5-inch FPV freestyle motor
RCinPower EX2306 Plus
RCinPower's entry-level 5-inch motor, 34 g on a 23 × 6.5 mm stator; on 6S the 1800KV pulled 1,488–1,624 g per motor on three 5-inch props and 1,910 g on a 6-inch.
- 5-inch freestyle on a budget
- 5S–6S (1800KV), 3S–5S (2500KV) or 3S–4S (2750KV)
- 5-inch and 6-inch props
The spin is an illustration: the model turns at 1/600 of the no-load speed, and it is a generic 2306 motor drawn from RCinPower’s published sizes, not its exact design. Thrust, current and power are RCinPower’s bench figures for the Gemfan 6 × 4.5 prop at 22.2 V, read straight across between its throttle steps. Its data starts at 50% throttle.
- Max thrust
- 1,910 g
- Gemfan 6 × 4.5 prop, 22.2 V
- Weight
- 34 g
- with 3 cm leads, all three KVs
- Peak current
- 39.9 A
- full throttle
- Max power
- 886 W
- full throttle
Plain links: we earn nothing from them.
What it pulls
RCinPower’s own bench test, one line per prop. Drag across the chart to move the throttle; the model above follows.
At 60% with the Gemfan 6 × 4.5: 1,112 g of thrust, 20.1 A, 447 W, 2.59 g per watt.
On your quad
11.8 : 1
Thrust to weight at full throttle: four motors pull 7,640 g with the Gemfan 6 × 4.5 at 22.2 V.
At 60% throttle they pull 4,446 g, 6.8 times the quad’s weight.
All-up weight is the quad ready to fly, with its battery and camera. The thrust is the maker’s static bench figure; in the air it is lower.
What you get
Entry-level motor, reworked
RCinPower calls the EX2306 its entry-level motor at a low price; the Plus has a new look, a reinforced base and a stator enlarged to 2306.5 for more power, it says.
Source: RCinPower product image
Thin laminations
The stator is stacked from 0.2 mm Kawasaki silicon-steel sheets.
Source: RCinPower product image
34 g
34 g with 3 cm leads in all three spec tables.
Source: RCinPower product image
Bench data for every KV
Gemfan 5-inch three- and four-blade props and a 6-inch prop at two voltages per KV, with the temperature after 5 s at full throttle.
Source: RCinPower product image
What to pair it with
Our reading of RCinPower’s numbers, so your build matches what the motor was tested with.
- ESC
- On 5-inch props the 1800KV drew up to 37 A at full throttle on 6S, and 39.9 A on the Gemfan 6 × 4.5 (83 °C, which RCinPower marks hot). The 2500KV drew up to 45.4 A on 5S (Gemfan 5 × 4.5 three-blade) and the 2750KV up to 49.9 A on 4S (HQProp 6 × 4); RCinPower marks both runs hot. RCinPower rates them at 40 A, 46 A and 50 A; an ESC rated for at least 40 A per motor covers the 1800KV, and the two higher KVs need 50 A. (RCinPower product image)
- Props
- Tested on Gemfan 5 × 4 three-blades, 5 × 4.5 three-blades (the BN version on the 1800KV), a 5 × 5.1 three-blade and a 5 × 4 four-blade, and on 6-inch props. At full throttle the Gemfan 5 × 4 three-blade was the most efficient on every KV; at the same voltage the 6-inch props pulled the most and ran hottest. (RCinPower product image)
- Battery
- 5S–6S for the 1800KV, 3S–5S for the 2500KV, 3S–4S for the 2750KV. (RCinPower product image)
- Frame
- Four M3 screws, opposite holes 16 mm apart. (RCinPower product image)
Where to buy
- MyFPVStore1800KV or 2500KVprice on the store’s pageVisit
Plain links, not affiliate links. Prices change; the store’s page has the current one.
Full specs
| Spec | Value | Source |
|---|---|---|
| KV | 1,800 rpm/V (also 2500KV and 2750KV) | RCinPower product image |
| Stator | 23 × 6.5 mm (2306.5) (RCinPower names it 2306 and gives the stator as 2306.5, with 0.2 mm Kawasaki silicon-steel laminations) | RCinPower product image |
| Configuration | 12N14P (12 stator slots, 14 magnet poles) | RCinPower product image |
| Battery | 5S–6S LiPo (1800KV); 3S–5S for the 2500KV, 3S–4S for the 2750KV | RCinPower product image |
| Weight | 34 g (with 3 cm leads, all three KVs) | RCinPower product image |
| Dimensions | φ28.69 × 32.05 mm (with the shaft); body 19.05 mm tall | RCinPower product image |
| Shaft | 3 mm; 5 mm across the thread, which stands 13 mm above the bell (3 mm is the spec tables' shaft diameter; the thread size is from the drawing) | RCinPower product image |
| Mounting | 4 × M3 holes, opposite holes 16 mm apart (16 × 16) | RCinPower product image |
| Internal resistance | 78 mΩ (48 mΩ for 2500KV, 38 mΩ for 2750KV) | RCinPower product image |
| No-load current | 1.15 A (at 10 V; 1.5 A for 2500KV, 1.7 A for 2750KV) | RCinPower product image |
| Max current | 40 A (RCinPower's 5S figure; its highest 1800KV bench reading is 39.9 A (Gemfan 6 × 4.5 at 22.2 V). 46 A for 2500KV, 50 A for 2750KV) | RCinPower product image |
| Max continuous power | 900 W (RCinPower's 5S figure; 850 W for 2500KV, 740 W for 2750KV) | RCinPower product image |
Bench data
Redrawn from RCinPower’s test reports. Thrust is static pull on a bench, more than you get in flight. Power is volts × amps; efficiency is thrust divided by power.
1800KV on 5S–6S8 props
| Prop | Throttle | Current (A) | Thrust (g) | Power (W) | Efficiency (g/W) |
|---|---|---|---|---|---|
| Gemfan 6 × 4.5 (GF6*4.5)at 22.2 Vmotor at 83 °C | 50% | 15.2 | 912 | 337.4 | 2.703 |
| 100% | 39.9 | 1,910 | 885.8 | 2.156 | |
| Gemfan 6 × 4.5 (GF6*4.5)at 18.5 Vmotor at 70 °C | 50% | 12.2 | 756 | 225.7 | 3.35 |
| 100% | 34.8 | 1,688 | 643.8 | 2.622 | |
| Gemfan 5 × 5.1, 3-blade (GF5*5.1*3)at 22.2 Vmotor at 75 °C | 50% | 12.6 | 768 | 279.7 | 2.746 |
| 100% | 37 | 1,624 | 821.4 | 1.977 | |
| Gemfan 5 × 4.5 BN, 3-blade (GF5*4.5*3BN)at 22.2 Vmotor at 63 °C | 50% | 10.9 | 755 | 242 | 3.12 |
| 100% | 29.4 | 1,519 | 652.7 | 2.327 | |
| Gemfan 5 × 4, 3-blade (GF5*4*3)at 22.2 Vmotor at 61 °C | 50% | 10.4 | 749 | 230.9 | 3.244 |
| 100% | 26.7 | 1,488 | 592.7 | 2.51 | |
| Gemfan 5 × 5.1, 3-blade (GF5*5.1*3)at 18.5 Vmotor at 66 °C | 50% | 11.3 | 633 | 209.1 | 3.028 |
| 100% | 31.3 | 1,364 | 579.1 | 2.356 | |
| Gemfan 5 × 4.5 BN, 3-blade (GF5*4.5*3BN)at 18.5 Vmotor at 59 °C | 50% | 9.7 | 628 | 179.5 | 3.5 |
| 100% | 24.7 | 1,223 | 457 | 2.676 | |
| Gemfan 5 × 4, 3-blade (GF5*4*3)at 18.5 Vmotor at 54 °C | 50% | 8.8 | 588 | 162.8 | 3.612 |
| 100% | 21.5 | 1,151 | 397.8 | 2.894 |
Source: RCinPower product image
2500KV on 3S–5S7 props
| Prop | Throttle | Current (A) | Thrust (g) | Power (W) | Efficiency (g/W) |
|---|---|---|---|---|---|
| Gemfan 5 × 4.5, 3-blade (GF5*4.5*3)at 18.5 Vmotor at 83 °C | 50% | 17.1 | 834 | 316.4 | 2.636 |
| 100% | 45.4 | 1,724 | 839.9 | 2.053 | |
| HQProp 6 × 4 (HQ6*4)at 14.8 Vmotor at 81 °C | 50% | 15.9 | 841 | 235.3 | 3.574 |
| 100% | 44.1 | 1,710 | 652.7 | 2.62 | |
| Gemfan 5 × 4, 4-blade (GF5*4*4)at 18.5 Vmotor at 73 °C | 50% | 16.1 | 818 | 297.9 | 2.746 |
| 100% | 39.8 | 1,647 | 736.3 | 2.237 | |
| Gemfan 5 × 4, 3-blade (GF5*4*3)at 18.5 Vmotor at 72 °C | 50% | 13.8 | 778 | 255.3 | 3.047 |
| 100% | 37.1 | 1,620 | 686.4 | 2.36 | |
| Gemfan 5 × 4.5, 3-blade (GF5*4.5*3)at 14.8 Vmotor at 71 °C | 50% | 14.6 | 696 | 216.1 | 3.221 |
| 100% | 38.1 | 1,407 | 563.9 | 2.495 | |
| Gemfan 5 × 4, 4-blade (GF5*4*4)at 14.8 Vmotor at 67 °C | 50% | 11.8 | 637 | 174.6 | 3.648 |
| 100% | 32.2 | 1,297 | 476.6 | 2.722 | |
| Gemfan 5 × 4, 3-blade (GF5*4*3)at 14.8 Vmotor at 65 °C | 50% | 11.4 | 624 | 168.7 | 3.698 |
| 100% | 29.8 | 1,257 | 441 | 2.85 |
Source: RCinPower product image
2750KV on 3S–4S7 props
| Prop | Throttle | Current (A) | Thrust (g) | Power (W) | Efficiency (g/W) |
|---|---|---|---|---|---|
| HQProp 6 × 4 (HQ6*4)at 14.8 Vmotor at 85 °C | 50% | 23 | 978 | 340.4 | 2.873 |
| 100% | 49.9 | 1,808 | 738.5 | 2.448 | |
| Gemfan 5 × 4.5, 3-blade (GF5*4.5*3)at 14.8 Vmotor at 73 °C | 50% | 17.9 | 755 | 264.9 | 2.85 |
| 100% | 42.1 | 1,533 | 623.1 | 2.46 | |
| Gemfan 5 × 4, 4-blade (GF5*4*4)at 14.8 Vmotor at 62 °C | 50% | 14 | 704 | 207.2 | 3.398 |
| 100% | 37 | 1,421 | 547.6 | 2.595 | |
| Gemfan 5 × 4, 3-blade (GF5*4*3)at 14.8 Vmotor at 59 °C | 50% | 13.2 | 667 | 195.4 | 3.414 |
| 100% | 34.2 | 1,380 | 506.2 | 2.726 | |
| Gemfan 5 × 4.5, 3-blade (GF5*4.5*3)at 11.1 Vmotor at 58 °C | 50% | 13.4 | 587 | 148.7 | 3.946 |
| 100% | 33.5 | 1,141 | 371.9 | 3.068 | |
| Gemfan 5 × 4, 4-blade (GF5*4*4)at 11.1 Vmotor at 48 °C | 50% | 11.2 | 517 | 124.3 | 4.159 |
| 100% | 28.5 | 1,041 | 316.4 | 3.291 | |
| Gemfan 5 × 4, 3-blade (GF5*4*3)at 11.1 Vmotor at 45 °C | 50% | 10.9 | 493 | 121 | 4.075 |
| 100% | 26.1 | 977 | 289.7 | 3.372 |
Source: RCinPower product image
Inside the motor
A brushless outrunner: the coils stand still in the middle and the magnets spin around them. From the top down:
- Stator. 23 × 6.5 mm, stacked from 0.2 mm Kawasaki silicon-steel sheets. (RCinPower product image)
- Base. Reinforced, with four M3 holes, opposite holes 16 mm apart. (RCinPower product image)
- Shaft. 3 mm, with a 5 mm thread for the prop nut standing 13 mm above the bell. (RCinPower product image)
How fast it spins
KV is the motor’s no-load speed per volt. With nothing on the shaft, the 1800KV version reaches about these speeds; a prop loads the motor and brings it down, typically to around 70–75% of these figures at full throttle.
| Battery | Volts | No-load rpm (KV × V) | Electrical frequency | ESC steps per second |
|---|---|---|---|---|
| 4S nominal | 14.8 | 26,640 | 3,108 Hz | 18,648 |
| 4S full | 16.8 | 30,240 | 3,528 Hz | 21,168 |
| 6S nominal | 22.2 | 39,960 | 4,662 Hz | 27,972 |
| 6S full | 25.2 | 45,360 | 5,292 Hz | 31,752 |
A 14-pole rotor has 7 pole pairs, so every turn of the shaft is 7 electrical cycles, and a six-step ESC switches the phases 42 times per turn.
About the 3D model
A generic outrunner drawn from RCinPower’s published sizes: the 23 × 6.5 mm stator, 28.69 mm bell, 19.05 mm height, 5 mm shaft, 16 mm mounting circle and 12 teeth and 14 magnets. Anything RCinPower doesn’t publish is typical for a motor this size, and the bell’s spoked top, the base and the inside are a generic design, not this motor’s. The colours are read off the maker’s product photos. There are no logos or markings: it is our drawing, not the maker’s.
Sources
- RCinPower: EX2306 Plus (product page; its content is one long image with the features, photos, spec tables, dimension drawings and bench data). Retrieved Oct 19, 2026.
- RCinPower: EX2306 Plus product image (the page's one image: photos and features in Chinese, then the spec table, drawing and bench tables of the EX2306Plus-1800 and EX2306Plus-2500 and of the 2750KV, titled EX2306-2750, with temperatures after 5 s at full throttle); the main product photo, gunmetal and silver, is used for finish. Retrieved Oct 19, 2026.
