Wing
and V-tail are produced in a sandwich construction with rohacell
as supporting material. To improve the everyday practicality
of the lightweight construction the outer layer of the wing is
made of 50g glass or IM-spread-tow-carbon.
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Erwin
XL medium is also built in sandwich-construction. The
outer skin is made of 70g IM-spread-tow-carbon for the
wing and 39g-carbon for the V-tail.
The upper sides are painted, the undersides are
left in visible carbon using spread-tow fabric.
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Erwin
XL slope is manufactured in a special building method
without sandwich. The outer skin is made of robust 160g
carbon. Because of that, the surface of wing and V-tail
is extremely durable.
Upper sides are painted, undersides left in visible
carbon.
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