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The AC200 SmartPitch system controller performs constant speed operations and more... Automatic feather and unfeather operations. Visual indication of propeller status at all times. SmartPitch has continuous monitoring of system functions (brush wear, rpm sense, pitch change operation), as well as the option to revert to manual operation for maximum safety. Fully electronic, only uses a very small amount  of power during pitch change, and is very reliable. The SmartPitch controller is computer based.  This means it can be modified to your application as necessary, making it very flexible.