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A simulation model for a linear variable gap-reluctance drive with resonant load, a device widely used in automobile horns, is developed. The model, simulable with common electrical simulators, allows fast and accurate computation of: current and voltage waveforms, gap-width; and supplied, lost, and delivered power. A method to obtain model parameters is described. The model is validated comparing simulations against measurements upon real devices. The model can be used to ascertain the behavior of new devices prior to manufacturing and also to guide later device developments.