ROPE 59 



having the becket as shown in Figure 84, at the foot of 

 page 57- 



3. Now pass the rope back and forth from block to block, 

 always passing the rope over the sheave next to the ones 

 the rope has been passed over until all the sheaves are filled, 

 and then fasten the end that you have been passing over 

 the sheaves to the becket with a spliced eye, like the one 

 shown in Figure 52. When completed the work should 

 appear as shown in Figure 85. 



A set of blocks in which the block having the becket has 

 one sheave less than the other is reeved in the following 

 way: 



1. Start with the block without the becket, the fall-block, 

 by passing the rope over one of the outside sheaves, as 

 Number 1 in Figure 86. 



2 . Pass the end of the rope in the right direction over the 

 sheave in the other block which is farthest from the becket, 

 as Number 2 in Figure 86. 



Start in the same way even if the block having the becket 

 has only one sheave. If the becket is in the middle of the 

 block, start with either outside sheave. 



3. Now pass the rope back and forth from block to block, 

 always passing the rope over the sheave next to the ones 

 that the rope has been passed over until all the sheaves 

 are filled, and then fasten the end that you have been pass- 

 ing over the sheaves to the becket with a spliced eye made 

 as is the one shown in Figure 52. The completed work 

 should appear as shown in Figure 86. 



Lifting force of blocks. The load that can be lifted or 

 moved with a set of blocks by application of a certain force 

 to the fall-rope depends on (1) the number of plies of rope 

 leading from the block that is fastened to the load; (2) the 

 direction of pull when the fall-rope leads from the block 

 fastened to the load; (3) the amount of force necessary to 

 overcome the friction in the sheaves and the stiffness of the 



