1.9cc Mini Atkinson Cycle Differential Gas Engine Model, 4-Stroke Opposed Piston Interal Combustion Engine, Realistic Internal Combustion Model for STEM Education

[Differential Opposed Piston]: Designed based on the Atkinson cycle differential engine principle, this miniature size packs hardcore technology: a differential opposed piston structure paired with an air-cooling system recreates the core mechanical logic of classic internal combustion engines. [Wooden Base]: Crafted from precision-machined brass and stainless steel with distinctive, elegant lines. Paired with a wooden base for stable display, it softens the metal's starkness while radiating rich vintage charm. [Three-Step Easy Start]: Connect fuel tank hose → Insert 3 AA batteries → Fill with 95% gasoline and turn flywheel clockwise to vent → Flip switch and rapidly spin flywheel to start [Safety Details]: Comprehensive solutions address startup concerns: Power switch must be off during shutdown, providing dual protection for safe operation. [Collector's Edition Gift]: Crafted with unique Atkinson-inspired replication techniques and vintage metallic finishes, it serves as both a fully functional mechanical model and an industrial-aesthetic collector's piece.