QUESTION 4 Q4(a) [TOTAL MARKS: 30] [14 Marks] The shaft shown in Figure 8 is to be balanced by adding balance masses to rotors B and C. The out-of-balance on rotors A, B and D are 24 g.mm, 53 g.mm and 12 g.mm respectively at the angles shown in Figure 8. If the balance masses are to be added at a radius of 25 mm from the axle, determine the balance masses and the angle at which they should be attached. A B C D A 112° 126° ☑ ☑ bo ☑ ☑ D B 150 mm 400 mm 150 mm Figure 8