Knots, Bends, Splices / With tables of strengths of ropes, etc. and wire rigging

by Captain Jutsum

(2). Double Whip.—A rope rove through two single blocks—upper block a tail block, lower one a movable hook block. Power gained—double (Fig. 93).

(3). A Runner adds an additional power to the purchase it is used with (Fig. 94).

(4). Gun Tackle.—single blocks. Power gained—twice or thrice, according to which is the movable block (Fig. 95).