[WWI] SPAD 13 Internal fitting

Shane Weier bristolf2b at hotmail.com
Tue Apr 17 08:25:27 EDT 2007


>On the Memorial Flight aircraft, many of the fittings appear to be plain
>aluminium - would 'period' aircraft be like this, or would they be coated 
>some way?

Why paint aluminium?

Aside from camouflage, which is not relevant for internal fittings, you'd do 
nothing but add weight.

Aluminium corrodes *very* quickly, but the thin coat of oxide that results 
expands and contracts in exactly the same degree as the underliyng metal. 
That means it doesn't flake off like rust on steel, and because it prevents 
further corrosion, the aluminium underneath is effectively protected from 
further corrosion.

IOW - paint would useless or worse and a good engineer/designer/manufacturer 
would leave it bare

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