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COMPONENT

K2306.5 Brushless DC Motor

By FlashHobby ↗

The FlashHobby K2306.5 Brushless DC Motor is a compact three-phase outrunner for 5–6 inch propeller applications. It combines a 12N14P configuration, aluminum bell and NSK bearing with 1900KV, 2300KV or 2550KV options. Supplied with mounting hardware, it requires ESC control and configuration-specific electrical and propeller matching.

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FlashHobby K2306.5 brushless DC motor with red housing and threaded shaft
FlashHobby K2306.5 brushless DC motor with red housing and threaded shaft
Motor architectureThree-phase outrunner brushless motor
Weight36gIncluding the cables.
Motor dimensions29.8 x 18.8mm
Stator dimensionsDiameter: 23mm; height: 6mm
Shaft diameter3mm
Mounting screw pattern16x16mm (M3*4)

Product overview

The FlashHobby K2306.5 Brushless DC Motor is a propulsion component recommended for 5–6 inch propellers. Its three-phase outrunner architecture combines a 12N14P configuration, an NSK bearing and a 6082 aluminum bell. The motor measures 29.8 x 18.8mm and weighs 36g including its cables. Mechanical integration uses a 3mm shaft and a 16x16mm mounting screw pattern specified as M3*4. The stator measures 23mm in diameter and 6mm in height, while the 20#AWG motor cable provides 150mm of connection length.

The motor comes in 1900KV, 2300KV and 2550KV versions, with custom KV also offered. Control requires an ESC and a PWM adjustment range of 900–2100US; the working temperature range is -0°C to +80°C. Voltage, current, power and thrust specifications depend on the selected winding and propeller configuration. For example, the 1900KV specification gives 1617g maximum pull with 6S and a GF6040 3R propeller. The supplied package contains one motor, four M3X7mm screws and one M5 nut, making it a motor component package rather than a flight platform or airframe kit.

Specifications

SpecificationValue & conditions
Motor architectureThree-phase outrunner brushless motor
Weight36gIncluding the cables.
Motor dimensions29.8 x 18.8mm
Stator dimensionsDiameter: 23mm; height: 6mm
Shaft diameter3mm
Mounting screw pattern16x16mm (M3*4)
Motor configuration12N14P
Motor cable20#AWG, 150mm
Bearing and bellNSK bearing; 6082 aluminum bell
KV options and recommended propeller size1900KV, 2300KV, 2550KV or custom KV; recommended for 5~6 inch propellers
1900KV electrical and thrust specifications
  • Maximum pull: 1617g;
  • voltage: DC16~25.0 V / Li-Po (4-6S);
  • no-load/maximum-load current: 1.01A/23.89A;
  • no-load speed: 0~1900PRM/1v;
  • maximum power: 705.9W
1900KV configuration; maximum pull with 6S/GF6040 3R.
2300KV electrical and thrust specifications
  • Maximum pull: 1577g;
  • voltage: DC12~24V / Li-Po (3-4S);
  • no-load/maximum-load current: 1.79A/34.21A;
  • no-load speed: 0~2300PRM/1v;
  • maximum power: 695.5W
2300KV configuration; maximum pull with 4S/GF6040 3R.
2550KV electrical and thrust specifications
  • Maximum pull: 1406g;
  • voltage: DC12~16.8 V / Li-Po (3-4S);
  • no-load/maximum-load current: 1.65A/32.86A;
  • no-load speed: 0~2550PRM/1v;
  • maximum power: 531.3W
2550KV configuration; maximum pull with 4S/GF60403R.
Working temperature range-0°C~+80°C
Control methodESC with PWM signal adjustment; PWM range: 900–2100USControl using an ESC.
Supplied configuration1 FlashHobby motor, 4 M3X7mm screws and 1 M5 nut
GF5040 2R performance at 60%
  • Voltage: 24.54 V;
  • current: 11.35 A;
  • power: 278.5 W;
  • thrust: 748 g;
  • efficiency: 2.69 g/W
1900KV motor; GF5040 2R propeller; 60% throttle.
GF5040 2R performance at 70%
  • Voltage: 24.51 V;
  • current: 14.59 A;
  • power: 357.6 W;
  • thrust: 962 g;
  • efficiency: 2.69 g/W
1900KV motor; GF5040 2R propeller; 70% throttle.
GF5040 2R performance at 80%
  • Voltage: 24 V;
  • current: 18.67 A;
  • power: 448.1 W;
  • thrust: 1245 g;
  • efficiency: 2.78 g/W
1900KV motor; GF5040 2R propeller; 80% throttle.
GF5040 2R performance at 90%
  • Voltage: 23.83 V;
  • current: 24.01 A;
  • power: 572.2 W;
  • thrust: 1460 g;
  • efficiency: 2.55 g/W
1900KV motor; GF5040 2R propeller; 90% throttle.
GF5040 2R performance at 100%
  • Voltage: 24.16 V;
  • current: 23.74 A;
  • power: 573.6 W;
  • thrust: 1447 g;
  • efficiency: 2.52 g/W
1900KV motor; GF5040 2R propeller; 100% throttle.
GF5047 3R performance at 60%
  • Voltage: 25.74 V;
  • current: 14.05 A;
  • power: 361.6 W;
  • thrust: 842 g;
  • efficiency: 2.33 g/W
1900KV motor; GF5047 3R propeller; 60% throttle.
GF5047 3R performance at 70%
  • Voltage: 24.24 V;
  • current: 16.78 A;
  • power: 406.7 W;
  • thrust: 1087 g;
  • efficiency: 2.67 g/W
1900KV motor; GF5047 3R propeller; 70% throttle.
GF5047 3R performance at 80%
  • Voltage: 24.24 V;
  • current: 24.95 A;
  • power: 604.8 W;
  • thrust: 1339 g;
  • efficiency: 2.21 g/W
1900KV motor; GF5047 3R propeller; 80% throttle.
GF5047 3R performance at 90%
  • Voltage: 24.24 V;
  • current: 33.2 A;
  • power: 804.8 W;
  • thrust: 1532 g;
  • efficiency: 1.90 g/W
1900KV motor; GF5047 3R propeller; 90% throttle.
GF5047 3R performance at 100%
  • Voltage: 24.41 V;
  • current: 32.25 A;
  • power: 787.2 W;
  • thrust: 1493 g;
  • efficiency: 1.90 g/W
1900KV motor; GF5047 3R propeller; 100% throttle.
GF5143 3R performance at 60%
  • Voltage: 25.55 V;
  • current: 13.31 A;
  • power: 340.1 W;
  • thrust: 822 g;
  • efficiency: 2.42 g/W
1900KV motor; GF5143 3R propeller; 60% throttle.
GF5143 3R performance at 70%
  • Voltage: 24.68 V;
  • current: 16.17 A;
  • power: 399.1 W;
  • thrust: 1067 g;
  • efficiency: 2.67 g/W
1900KV motor; GF5143 3R propeller; 70% throttle.
GF5143 3R performance at 80%
  • Voltage: 24.13 V;
  • current: 23.33 A;
  • power: 563.0 W;
  • thrust: 1338 g;
  • efficiency: 2.38 g/W
1900KV motor; GF5143 3R propeller; 80% throttle.
GF5143 3R performance at 90%
  • Voltage: 24.19 V;
  • current: 30.9 A;
  • power: 747.5 W;
  • thrust: 1544 g;
  • efficiency: 2.07 g/W
1900KV motor; GF5143 3R propeller; 90% throttle.
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