A horizontal steam engine running at $240$ r$.$p$.$m$.$ has a bore of $300$ mm and a stroke of $600$ mm$.$ The $1\mathrm{.}5$m long connecting rod weighs $100$ kg and the reciprocating parts weigh $150$ kg$.$ When the crank is $60\backslash$deg past its inner dead centre, the steam pressure on the cover side of the piston is $200$ kN$/$m$^2,$ while that on the crank side is $25$ kN$/$m$^2.$ Assuming the piston rod covers $1/5$th area of the piston and considering the inertia of the connecting rod determine the turning moment on the crank shaft.