This system measures torque accurately in a VTOL fan drive-line, indicating its reliability in engineering applications.
A description is given of a torque measuring system in which the phase shift between the ends of a loaded shaft is determined by means of toothed wheels and magnetic pick-ups. The results of rig tests and of tests carried out with the system installed in the drive-line of a 12 in. dia. model VTOL fan are discussed. It was concluded that torque measurements, repeatable to an accuracy of ± 2 percent, are possible with this system.
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Levy et al. (1967) studied this question.
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