they're not they can also be made out of fibber glass and also experimenting with carbon fibber.
Made it possible to build them bigger and stronger.
aluminium
Aluminium is very common in aircraft.
Aluminium
what are air crafts made from
Most likely steel
They are tools made of aluminium
Because their high tensile strength compared to their light weight makes them a good choice for aircraft construction.
its made out of aluminium
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Like many other fighter aircraft of that period, Spitfires were made from an aluminium frame and skinned with an aluminium alloy called 'dural'.
Most aircraft wheels are made of aluminium alloys. They are light and strong.