82 ROUGH-AND-TUMBLE ENGINEERING 



and bend about two inches of one end to a sharp angle. 

 Then sharpen both ends to a nice sharp point. Now, 

 i securely a block of hard wood somcwl r the 



face of the fly wheel, so that when the straight end of 

 your tram is placed at a definite point in the block the 

 other, or hook end, will reach the crown of the fly wheel. 

 Be certain that the block cannot move from its place, 

 and be careful to place the tram at exactly the same point 

 on the block at each time you bring the tram into use. 

 You are now ready to proceed to find the dead center, 

 and in doing this remember to turn the fly wheel always 

 in the same direction. Now, turn your engine over till 

 it n ears one of the centers, but not quite to it. You will 

 then, by the aid of a straight-edge, make a clear and dis- 

 tinct mark across the guides and cross-head. Now, go 

 around to the fly wheel and place the straight end of the 

 tram on the same point on the block, and with the hook 

 end make a mark across the crown or center of face of 

 fly wheel ; now turn your engine past the center and on to 

 the point at which the line on cross-head is exactly in 

 line with the lines on guides. Again, place your tram in 

 the same place as before, and make another mark across 

 the crown of fly wheel. By the use of dividers find the 

 exact center between the two marks made on fly wheel 

 and mark this point with a center punch. Now, bring the 

 fTy wheel to the point at which the tram, when placed at 

 its proper place on block, the hook end, or point, will 



