Product overview This dualpropulsion steam engine model demonstrates the working principle of a doubleended piston driven by controlled steam flow. Key parts are made transparent to allow clear observation of internal motion and air flow. The unit can run from a small gas source or be operated manually, with adjustable speed during pneumatic operation. Key benefits Clear visualization of mechanism: transparent cylinder, steam chamber, and airflow channel make piston movement, reversing valve action, and steam paths visible from multiple angles. Direct demonstration of steam control: a reversing valve alternates steam intake at both ends of the cylinder to push the piston, illustrating practical valve timing and reciprocating motion. Dual operation modes: pneumatic operation for continuous running and manual operation for slowspeed observation or demonstration. Pneumatic mode includes a speed adjustment mechanism. Compact, classroomfriendly size and straightforward setup: designed for use with a small gas source and suitable for teaching, lab demonstrations, or hobby displays. Performance and specifications Piston diameter: 68 mm Piston stroke: 54 mm Instrument dimensions: 395 mm x 140 mm x 230 mm Transparent components: cylinder, steam chamber, and airflow channel made of transparent plastic for full internal visibility Operation modes: pneumatic operation with adjustable speed and manual operation Required supply: small gas source for simulated steam in pneumatic mode Main components Cylinder and piston assembly Steam chamber and airflow channel (transparent) Steam flow reversing valve Crank connecting rod mechanism and flywheel Support bracket and bottom plate How it demonstrates the principle Steam or simulated steam is routed by the reversing valve so that intake alternates at both ends of the cylinder. Each intake stroke pushes the piston, and the crank and connecting rod convert reciprocating motion into rotary motion at the flywheel. At low speed or during manual operation, the interaction between the valve and piston is easy to observe, making the model ideal for stepbystep demonstrations. At higher supply flow, the model runs continuously and shows the same relationships at working speeds. Use scenarios Classroom demonstration: Use the model to teach thermodynamics and mechanical linkages. Students can see valve timing, piston motion, and conversion to rotational motion in real time. Lab or workshop demonstration: Integrate into a lab session to compare manual and pneumatic control, to practice adjusting supply flow and speed, and to record motion for study. Hobby display or museum exhibit: Use the transparent components to show visitors the internal operation of a classic steam engine in an educational display. What to expect with setup and operation Connect a suitable small gas source that provides the required simulated steam flow. For detailed observation, run manually or at low pneumatic speed to follow valve and piston movement. Use the speed adjustment mechanism to demonstrate behavior across a range of operating speeds. The transparent construction allows inspection and photography of internal motion without disassembly. This model is intended for educational and demonstration use where visibility and clear explanation of steam engine mechanics are required.