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Henry Bushby Transcription pages

VM533B94v3-p225.jpg

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225


Lengthening a hawser by adding a strand
Figured: p.222 figs 1-8. (cf Bushell 37; Barney 131.)
To make: The principle on which the rope
is lengthened is this: Each of the three
strands is cut at a different place on the
rope, so that when the two portions of the
rope are drawn apart, the strands of each
portion protrude to different lengths. The
longest strand of each portion is joined to
the middle one of the other, and the
two shortest strands are joined by an in-
serted fourth strand.
It is convenient to take as units
of length in the calculations necessary
for this process the length of an ^"axial turn"
& the width of an ^"axial strand", three of the
latter being equivalent to one of the
former in the case of a hawser, and
four in the case of a shroud-laid rope.
By an ^"axial turn" is meant the distance along
the central ^axial line of the rope in which
one strand completely encircles it. In

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