Queller    Drive
Definition
    A propulsion system, designed by
        Ernst Queller,
        which makes interstellar travel
        possible for at least two probes built by
        Earth,
        but using fast neutrons, which are extremely
        destructive near populated areas.
        This drive is meant to be shut off at key times,
        the craft shifting to conventional chemical propellents
        near populated areas,
        but the two craft known to Use the Queller Drive
        have significant design flaws in this regard. | Uses
Notes
    - The Queller Drive appears to be ill-suited for
        manned interstellar travel,
        and Voyager 1,
        though having two seats for crew,
        was launched uncrewed.