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Abstract
On water-jet looms, the reed face can be collinear with the sley pivot and a beat-up point determined such that the warp is kept above the reed base and the reed height is fully utilized. The only alignment required during weft insertion is that of the fixed nozzle with the shed. The optimum nozzle location and the corresponding effective shed size are determined, the space required for weft insertion being assumed to be cylindrical. The extent to which the effective shed size is affected by the duration of the weft-insertion interval, and by the shed-change timing, is then examined.