>>По мощному электромагнитному импульсу от такой катапульты можно определить момент взлёта?
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Electromagnetic Aircraft Launch System (EMALS) used on U.S. Ford-class aircraft carriers does not use a single fixed alternating current frequency. Instead, it employs pulsed disk alternators and a cycloconverter to produce a dynamically rising voltage and rising frequency that typically ranges from roughly 1,700 Hz to over 2,100 Hz during a launch pulse.
