> >
> I need a linear displacement generator with displacements of in the order
> of 0.2-1mm or so at frequencies of up to ~1KHz or more if possible.
>
> Voice coil actuator as per hard drive heads comes to mind.
>
> A minute or so spent thinking about geared rotary DC motors or stepper
> motor makes then seem unnattractive.
>

Why water rocketry to try not? Pulsed water jet by a proper output chamber
could formed be.
--=20
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