Atorque of magnitude t= 80 n. m
is applied to shaft a b of the gear train shown. knowing that the
allowable shearing stress is 75 mpa in each of the stress solid
shafts, determine the required diameter of shaft e f.

Afour cylinder four-stroke in-line engine has a stroke of 160mm, connecting rod length of 150mm, a reciprocating mass of 3kg and its firing order is 1-3-4-2. the spacing between cylinders is 100mm. i. show that the engine is in balance with regard to the primary inertia forces and primary 3. a and secondary inertia couples. li determine the out of balance secondary inertia force ii. propose ways of balancing this out of balance force and discuss the challenges that will arise