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Problem 138 jpg

Summary: BH draw f12E1 and mHl representing the springing line and crown line respectively of the semi cylinder Project the points a2 b2 c2 d2 etc to a12 b12 cl2 dl2 on the line f12E1 Fig 90 and set up the heights b12q c12p dl2O e12n etc making them respectively equal to 111 221 331 441 etc A line drawn through m n 0 p q and Y2 gives the curve of penetration

Image Dimensions: 500 x 755