1. This newly drawn circle represents the potential motion of the crank arm . 2. Draw the crank arm pivot point anywhere on this ground level. 3. The counter-weights are screwed on the center and outer crank arms . 4. Therefore, given the stroke, the length of the crank arm can be determined. 5. To measure torque, strain gages which are precisely laid along the left crank arm . 6. With all in-line slider-crank mechanisms, the stroke is twice the length of the crank arm . 7. These gages detect the flex of the crank arm when a downward force is applies. 8. Make sure the crank arm has not come loose from the bottom edge, inside the window. 9. The crank had intricately CNC machined wide hollow crank arms made of two halves glued together. 10. Once drawn, the crank arm should be coincident with the ground level axis that was initially drawn.
