Axis C is located above the axis of rotation A of crank 2. The displacement of slider 1 from its right-hand extreme (dead- centre) position is s=sqrt((A͞B+B͞C)²-a²)-A͞Bcos(α)-B͞C*sqrt(1-((A͞B*sin(α)-a)/B͞C)²). The velocity of point C is v_c=v_B*[sin(α)+((cos(α)*(A͞B*sin(α)-a))/(B͞C*sqrt(1-((A͞B*sin(α)-a)/B͞C)²)))] where v_B = velocity of point B of crank 2; a = offset; α = angle of rotation of crank 2.
$1479$SC,4L$