A reverted two-stage compound gear train with a module of 4 mm for an exact train ratio of 20:1 is developed with reduction of 4:1 in stage 1 and reduction of 5:1 in stage 2. The power transmitted is 4 kw. Gear 2 has 18 teeth and gear 4 has 15 teeth with a face width of 30 mm. (a) If the input speed ne is 1440 rpm and the power transmitted is 4.0 kW, find the tangential load in gear 4. (b) Establish the bending stress in Gear 4, assuming that K= and bending stress is given KW FmY by O = . Lewis factor for 15 teeth is 0.29. (c) The gear wheels 4 and 5 are made with steel having poison ratio of 0.3 and Young's modulus 206 GPa. Find the contact stress in gear 4 assuming the following Contact stress c =-C (+) == Where T = dp sino 2 and 72 = 1 G = |x ( 71 + ( -714) KW F cos 0 6.1+V 6.1 de sino 2 115 # N's 2 Ny Na