Compact reduction gearbox drive assembly for micro RC aircraft and DIY models Key benefits Lightweight and compact design keeps overall model weight low while adding mechanical torque through a geared drive. speed 7 mm motor delivers strong RPM for efficient propeller thrust at 3.7V input. Ready for small fixed wing planes and light multirotors where space and weight are limited. Supplied as a complete assembly for faster installation or as multiple sets for multimotor projects. What it does This product combines a 7 mm motor and reduction gearbox with a 140 mm propeller to convert motor speed into usable prop thrust for micro RC airplanes and similar applications. The gearbox increases propeller torque and helps the motor drive a larger prop efficiently without increasing motor size or weight. Key specifications Motor diameter by length: 7 mm by 16.5 mm Motor rated voltage: 3.7 V Motor noload speed: 38500 RPM plus or minus 15 percent Propeller length: 140 mm Complete assembly weight: 5 g Color: white Material: others Intended use: Vehicles and Remote Control Toys, Assembly category, For airplanes Model number reference: for Plant Agriculture Drone Sixaxis Quadcopter Package options Available in 1, 2, or 4 sets per Each complete set includes: One 140 mm propeller One 7 mm motor One mounting bracket One large gear and one small gear Two copper sleeves One limit sleeve One middle shaft Why customers choose this assembly Compact motor size fits narrow nose cones and tight mounting bays on micro gliders and small park flyers. The geared reduction lets you use a larger propeller for improved static thrust without oversizing the motor. Low mass of 5 grams minimizes impact on flight characteristics while improving prop efficiency. Supplied hardware and bracket simplify fitting and alignment during installation. Compatibility and applications Fixed wing micro powered gliders and park flyers that accept 7 mm motor installations and 14 cm props Small multirotors and experimental UAVs with limited payload where a geared propeller drive is needed and upgrade of RC aircraft reduction gearboxes where compact, lightweight drive assemblies are required Assembly and installation notes Some basic assembly skills are required despite partial preassembly and delivery checks. Units are assembled and debugged prior to shipment to reduce setup time. Verify motor mounting orientation and secure all sleeves and shaft components. Test operation at low throttle before full flight. Ensure the propeller is mounted securely and balanced for smooth operation. What is included in the product category Reduction Gear Box as an upgrade part for RC models Suitable as a gearbox replacement or upgrade in RC parts and accessories This compact gearbox and motor assembly provides a practical, lightweight solution for converting motor RPM into effective propeller thrust for micro RC aircraft and related DIY projects.