A TRIFILAR PENDULUM FOR THE DETERMINATION MOMENTS OF INERTIA
FRANKFORD ARSENAL PHILADELPHIA PA PITMAN-DUNN RESEARCH LABS
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A unique trifilar pendulum was constructed which proved to be an accurate tool for the determination of moments of inertia of nonhomogeneous objects. The pendulum was used with a calibration curve. The curve was generated by plotting a quantity calculated from the weight and the period squared of a number of homogeneous solids of revolution of increasing size as ordinates, against the calculated moments of inertia of these solids as abscissae. The moment of inertia of an unknown was obtained by weighing the object, establishing its period on the pendulum, locating a quantity calculated from its period squared and its weight as an ordinate on the calibation curve, and finding the moment of inertia as the corresponding abscissa.
- Theoretical Mathematics
- Test Facilities, Equipment and Methods