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.

The metallic frame sustaining engine and machine guns is joined to the front of wooden part of fuselage and the central part of the wings.

Above: a section of the wooden longaron and the lower supports of the engine frame.

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.

A detail of the central wing plan and the pin of the landing gear leg.

The landing gear leg bay is visible beyond the pin.

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.

Above: some details of a typical outer wing panel structure.

On the right: the outer wing panel of a La-5FN (probably identical to all La-5). Note the slats and the protruding wing fence.

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.

Left: measures of the wing structure.

Below: the rudder without part of its skinning. The rudder, the elevators and the ailerons had an aluminium alloy structure with a fabric skinning. The image shows the electric wire for the rear navigation light on the trim fence.