Abstract: A decoy aircraft construction of compact format during transport and able to form a decoy model of an aircraft on disposition on an airfield has the form of a rectilinear box blank having six primary panels joined at edges so as to form a box on bringing together free edges thereof. The panels have hinged to each of one or more thereof a single secondary panel or a secondary panel complex formed in turn of a plurality of panels hinged together. No secondary panel or secondary panel complex of the construction when folded at its hinges has overall dimensions greater than those of the primary panels. The location and shape of the secondary panel(s) and secondary panel complex(es) are such that on dismantling to a flat format, the primary panels of the box with the secondary panel(s) and secondary panel complex(es) housed therein, the secondary panel(s) and secondary panel complex(es) augment the flat format by unfolding to impart to it a three dimensional shape simulating that of an aircraft construction.