def get_float_rps_list(self):
        '''
        get list of constant load parts (we have no constant load at all, but tank will think so),
        with parts durations (float)
        '''
        int_rps = range(int(self.minrps), int(self.maxrps) + 1)
        step_duration = float(self.duration) / len(int_rps)
        rps_list = [(rps, int(step_duration)) for rps in int_rps]
        return rps_list