The Vortex Ring Generator is an acrylic tank with internal dimensions of
500 x 500 x 1000 mm. Attached to the center on one end wall is a piston
in cylinder arrangement with an inner diameter of 50 mm. The piston is
controlled by a computed controlled stepper motor connected to a lead
screw. Positional information is given by a shaft-mounted optical
encoder. The Vortex Ring Generator can also be used to create continuous
jets and Zero-Net-Mass Flux jets.