For the drawworks drum dimensions given in Exercise 1.9 and a fast line tension of 50,000...

   

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For the drawworks drum dimensions given in Exercise 1.9 and a fast line tension of 50,000 lbf, com- pare the drawworks torque when the drum is almost empty to the drawworks torque when the drum con- tains five laps. Answer: 65,104 ft-lbf empty; 85,938 ft-lbf with five laps. 1.9 A drawworks drum has a diameter of 30 in., a width of 56.25 in., and contains 1.25-in. drilling line. For the drawworks drum dimensions given in Exercise 1.9 and a fast line tension of 50,000 lbf, com- pare the drawworks torque when the drum is almost empty to the drawworks torque when the drum con- tains five laps. Answer: 65,104 ft-lbf empty; 85,938 ft-lbf with five laps. 1.9 A drawworks drum has a diameter of 30 in., a width of 56.25 in., and contains 1.25-in. drilling line.