SXRegalium Stirling Engine Model Kits, Working Tractor Shape Air-Cooled for Physical Science Experiment Display

️Efficient Air-Cooled SystemEngine stays optimized through natural heat dissipation - air flows over integrated cooling fins after contacting the heat sink, maintaining stable operation without external cooling Clear Engineering EducationWith visible 26.5cm x 13.9cm structure, this model teaches internal combustion principles through hands-on operation. Ideal for ages 15+ to study thermodynamics, mechanical systems, and engine fundamentals ️Substantial Educational DisplayServes as both classroom-ready teaching aid and sophisticated decor. *Safety Note: Contains heated components during operation - recommended for supervised use by teens 15+ and adults Real Working Tractor MechanicsFeatures authentic tractor design with functional micro engine - closed cylinder uses thermal expansion/compression cycles to drive motion. Perfectly demonstrates energy conversion principles in action Premium Golden Metal ConstructionCrafted entirely from durable metal with striking gold finish. Precision-engineered components ensure smooth operation, wear resistance, and long-term display durability (900g substantial build)