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50mm Viper entry-level ducted training machine
backward gear
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4g multi-frequency remote control
The double gear has wider expandability and stability
ENJOMOR DIY Hot Air Stirling Engine Model Building Kits Golden RC Car_Henglong 50mm Viper entry-level ducted trainingENJOMOR DIY Hot Air Stirling Engine Model Building Kits Golden Instruction Manualclick the Link Features: . Creative Design: Different from the normal Stirling engine, the Stirling engine with a balance structure is equipped with a mini generator. Heated by the alcohol lamp, the engine runs fast&steadily and generates electricity to light LED or bulbs, allowing you to feel the charm of mechanical operation. . Assembly Kit: Comes with an assembly
