relative to the blade system 12 in order to prevent excessive and damaging output by the blade system 12 or generator the furling system 20 is thus useful to act essentially as a speed limiter or governor for the blades 8 to prevent them from spinning the generator 100 too fast an example of a furling system is explained in more detail below in one arrangement referring to fig5 6 a 6 b and 6 c the furling system 20 includes a wind blocking device such as a furling door 30 having panels 35 carried by a frame 32 the furling door 30 is configured to be positioned on the frame 32 between an open position allowing wind to flow into the blade system 12 and a closed position to minimize the flow of wind into the blade system 12 for example the furling door 30 is connected to a furling motor 34 by a furling control shaft speed decreaser unit not shown such as a cable and pulley a controller 36 determines the optimal amount of wind blockage for the blade system 12 and adjusts the position of the furling door 30 by using the furling control shaft speed decreaser unit for example the controller 36 is configured to determine the optimal wind velocity level for the generator not shown or other energy producing device such as an alternator which is determined by the power output generated by the blade system 12 of the augmenter system 10 the.