At the heart of the unit is a piston which runs in vertical guides with reduced friction bearings. A connecting rod (con rod) attaches to the piston at one end, and the crank shaft at the other end. All rotating elements have bearings installed. The connecting rod can attach to the crank shaft in 3 different radii. The connecting rod is a fixed length.
The crank shaft is mounted to a beam balance arrangement so that the effort involved with turning the piston can be monitored. A load hanger and weights supplied enable the student to determine the crank effort using the beam balance.
Attached to the crank shaft is a protractor which may be rotated on the beam balance arm and locked in any predetermined angular position. A linear scale is attached to the piston guide so that the piston displacement can be measured. The piston can be fitted with two removable masses to change the piston mass.
A comprehensive instruction manual for lecturer and student, giving full details on apparatus assembly and operation as well as example results. All necessary assembly and operational tools are provided.
Optional accessories: HAC14