RETROL R01 1/12 Hot Air Pumping Engine Model External Combustion Engine Water-cooled

Discover the Fascinating World of External Combustion Engines with the RETROL R01 Hot Air Pumping Engine Model!

This beautifully crafted 1/12 scale engine model is not just a collectible—it’s a hands-on educational experience. Designed with authentic retro brass and wood materials, it faithfully reproduces the classic closed-cycle external combustion engine, widely used in industries ranging from railways to factories. Perfect for students, hobbyists, and mechanical enthusiasts alike.

Key Highlights:

Educational & Scientific Insight: Understand the principles of external combustion engines through a fully functional, miniature model. Ideal for classrooms, tech enthusiasts, and anyone curious about mechanical science.

Compact & Reliable Design: Made with durable brass and wood, featuring a modern water-cooled circulation system that keeps the engine running smoothly and safely. Uses butane gas for clean, efficient fuel.

Easy to Use & Maintain: With minimal moving parts, this engine offers stable operation, low wear and tear, and simple maintenance—making it perfect for beginners and experienced modelers alike.

Simple Startup: Just fill the gas tank with butane, open the valve, ignite the boiler, add water, heat for a minute, and spin the flywheel by hand to bring the engine to life. Watching it work is truly mesmerizing!

Unique Gift & Desk Decor: Whether as a striking conversation piece or an impressive gift for teachers, students, or collectors, this engine model adds charm and intrigue to any desk or display shelf.

Want to know more about detailed startup steps and maintenance tips?
👉 [Check out the full user guide and FAQ]

Specifications:

.Material: Brass + Bamboo
.Brand: RETROL
.Form: Ready to Run
.Cyilinder Diameter: 13mm
.Stroke: 24mm
.Speed: 100-1000rpm(A continuous running time of 15 minutes on a single gas tank.)
.Cooling Mode: Water Pump Cooling
.Product Dimensions: 12.5 x 7.5 x 12.8cm
.Product Weight: 900g
.Package Dimensions: 20 x 20 x 20cm
.Package Weight: 1350g
.Packing: Box
.Ages: 14+