A rotational system for a miniature gas turbine engine includes a rotor shaft rotationally mounted to a forward bearing and an aft bearing. The arm is movably coupled to the boom for translational and rotational movement relative to the boom. Individual reflector panels may be replaced by flexing the panel. The installation concept can be employed particularly advantageously in areas short of water where a conventional gassteam installation or a steam power installation can hardly be realized because of the requirement for water. The primary service provider communicates the first encrypted token to the user receiving device.