COLLAPSIBLE AEROFOIL OF UNMANNED AIRCRAFT Russian patent published in 2012 - IPC F42B10/00 

FIELD: weapons and ammunition.

SUBSTANCE: collapsible aerofoil of an unmanned aircraft comprises a fixed part (1), a movable part (2) and a device of unfolding and fixation. The unfolding and fixation device comprises a vessel (3) installed in the fixed part (1), where a unit of unfolding is installed with a drive and a fixation unit. The unfolding unit comprises a piston (5), a chamber (7) of which is connected to a pneumatic system and is arranged along a chord of the fixed part (1), and an element to reduce friction (9). At the end of the piston (5) there is a rope (8) is fixed, stretching via a through channel in the piston (5). The fixation unit is arranged in the form of spring-loaded stems (14) installed in the body and responsive holes in a bracket (4), the movable part (2) is fixed on the bracket (4). The bracket (4) is installed in the vessel (3) as capable of rotation relative to the axis of aerofoil unfolding. With the bracket (4) there is the second end of the rope (8) connected, equipped with an element to adjust tension of the rope (8).

EFFECT: optimised dimensional characteristics of aerofoil in the folded position when ensuring an unfolding force under conditions of a strong approach flow and higher reliability, possibility to fold repeatedly, for instance, during ground tests of rocket systems.

4 cl, 3 dwg