BLDC MotorHobbywing RTF industrial FPV motors · Ø50.8 mm

RTF 4320 380KV

Name: RTF 4320 380KV
Brand: Hobbywing

4320 380 KV drone motor from Hobbywing for LiPo-8S: up to 8700 g thrust.

Manufacturer datasheet: Hobbywing · RTF 4320 380KV ↗ (checked 2026-10-18)Maker profile & contacts →

Figures are copied from the maker’s published datasheet; curves are calculated from them. Confirm with the manufacturer before ordering. Not stated on the datasheet, estimated from it: rated point (estimated from KV, voltage and maximum current), inductance, rotor inertia, insulation class, IP rating.

Applications:Drones & UAV

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How this motor is made

Full manufacturing overview: 70 mm Outer-rotor BLDC Motor →

Ø50.8 mm frame; built with the same process as the 70 mm outer-rotor reference series.

Assembly steps: 12
Equipment types: 14
BOM lines: 13
PRD suppliers: 85

1. Stator lamination stamping & interlocking
2. Stator powder coating
3. Outer-stator winding
4. Terminal soldering
5. Stator in-process test
6. Trickle impregnation (optional)
7. Stator mounting & Hall board
8. Rotor cup assembly
9. Magnetizing
10. Rotor balancing
11. Final assembly
12. End-of-line test

Export certification: Low-voltage motor without electronics

Rated power: 996 W
Rated torque: 0.882 N·m
Rated speed: 10,780 rpm
Rated efficiency: 90.2 %

Performance curves

Right axis:

SpeedEfficiency (right axis)

Calculated with the linear DC-motor model (constant 29.6 V supply, ignoring resistance rise with temperature).

Full specifications

General

Motor type: BLDC Motor
Series: Hobbywing RTF industrial FPV motors
Frame / flange: Ø50.8 mm

Rated Values

Rated voltage: 29.6 V
Rated power: 996 W
Rated torque: 0.882 N·m
Rated speed: 10,780 rpm
Rated current: 37.3 A

Performance

Stall torque: 22.5 N·m
No-load speed: 11,220 rpm
Rated efficiency: 90.2 %
Peak efficiency: 90.3 %

Electrical

Torque constant Kt: 0.0251 N·m/A
Back-EMF constant Ke: 2.63 V/krpm
Resistance: 0.033 Ω
Inductance: 0.05 mH
No-load current: 2.2 A
Stall current: 897 A
Electrical time constant: 1.52 ms
Mechanical time constant: 0.204 ms

Mechanical

Rotor inertia: 39 g·cm²
Body length: 41.3 mm
Weight: 0.32 kg
Power density: 3,112 W/kg
Insulation class: B
Protection: IP40

Compatible drivers

All drivers →

Drivers whose supply voltage covers this motor and whose continuous current is at least its rated current; drivers from the same maker first. Confirm Hall/encoder type and settings with the maker.

Model	Maker	Motor type	Supply	Cont. / peak current	Feedback
ZM-BL24Z50S	Zeming	BLDC	18–32 V DC	50 A	Hall sensors, Sensorless
ZM-BL48Z50S	Zeming	BLDC	24–72 V DC	50 A	Hall sensors, Sensorless
MBH24100	MINE Motor	BLDC	17–32 V DC	50 A / 100 A	Hall sensors
DEPC-09075-OPEA	ZP Motors	BLDC, Servo	18–90 V DC	52 A / 105 A	Hall sensors, Incremental encoder, Absolute encoder
DCPC-090100-OPE	ZP Motors	BLDC, Servo	18–90 V DC	70 A / 140 A	Hall sensors, Incremental encoder
BCPC-09070-OPE/A	ZP Motors	BLDC, Servo	18–90 V DC	70 A / 140 A	Hall sensors, Incremental encoder, Absolute encoder