Alpha Air-Powered Single-Cylinder Stirling Engine Model – Alloy Engine with Generator

Experience the elegance of thermodynamics with this alpha-type dual-cylinder Stirling engine—a precision-engineered desktop model that converts heat into smooth, continuous motion through expert craftsmanship and premium materials.

• Alpha-type dual-cylinder, dual-piston Stirling engine design delivers stable, visible mechanical operation.
• Available in two configurations: 200 × 138 × 125 mm (1.8 kg net / 2.0 kg gross) or 190 × 138 × 200 mm (2.2 kg net / 2.5 kg gross).
• Heating tubes made from 304 stainless steel with a 20 mm inner diameter, CNC-machined from 25 mm solid bar stock.
• Precise compression ratio design with a longer heating-side tube and shorter cooling-side tube for optimized thermal efficiency.
• Vertical cylinder layout provides large-area heat absorption and high-efficiency cooling for a greater hot-cold temperature differential.
• Cooling cylinder volume is larger than the heating cylinder, enabling rapid cooling of high-temperature air.
• Hot and cold cylinders are separated by stainless steel heat insulation sheets to maximize temperature difference—the core principle of Stirling performance.
• Power pistons and cylinder sleeves use SUJ alloy steel and GCR15 bearing steel, hardened to 58–62 HRC with ±0.005 mm grinding precision.
• Embedded cylinder liners with 2.5 mm wall thickness ensure excellent gas sealing and long service life.
• 20 mm piston diameter with brass connecting rods and a pure copper crankshaft (28 × 13 mm) for smooth power transmission.
• Precision brass gear system with a 2:1 ratio doubles flywheel speed—at 1,000 crankshaft RPM, the flywheel reaches 2,000 RPM.
• Large-mass flywheel (78 mm diameter, 20 mm thick, 155 g) in 6061 aluminum alloy provides powerful inertia for stable, vibration-free running.
• Equipped with 14 precision bearings for low-friction, quiet operation; upgraded versions feature up to 30 bearings.
• Vertical cylinder design reduces piston pressure on cylinder walls, minimizing wear—similar to modern automotive engine architecture.
• Dual 10 mm aluminum alloy support brackets with a bright black finish, plus a 12 mm T6 aluminum alloy mainboard bracket for efficient heat dissipation.
• Four sets of full copper rocker connecting rods (14 × 104 mm) with integrated bearings for smooth linkage motion.
• Structural components including cylinder jackets, panels, and foot pads crafted from 6061 aluminum alloy.
• 30 mm thickened moso bamboo base adds stability and a refined natural finish.
• Ideal for STEM education, physics demonstrations, desk display, and mechanical engineering enthusiasts.