Impulse thruster

An impulse thruster is the output manifold of an impulse-powered propulsion system. Ships known to possess impulse thrusters include Jem'Hadar fighters, Galileo-type shuttlecraft; runabouts, and the Delta Flyer II. 

The impulse thrusters aboard runabouts contain one or more magnetic constrictors. 

The impulse thrusters aboard a Class V planetary probe launched by USS Voyager in 2376 maintained that craft's orbit of Kelemane's planet for two hundred years before experiencing failure.