HIGH SPEED REELING OUT LIGHT FIBRE REEL

PURPOSE:To arrange so that a winding collapse such as a crevice or the like which is caused by a temperature cycle may not occur at the winding around of light fibres wound around a bobbin, by forming this bobbin at a light fibre reel, out of a specified fibre reinforced plastic. CONSTITUTION:Light fibres 2 are wound around at a close pitch a tapered cylindrical bobbin 1 at a light fibre reel mounted at the rear portion of a missile or the like, and light fibres are pulled out at a high velocity of one end of the shaft direction of the bobbin as this missile flies and a data link between the missile and the ground is done through these light fibres 2. At this instance, the bobbin 1 is formed of fibre reinforced plastic whose fibre is arranged so that the rate of heat expansion in a perimeter direction may become smaller than the rate of heat expansion in a shaft direction. As a result, even in the case of being encountered with a temperature cycle due to the repetition of a high temperature and a low temperature, the occurrence of a large change at a side pressure acting upon the lower layer of light fibres 2 wound around the bobbin 1, can be prevented. As a result, a winding collapse does not occur at all the winding around of light fibres 2.