3- to 5-inch light FPV motor
RCinPower GTS V3 2104T
A 15.9 g 2104 that RCinPower made for ultralight 5-inch long-range quads, 3–4-inch toothpicks and ducted quads; on 6S the 1800KV pulled 1,094–1,117 g per motor on three 5-inch props.
- Ultralight 5-inch long range
- 3–4-inch toothpicks and ducted quads
- 4S–6S (1800KV) or 3S–4S (3000KV)
The spin is an illustration: the model turns at 1/600 of the no-load speed, and it is a generic 2104 motor drawn from RCinPower’s published sizes, not its exact design. Thrust, current and power are RCinPower’s bench figures for the Gemfan 5125, 3-blade prop at 24 V, read straight across between its throttle steps. Its data starts at 50% throttle.
- Max thrust
- 1,117 g
- Gemfan 5125, 3-blade prop, 24 V
- Weight
- 15.9 g
- with 3 cm leads, both KVs; RCinPower's scale photos show 15.97 g and 15.90 g (S3)
- Peak current
- 18.5 A
- full throttle
- Max power
- 444 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 5125, 3-blade: 557 g of thrust, 6.8 A, 164 W, 4.07 g per watt.
On your quad
6.9 : 1
Thrust to weight at full throttle: four motors pull 4,468 g with the Gemfan 5125, 3-blade at 24 V.
At 60% throttle they pull 2,228 g, 3.4 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
Made for light builds
RCinPower made the 2104T/M2 for ultralight 5-inch long-range quads, 3–4-inch toothpicks and ducted quads.
Source: RCinPower features image
15.9 g
15.9 g with 3 cm leads in the spec tables; RCinPower's scale photos show 15.97 g and 15.90 g.
Prop mount on the bell
A 1.5 mm shaft end standing 2 mm above the bell, with four M2 holes in the top (opposite holes 5 mm apart) to bolt the prop on.
Source: RCinPower spec sheets
Bench data on 5-inch, 6-inch and ducted props
Gemfan 5126, 5125 and 5130 props at two voltages per KV, a Gemfan 6026, and D76 and D90 props, with the temperature after 3 s at full throttle.
Source: RCinPower spec sheets
What to pair it with
Our reading of RCinPower’s numbers, so your build matches what the motor was tested with.
- ESC
- The 1800KV drew up to 22.1 A at full throttle on 6S (Gemfan 5130, 78 °C); the 3000KV up to 36.2 A on 4S (Gemfan 5130, 80 °C, which RCinPower marks hot). An ESC rated for 25 A per motor covers the 1800KV; the 3000KV needs about 40 A on 4S with 5-inch three-blades. (RCinPower spec sheets)
- Props
- Tested on Gemfan 5126 two-blades, 5125 and 5130 three-blades, a Gemfan 6026, and D76 and D90 props. The Gemfan 5125 pulled the most on both KVs: 1,117 g on 6S (1800KV) and 1,156 g on 4S (3000KV). (RCinPower spec sheets)
- Battery
- 4S–6S for the 1800KV, 3S–4S for the 3000KV. (RCinPower spec sheets)
- Frame
- Four M2 screws, opposite holes 12 mm apart. (RCinPower spec sheets)
Where to buy
- WREKDchoose KV and colourprice on the store’s pageVisit
- GetFPV1800KV or 3000KVprice on the store’s pageVisit
- GetFPV1800KV or 3000KVprice 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 3000KV) | RCinPower spec sheets |
| Stator | 21 × 4 mm (2104) | RCinPower spec sheets |
| Configuration | 12N14P (12 stator slots, 14 magnet poles) | RCinPower spec sheets |
| Battery | 4S–6S LiPo (1800KV); 3S–4S for the 3000KV | RCinPower spec sheets |
| Weight | 15.9 g (with 3 cm leads, both KVs; RCinPower's scale photos show 15.97 g and 15.90 g (S3)) | RCinPower spec sheets |
| Dimensions | φ25.35 × 13.8 mm (without the shaft) | RCinPower spec sheets |
| Shaft | 3 mm inside the motor, 1.5 mm where it leaves the bell, protruding 2 mm | RCinPower spec sheets |
| Mounting | 4 × M2 holes, opposite holes 12 mm apart (12 × 12); the bell's top has 4 × M2 holes for the prop, opposite holes 5 mm apart | RCinPower spec sheets |
| Internal resistance | 210 mΩ (110 mΩ for 3000KV) | RCinPower spec sheets |
| No-load current | 0.5 A (at 10 V; 0.9 A for 3000KV) | RCinPower spec sheets |
| Max current | 22.1 A (RCinPower labels it 3S; it is the same as its highest 1800KV bench reading (Gemfan 5130 at 24 V). 36.2 A for 3000KV, its highest reading at 16 V) | RCinPower spec sheets |
| Max continuous power | 530 W (RCinPower's 3S figure; 580 W for 3000KV) | RCinPower spec sheets |
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 4S–6S9 props
| Prop | Throttle | Current (A) | Thrust (g) | Power (W) | Efficiency (g/W) |
|---|---|---|---|---|---|
| Gemfan 5125, 3-blade (GF5125*3)at 24 Vmotor at 62 °C | 50% | 3.9 | 417 | 93.6 | 4.455 |
| 100% | 18.5 | 1,117 | 444 | 2.516 | |
| Gemfan 5126, 2-blade (GF5126*2)at 24 Vmotor at 62 °C | 50% | 3.65 | 419 | 87.6 | 4.783 |
| 100% | 18.5 | 1,106 | 444 | 2.491 | |
| Gemfan 5130, 3-blade (GF5130*3)at 24 Vmotor at 78 °C | 50% | 4.6 | 439 | 110.4 | 3.976 |
| 100% | 22.1 | 1,094 | 530.4 | 2.063 | |
| Gemfan 5130, 3-blade (GF5130*3)at 21 Vmotor at 61 °C | 50% | 3.5 | 359 | 73.5 | 4.884 |
| 100% | 17.5 | 956 | 367.5 | 2.601 | |
| Gemfan 5125, 3-blade (GF5125*3)at 21 Vmotor at 56 °C | 50% | 2.95 | 327 | 62 | 5.278 |
| 100% | 15.2 | 934 | 319.2 | 2.926 | |
| Gemfan 5126, 2-blade (GF5126*2)at 21 Vmotor at 56 °C | 50% | 2.95 | 338 | 62 | 5.456 |
| 100% | 15.1 | 913 | 317.1 | 2.879 | |
| Gemfan 6026 (GF6026)at 16 Vmotor at 53 °C | 50% | 2.5 | 274 | 40 | 6.85 |
| 100% | 13.1 | 762 | 209.6 | 3.635 | |
| D90at 24 Vmotor at 53 °C | 50% | 2.7 | 273 | 64.8 | 4.213 |
| 100% | 12.9 | 738 | 309.6 | 2.384 | |
| D76at 24 Vmotor at 52 °C | 50% | 2.7 | 231 | 64.8 | 3.565 |
| 100% | 12.3 | 613 | 295.2 | 2.077 |
Source: RCinPower spec sheets
3000KV on 3S–4S9 props
| Prop | Throttle | Current (A) | Thrust (g) | Power (W) | Efficiency (g/W) |
|---|---|---|---|---|---|
| Gemfan 5125, 3-blade (GF5125*3)at 16 Vmotor at 76 °C | 50% | 7.5 | 453 | 120 | 3.775 |
| 100% | 33.6 | 1,156 | 537.6 | 2.15 | |
| Gemfan 5126, 2-blade (GF5126*2)at 16 Vmotor at 74 °C | 50% | 8 | 468 | 128 | 3.656 |
| 100% | 32.1 | 1,121 | 513.6 | 2.183 | |
| Gemfan 5130, 3-blade (GF5130*3)at 16 Vmotor at 80 °C | 50% | 9 | 471 | 144 | 3.271 |
| 100% | 36.2 | 1,117 | 579.2 | 1.929 | |
| Gemfan 6026 (GF6026)at 12 Vmotor at 70 °C | 50% | 6.6 | 392 | 79.2 | 4.949 |
| 100% | 28.1 | 927 | 337.2 | 2.749 | |
| D90at 16 Vmotor at 65 °C | 50% | 5.3 | 299 | 84.8 | 3.526 |
| 100% | 24.1 | 806 | 385.6 | 2.09 | |
| Gemfan 5130, 3-blade (GF5130*3)at 12 Vmotor at 66 °C | 50% | 5.6 | 316 | 67.2 | 4.702 |
| 100% | 25.1 | 795 | 301.2 | 2.639 | |
| Gemfan 5125, 3-blade (GF5125*3)at 12 Vmotor at 62 °C | 50% | 4.9 | 299 | 58.8 | 5.085 |
| 100% | 22.4 | 793 | 268.8 | 2.95 | |
| Gemfan 5126, 2-blade (GF5126*2)at 12 Vmotor at 62 °C | 50% | 4.6 | 292 | 55.2 | 5.29 |
| 100% | 22.4 | 771 | 268.8 | 2.868 | |
| D76at 16 Vmotor at 54 °C | 50% | 5.2 | 248 | 83.2 | 2.981 |
| 100% | 22.9 | 672 | 366.4 | 1.834 |
Source: RCinPower spec sheets
Inside the motor
A brushless outrunner: the coils stand still in the middle and the magnets spin around them. From the top down:
- Shaft. 3 mm inside the motor, 1.5 mm where it leaves the bell, protruding 2 mm. (RCinPower spec sheets)
- Stator. The coils are wound on a stack of thin steel laminations: 21 × 4 mm (2104). (RCinPower spec sheets)
- Base. 4 × M2 holes, opposite holes 12 mm apart (12 × 12); the bell's top has 4 × M2 holes for the prop, opposite holes 5 mm apart. (RCinPower spec sheets)
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 21 × 4 mm stator, 25.35 mm bell, 13.8 mm height, 1.5 mm shaft, 12 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: GTS V3 2104T/M2 (product page; its content is two images with the features, spec tables, dimension drawings and bench data for the T and M2 versions). Retrieved Oct 19, 2026.
- RCinPower: GTS V3 2104 spec sheets (image on the product page: line-up photo, then the spec table, drawing and bench tables of the 2104-T-1800KV, 2104-T-3000KV and the two M2 versions, with temperatures after 3 s at full throttle; props D76 and D90 as RCinPower labels them). Retrieved Oct 19, 2026.
- RCinPower: GTS V3 2104 features (image on the product page: what it is made for, in Chinese; photos, two of them on a scale at 15.97 g and 15.90 g; how the M2 prop mount goes on). Retrieved Oct 19, 2026.