Single lever drive system

A human-powered-system operated by at least one arm of an operator to be reciprocated fore and aft to produce a drive output, comprising:

• an arm lever capable of reciprocation and rotation utilized by said operator;
• a reciprocating member having a fulcrum point and rotationally supporting said arm lever near an opposite end of said operator;
• a controller operatively connecting the rotational movements of said arm lever to a controlled output at a first connection point;
• a drive output having an input end and an output end, wherein said input end receives reciprocating movements of said arm lever;
• a slide mechanism connected to the arm lever and coupled to the reciprocating member to allow the arm lever to slide relative to the reciprocating member;
• and
• a rack link coupled to the slide mechanism at a second connection point spaced apart from the first connection point and to the input end of the drive output, the rack link pivotable about the input end of the drive output as a function of a position of the slide mechanism and configured to translate reciprocating movement of the arm lever to the drive output about the fulcrum point.