1. The overdrive on for a Ford Ringo is achieved by using an epicyclic gear set. The input arm (D) carries two planet gears C and E, which mesh with the annulus (A) and the sun gear (B). The overdrive is achieved by locking the sun gear which has 25 teeth. If the anulus (A) has 3 times the number of teeth of the sun gear, a. b. C. Construct a table to show the total motion of the different gears by holding the arm (D) stationary and adding a motion (+b) to the annulus (A). (4) +a to all gears D stationary (+b) to A Total motion question b. below A ? ? ? ? B ? B ? ? 0 C ? D ? ? ? 1 To achieve overdrive, let D rotate 1 revolution (a = 1) and B be held stationary. Calculate the gearing ratios for the set. (6) Determine the number of teeth on the planet gears (C and E), if the module for all the gears is the same. (2) [12] NB: Resolve the question marks in the table above A