Abstract: A camouflage covering intended for affixing to military objects, particularly heated surfaces of tanks. It consists of layers held together by means of neelding and comprises a super-absorbent fibers, so that it can be kept cool by evaporating water previously applied. By including fibers, it may have radar camouflage properties. A substantial pile obtained by needling will give a non-reflecting surface.

Abstract: The present invention relates to a method for assembling a dummy aeroplane in which a latticework carcass is constructed from the components of an assembly kit and covered with a weatherproof drape. The inventive method is characterized by the sequence of steps in which the upper parts of the carcass, or shell, are assembled at a first level, whereafter the assembled upper part is raised to a second level with the aid of lifting devices and held at this level by the lifting devices while lower parts of the carcass are assembled. These steps are then repeated until the undercarriage of the dummy aeroplane has been fitted, whereafter the lifting devices are withdrawn so that the dummy rests on its wheels, all of this assembly work being carried out at a level suitable for the assembly personnel concerned.The invention also relates to an assembly kit for carrying out the method.

Abstract: The thermal emission characteristics of a camouflage material are predetermined to match closely the known thermal emission characteristics of the natural environment in which the particular camouflage material is intended to be used. This control is accomplished by the combination of a reflecting thin metallic layer covered on at least the exposed side by a layer of plastic comprising at least two different plastic materials each having respectively different emissivity properties. The reflecting layer both minimizes the heating of the camouflage material from sources covered by the material and reflects incident heat from meteorological sources such as solar warming. The plastic layer controls and determines the radiation of heat from all parts of the exposed surface of the camouflage in order to present to surveillance equipment a thermal-picture closely simulating that of the surrounding terrain.

Abstract: Camouflage material incorporates means for specifying and providing predetermined degree of reflection of incident radar waves which is optimum for particular use environments. The overall pattern is the resultant of control of reflection of longer radar wavelengths by a layer of electrically conductive fibrils of controlled density and reflection of shorter radar wavelengths by thin mosaic layer of metal.

Abstract: The thermal emission characteristics of sheet form camouflage material is predetermined to match closely the known thermal emission characteristics of the natural environment in which the particular camouflage material is intended to be used. This control is accomplished by the combination of a reflecting thin metallic layer covered on at least the exposed side by a layer of plastic material comprising at least two different plastic materials each having different emissivity properties. The reflecting layer both minimizes the heating of the camouflage material from sources covered by the material and reflects incident heat from meteorological sources such as solar warming and the plastic layer controls and determines the radiation of heat from all parts of the exposed surface of the camouflage to present to surveillance equipment a thermal-picture closely simulating that of the surrounding terrain.

Abstract: Camouflage material incorporates means for specifying and providing predetermined degree of reflection of incident radar waves which is optimum for particular use environments. The overall pattern is the resultant of control of reflection of longer radar wavelengths by a layer of electrically conductive fibrils of controlled density and reflection of shorter radar wavelengths by thin mosaic layer of metal.

Abstract: The invention relates to a thermal camouflage material comprising a supporting layer (4), e.g. a woven material, on which a polyethylene film layer (1), metallized on one side, has been laminated with the aid of fusion adhesive (3). The exposed surface of the plastic film is embossed to make it matte. Polyethylene is highly transparent to infrared radiation and has low emissivity, self radiation. By means of the metal layer (2) there is also obtained radiation insulation so that the outer layer (1) is in a thermal equilibrium which is hardly affected, e.g. by a warm object which is covered with the material, and the outer layer has a low emission ability of about 0.4-0.95, depending on thickness and pigmentation. By applying further patchy layers (5) patchy images will be obtained in image-forming by infrared sensitive instruments in the wavelength ranges 3-5 .mu.m and 8-14 .mu.m. The camouflage material may also include a layer of plastic foam insulating material arranged inwardly of the supporting layer.

Abstract: The invention relates to an apertured camouflage material where the apertures are made as arcuate slits so that tongues are formed (FIGS. 4A, 4B). The material is a laminate of a supporting layer to which is applied a plastics layer which is initially under internal tensional stress, the tongues curling outwards when the internal stresses are activated by the slitting and heat (see FIG. 4B) thus forming a three-dimensional camouflage sheet. The pre-stressed material is blown low density polyethylene film.