The massive model # 51 is the well known Crown Jewel of the Jensen Steam Engine line.   Randy Calhoun, who developed this technical marvel, has graciously allowed us to share the original, first of its kind, model #51.  The design went into production with only very few changes. The dual AC generators and additional lamp posts were changed in order to make use of an AC/ DC combination generator. A small DC saw motor was added to allow  for demonstration of  a bit more electrical theory.  The water tower was simplified for ease of production and the internal wiring was streamlined and compactly integrated into the engine base.  Thanks go out  to Randy for allowing us a peek at his personal masterpece.