FLYWHEEL and connecting rod is useful to calculate moment of inertia of connecting rod by oscillation. The effect of flywheel can be observed on oscillations of connecting rod.The apparatus consist of a bearing block mounted on support. This support is fixed on board with the help of nut and bolt. A shaft is fitted in the bearing block, which is free to oscillate. On the side of the bearing block there is an attachment for connecting rod. And on the other side of the bearing block flywheel can be attached.