The projectile does not have to carry a yarn package with it and it needs only be relatively light in weight; however, it is sufficiently massive to be unaffected by minor obstructions in the warp shed.

• 片梭不必携带纬纱卷装,其重量相对较轻,但是其质量已足以使它能免受梭口中微小障碍的影响。