April 2008 12:42
To: World War I Modeling Mailing List
Subject: [WWI] about weathering

The recent Karaya kit of the Nieuport 25 came up with an interesting set
of
pictures of the finished model
http://www.karaya.ceti.pl/eng/sf_ni25_2.html
Shows a well worn (more than that, a SOILED airframe, IMHO) Nieuport,
and
this made me remind something I've been thinking of...
How does weather a silver painted airplane? Maybe it just becomes
duller, a
light grey machine? Or like this, it shows patches of burnt oil and
grime in
spots? I've seen several black and white pictures of nieuports in state
of
unrepair, especially the Russian machines, and it's a fact that you can
tell
apart the newwly covered nieuports and the ones that have flown its
share.
But how did they looked like? Modern replicas are too clean and
polished,
while the only contemporary colour picture I know of an aluminium doped
Nieuport shows a pristine machine.
Any thoughts on this?
D.



 


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