A turbine assembly includes a split venturi shroud with two halves in hinged engagement about a vertical hinge axis that bisects the venturi shroud, a split clam jacket with two halves each attached to one of the two halves of the venturi shroud, and a rotor ring including an outer rim and a plurality of propeller blades within the outer rim. The rotor ring and venturi shroud are a rotor and a stator, respectively, of the turbine assembly. The venturi shroud is mountable on a support structure by transitioning from a folded state to an unfolded state. The clam jacket is open when the venturi shroud is folded and closed when the venturi shroud is unfolded, at least a portion of the support structure is surrounded by the clam jacket when in the unfolded state. The rotor ring can be mounted on the venturi shroud.