A method of measuring instantaneous flow rates of liquid propellants for rocket research is presented. The instrument investigated utilizes the principle of electromagnetic induction.nAn electromagnetic flowmeter was built, investigated, and satis¬factorily placed in service to measure the rate of flow of an oxidant into a rocket.nThe advantages of this electromagnetic flowmeter consist of (l) its linear calibration curve, which is independent of density and insensitive to the velocity profile;(2) an absence of appreciable lag, which makes it suitable for measurements of instantaneous velocity in rapidly pulsing systems;(3) the absence of any movable parts or restrictions in the flowmeter pipe;and (4) the bidirectional response of the instrument.
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