Queenhobby 3650 Waterproof Brushless Motor in 2300KV, 3100KV, 3900KV, and 4300KV for 1/10 and 1/8 Scale RC Car and Truck - 4-Pole 12-Slot High-Purity Copper Winding with Precision-Balanced Rotor
The Queenhobby 3650 is a fully waterproof brushless motor available in 4 KV variants - 2300KV, 3100KV, 3900KV, and 4300KV - covering the torque-biased low-KV through to high-speed high-KV range required across 1/10 and 1/8 scale RC car and truck applications on 2S and 3S LiPo power systems. The 3650 can designation indicates a 36mm stator diameter and 50mm stator length, positioning this motor in the medium-large brushless motor class that bridges the gap between the 3300-series motors common in 1/10 scale sport builds and the larger 4274 and 4282 motors used in high-power 1/8 scale competition platforms, providing the torque and power density appropriate for both performance 1/10 scale builds and moderate 1/8 scale truck and car applications from a single motor platform. The 4-pole, 12-slot motor architecture is the established configuration for RC car brushless motors in this size class, delivering a combination of low cogging torque, smooth commutation across the RPM range, and good efficiency at both partial and full-throttle operating points that makes it well-suited to the variable-load driving conditions of RC car and truck operation.
High-purity copper windings across all 12 stator slots maximise electrical conductivity and minimise winding resistance relative to lower-purity conductor alternatives, directly improving motor efficiency and reducing heat generation at equivalent current draw - relevant across all 4 KV variants but particularly significant at the higher current levels of 1/8 scale truck operation, where winding heat is the primary thermal management challenge in sustained full-throttle driving. The precision-balanced rotor eliminates the vibration and bearing stress associated with rotor mass imbalance, contributing to smooth, reliable high-RPM operation and extended bearing service life across the full KV range from the 2300KV torque-focused variant through to the 4300KV high-speed configuration. Shaft options covering both 3.175mm and 5mm diameters extend the motor's chassis compatibility across the range of pinion gear bore standards used in 1/10 and 1/8 scale RC car and truck drivetrains, with the 5mm shaft providing the higher torque transmission capacity required by the larger pinion gears and higher drivetrain loads of 1/8 scale platforms. Full waterproofing sustains reliable operation in wet, muddy, and water-crossing RC driving environments without the stator winding insulation degradation and bearing corrosion that limit non-waterproof brushless motors in outdoor all-weather operation.
Key Features
- 4 KV Variants: Available in 2300KV, 3100KV, 3900KV, and 4300KV for torque and speed characteristic selection across 1/10 and 1/8 scale RC car and truck power requirements
- 3650 Can Platform: 36mm stator diameter and 50mm stator length for medium-large brushless motor torque and power density suited to performance 1/10 and moderate 1/8 scale builds
- 4-Pole 12-Slot Design: Established 4-pole 12-slot motor architecture for low cogging torque, smooth commutation, and good partial and full-throttle efficiency
- High-Purity Copper Windings: Maximum-conductivity copper winding across all 12 stator slots for improved efficiency and reduced heat generation versus lower-purity conductor alternatives
- Precision-Balanced Rotor: Factory-balanced rotor eliminates vibration and bearing stress from rotor mass imbalance for smooth high-RPM operation and extended bearing service life
- Dual Shaft Diameter Options: 3.175mm and 5mm shaft diameter options for pinion gear bore compatibility across 1/10 and 1/8 scale RC car and truck drivetrain standards
- Fully Waterproof: Complete waterproofing for wet, muddy, and water-crossing RC driving environments without stator winding degradation or bearing corrosion
- Maximum Energy Conversion: Precision-engineered motor design and high-purity copper windings combine for maximum electrical-to-mechanical energy conversion efficiency
- 1/10 and 1/8 Scale Compatible: KV range and 3650 can size matched to both 1/10 scale performance sport builds and 1/8 scale truck and car RC platforms
- High-Torque Low-KV Option: 2300KV variant for torque-biased low-speed pulling and traction applications on higher voltage 3S LiPo power systems
- High-Speed High-KV Option: 4300KV variant for maximum no-load RPM and high-speed driving applications on 2S and 3S LiPo power in 1/10 scale sport builds.
Applications
- Performance 1/10 scale RC car and truck builds requiring a waterproof 3650 brushless motor in 3900KV or 4300KV for high-speed sport and racing driving on 2S and 3S LiPo
- 1/8 scale RC truck and car builds requiring a 3650 waterproof brushless motor in 2300KV or 3100KV for torque-biased traction and all-around performance
- Wet, muddy, and water crossing 1/10 and 1/8 scale RC builds requiring a fully waterproof brushless motor with high-purity copper windings and precision-balanced rotor
- 3.175mm pinion bore 1/10 scale drivetrain builds, and 5mm pinion bore 1/8 scale drivetrain builds requiring shaft diameter-appropriate motor selection
- RC car and truck builds requiring a 4-pole 12-slot motor architecture for low cogging torque and smooth commutation across the full throttle range
- High-efficiency RC car builds where high-purity copper windings and precision motor engineering reduce heat generation and improve run-time on equivalent battery capacity
Package List:
