Thank you Jester, now it is clear what's the matter.

Assemblage of the wing.
The wall of the spar consists of 3 parts.

[ATTACH]2211505[/IMG]

[ATTACH]2211506[/IMG]

Split the front and rear edges at an angle.
For this, the ends of the edges are machined to the desired angle.

[ATTACH]2211508[/IMG]

[ATTACH]2211510[/IMG]

Back edges for endings.

[ATTACH]2211512[/IMG]

[ATTACH]2211514[/IMG]

Front edges behind the endings.

[ATTACH]2211516[/IMG]

[ATTACH]2211518[/IMG]

The edge for the endings consists of 3 parts.

[ATTACH]2211520[/IMG]

[ATTACH]2211522[/IMG]

[ATTACH]2211524[/IMG]

[ATTACH]2211526[/IMG]

[ATTACH]2211528[/IMG]

The main spar, pine rake 7X3 mm.

[ATTACH]2211530[/IMG]

[ATTACH]2211532[/IMG]

Before inserting the spar, the ribs are put on the side member wall.

[ATTACH]2211534[/IMG]

[ATTACH]2211536[/IMG]

[ATTACH]2211538[/IMG]

At first the central part of the wing is collected, so I did not put on the ribs for the endings.

[ATTACH]2211540[/IMG]

[ATTACH]2211542[/IMG]

Lower spar with allowance for processing.

[ATTACH]2211544[/IMG]

[ATTACH]2211546[/IMG]

Also on the bottom plane are glued three more slats 2,5X3, 5 mm.

[ATTACH]2211548[/IMG]

The upper spar is cut into the size of the root part of the wing.

[ATTACH]2211550[/IMG]

Also on the upper part of the wing are pasted four more slats 2,5X3, 5 mm.

[ATTACH]2211552[/IMG]

Waiting for the glue to dry up depresses...