Upgrade Stirling Engine Model Military Helicopter Design Science Metal Toy Collection

Description: Item Name:Military Helicopter Engine Size: 210 X 100 X 140mm Weight: About 700g Material: Engine Body: Aluminum Alloy, Stainless Steel Base:Acrylic Plexiglass Plate. Cylinder Piston Copper, The screw parts are stainless steel Speed: up to 300-1000 RPM Warm-up time: 1 to 2 minutes Fuel: 95% medical alcohol Working time: 20minutes Note: 1.After using it, please let the engine natural cool. 2.Do not touch the alcohol burner, burned tube or the metal to avoid burns. 3.Rods at both ends of the activities of joint parts need to regularly add oil lubrication. 4.Please be careful for the shape part when the engine works. Packing including: 1x Military Helicopter Engine