Using the Bilgram diagram to calculate the dimensions for the valve of the working cylinder
Fig. 1: Determining the angle C-O-D for a given length of piston travel at cutoff.O-E: Radius of Eccentric CircleE-F: Outside LapE-Z: Inside LapL: Linear Advancea-a: Angular Advance
Fig. 2, The Bilgram Diagram: As used for determining Valve Dimensions to meet desired Lap, Lead, Admission, Cutoff, and Release. The simultaneous Cushioning for the back side of the piston is also shown.