Page 202 - The Complete Rigger’s Apprentice
P. 202

we end up with 14 feet 4 inches to enter under “Cut
                                                         Length.” If you take a wire that length and use
                                                                                            1
                                                         2 feet of it to make two splices with 4 ⁄ 2-inch-
                                                         circumference eyes around thimbles, you will most
                                                         assuredly get a shroud that is 11 feet 10 inches long.
                                                             Repeat this procedure with the other wires to
                                                         obtain the rest of the cut lengths.

                                                         Measuring Soft Eyes   The above procedure also
                                                         works for eyes made around deadeyes, lizards, or
                                                         other thimble-like objects, but a soft eye—an eye
                                                         made around a mast—poses a couple of extra prob-
                                                         lems. First, soft eyes might travel at various angles
                                                         across a mast, ranging from horizontal to a steep
                                                         diagonal, depending on the rig. How can we deter-
                                                         mine eye length and circumference for an eye at any
                                                         angle? Second, what portion of the finished length
                                                         of the wire does the eye constitute?
                                                             For a nearly horizontal lead, the simplest
                                                         though seldom seen case, the eye rests on a “stop,” a
                                                         shoulder formed by a reduction of mast diameter at
                                                         the desired height. An obvious and simple procedure
                                                         is to measure the circumference of the mast above
                                                         the shoulder and make an eye of this circumference.
                                                         Unfortunately, this results in an eye that is far too
                                                         small, since there’s no allowance for the thickness of
                                                         the wire (Figure 6-6). One response is to add wire
                                                         diameter (including its layers of service and leather)
                                                         to mast diameter, giving a “working diameter” that
                                                         extends to the center of the wire on either side (Fig-
                                                         ure 6-7). Multiply the working diameter by π to find
                                                         the eye circumference. The eye can still be too tight
                                                         to be practical, however; the wire has to bend at
                                                         nearly a right angle where it exits the seizing. Wire
                                                         rope is reluctant to do this, and the seizing would in

                                                          Figure 6-6. Making an eye exactly the mast circum-
                                                          ference doesn’t work, because wire thickness isn’t
                                                          allowed for.

             Figure 6-5. In this sample case, a cut length of
             14 feet 4 inches is obtained by subtracting two thim-
             ble lengths (1 ⁄4 inches each), adding two thimble cir-
                        3
             cumferences (4 ⁄2 inches each), and also adding two
                         1
             splicing lengths (1 foot each) to the finished length.

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