Question: A four-cylinder in-line engine has a reciprocating weight of (1.5 mathrm{~kg}), a stroke of (15 mathrm{~cm}), and a connecting-rod length of (25 mathrm{~cm}) in each

A four-cylinder in-line engine has a reciprocating weight of $1.5 \mathrm{~kg}$, a stroke of $15 \mathrm{~cm}$, and a connecting-rod length of $25 \mathrm{~cm}$ in each cylinder. The cranks are separated by $10 \mathrm{~cm}$ axially and $90^{\circ}$ radially, as shown in Fig. 9.47. Find the unbalanced primary and secondary forces and moments with respect to the reference plane shown in Fig.

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