A six-cylinder, single acting, two stroke Diesel engine is arranged with cranks at 60 for the firing sequence 1-4-5-2-3-6. The cylinders, numbered 1 to 6 in succession are pitched 1.5m apart, except cylinders 3 and 4 which are 1.8 m apart. The reciprocating and revolving masses per line are 2.2 kg and 1.6 kg respectively. The crank length is 375 mm, the connecting rod length is 1.6 m, and the speed is 120 r.p.m. Determine the maximum and minimum values of the primary couple due to the reciprocating and revolving parts. Also find the maximum secondary couple and cangular position relative to crank 4 as the reference plane. Take the plane between the cylinders 3 and