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The wooden fuselage structure was of semi-monocoque construction.
The skinning was made by layers of birch veneer and plywood, while some
structural parts, as wing spars, longarons and other, were made with phenol-impregnated
wood (delta dravesina).
The skinning, painted with DD-113 yellowish nitroputty, was covered by
a layer of glued fabric, that was puttied with nitroputty, sanded, painted
with a layer of AII Aluminium dope and sanded again, then painted with
camo colors.
On the wreck in Finnish museum, the interior surface of wooden fuselage
appears painted with black primer, and then repainted with silver dope.
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The central part of the wing was made forthemost of wood. On these
drawing of La-5s, the wheels bays, the leg pin, and the fuel tanks between
the longarons are recognizable.
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The outer wing panels were made of wood; another fuel tank was lodged
between the longarons.
Below left: the left side outer wing panel shows the aluminium alloy
structure of the aileron, the trim fence, the tank cap hatch and the position
light hole.
Below: the wing structure without the skinning. The wing should be of
an early production plane, because the slat doesn't appear. |
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The slats were introduced on middle and late production LaGG-3s.
They freely opened by translating forwards and outwards due to the pressure
distribution in particular conditions of flight. The airflow passing between
the slat and the wing is bended parallel to the wing uppersurface, preventing
the stall. |