GATE Mechanical 2021 Set 1 | Question: 16

Question

Consider a reciprocating engine with crank radius $\text{R}$ and connecting rod of length $\text{L}$. The secondary unbalance force for this case is equivalent to primary unbalance force due to a virtual crank of _______________

• A. radius $\frac{L^{2}}{4R}$ rotating at half the engine speed
• B. radius $\frac{R}{4}$ rotating at half the engine speed
• C. radius $\frac{R^{2}}{4L}$ rotating at twice the engine speed
• D. radius $\frac{L}{2}$ rotating at twice the engine speed