3- to 5-inch FPV motor
HGLRC SPECTER 2004
A 15.6 g 2004 for 3 to 5-inch quads on 4S–6S: on HGLRC’s 24 V bench the 1800KV pulled up to 1,129 g on a GF5125R, drawing 19.3 A.
- 3 to 5-inch quads
- 4S–6S
- 4 to 5-inch props
The spin is an illustration: the model turns at 1/600 of the no-load speed, and it is a generic 2004 motor drawn from HGLRC’s published sizes, not its exact design. Thrust, current and power are HGLRC’s bench figures for the GF5125R prop at 24 V, read straight across between its throttle steps. Its data starts at 50% throttle.
- Max thrust
- 1,129 g
- GF5125R prop, 24 V
- Weight
- 15.6 g
- with leads, from HGLRC’s spec images; the page text gives 17 g
- Peak current
- 19.3 A
- full throttle
- Max power
- 463 W
- full throttle
from $15.99a motor at HGLRC
A set of four: $63.96
Price seen Oct 19, 2026. Plain links: we earn nothing from them.
What it pulls
HGLRC’s own bench test, one line per prop. Drag across the chart to move the throttle; the model above follows.
At 60% with the GF5125R: 583 g of thrust, 6.8 A, 164 W, 4.51 g per watt.
On your quad
6.9 : 1
Thrust to weight at full throttle: four motors pull 4,516 g with the GF5125R at 24 V.
At 60% throttle they pull 2,330 g, 3.6 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 for $15.99
1,129 g on 6S
The 1800KV pulled 1,129 g at full throttle on a GF5125R at 24 V, drawing 19.3 A.
Source: HGLRC spec sheet and table
Bolt-on prop hub
The prop bolts to the bell with four M2 screws on a 5 mm circle; the 1.5 mm shaft stands 1.15 mm above the bell.
N52H arc magnets
Customised N52H arc magnets, which HGLRC says give strong magnetism and high torque.
Source: HGLRC product page
What to pair it with
Our reading of HGLRC’s numbers, so your build matches what the motor was tested with.
- ESC
- HGLRC asks for an ESC over 25 A and rates the motor at 19.3 A for 5 s. Its tables peak at 19.3 A (GF5125R, 24 V). (HGLRC product page, HGLRC spec sheet and table)
- Props
- 4 and 5-inch props with a 5 mm, four-screw M2 hub. HGLRC tested on a GF4024R, HQT5*3R, HQT5*2*3R and GF5125R; at 24 V the GF5125R pulled most (1,129 g) and the HQT5*2*3R gave the most thrust per watt. (HGLRC spec sheet and table)
- Battery
- 4S–6S. HGLRC’s tables are at 21 V and 24 V. (HGLRC product page, HGLRC spec sheet and table)
- Frame
- Four M2 holes on a 12 × 12 mm pattern. (HGLRC product page, HGLRC spec sheet and table)
Where to buy
- HGLRCthe maker’s store; the 160 mm-lead version$15.99seen Oct 19, 2026Visit
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 | HGLRC product page, HGLRC spec sheet and table |
| Stator | 20 × 4 mm (2004) (from the size in HGLRC’s name) | HGLRC spec sheet and table |
| Configuration | 12N14P (12 stator slots, 14 magnet poles) | HGLRC product page, HGLRC spec sheet and table |
| Battery | 4S–6S LiPo (14.8–25.2 V) | HGLRC product page, HGLRC spec sheet and table |
| Weight | 15.6 g (with leads, from HGLRC’s spec images; the page text gives 17 g) | HGLRC spec sheet and table, HGLRC spec image |
| Dimensions | φ24.78 × 13.15 mm, with 1.15 mm of shaft above the bell (14.3 mm overall) | HGLRC spec sheet and table, HGLRC dimension photo |
| Shaft | 1.5 mm alloy steel, standing 1.15 mm above the bell; four M2 holes on a 5 mm circle in the top of the bell for the prop (HGLRC’s spec lists give the shaft as M1.5 × 3.8 mm; the drawing and the dimension photo show it standing 1.15 mm above the bell) | HGLRC spec sheet and table, HGLRC dimension photo |
| Mounting | 4 × M2 holes on a 12 mm circle (12 × 12 mm) (the drawing labels the base holes 2 × M2 but shows four) | HGLRC product page, HGLRC spec sheet and table |
| Bell | One-piece 7075 aluminium rotor, anodised in two colours | HGLRC product page |
| Magnets | N52H arc magnets | HGLRC product page, HGLRC spec sheet and table |
| Bearings | ISC (as HGLRC gives it) | HGLRC spec sheet and table |
| Winding | 200° high-temperature copper wire on a Kawasaki 1200 silicon-steel stator | HGLRC product page, HGLRC spec sheet and table |
| Max current | 19.3 A (for 5 s, as the page text gives it) | HGLRC product page, HGLRC spec sheet and table |
| Max power | 463 W | HGLRC product page, HGLRC spec sheet and table |
| Leads | 160 mm (the store sells a 160 mm version; HGLRC’s gallery spec image and dimension photo show 90 mm (S3, S4)) | HGLRC product page, HGLRC spec sheet and table |
| In the box | 5 × M2×6 mm and 5 × M2×7 mm screws | HGLRC spec sheet and table |
Bench data
Redrawn from HGLRC’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–6S8 props
| Prop | Throttle | Current (A) | Thrust (g) | Power (W) | Efficiency (g/W) |
|---|---|---|---|---|---|
| GF5125Rat 24 Vmotor at 76 °C | 50% | 3.7 | 446 | 88.8 | 5.023 |
| 100% | 19.3 | 1,129 | 463.2 | 2.437 | |
| HQT5*3Rat 24 Vmotor at 73 °C | 50% | 3.6 | 411 | 86.4 | 4.757 |
| 100% | 18 | 1,101 | 432 | 2.549 | |
| HQT5*2*3Rat 24 Vmotor at 63 °C | 50% | 2.3 | 338 | 55.2 | 6.123 |
| 100% | 10.9 | 983 | 261.6 | 3.758 | |
| GF5125Rat 21 Vmotor at 68 °C | 50% | 3.4 | 356 | 71.4 | 4.986 |
| 100% | 16.2 | 972 | 340.2 | 2.857 | |
| HQT5*3Rat 21 Vmotor at 63 °C | 50% | 3 | 328 | 63 | 5.206 |
| 100% | 14.6 | 914 | 306.6 | 2.981 | |
| HQT5*2*3Rat 21 Vmotor at 53 °C | 50% | 1.7 | 237 | 35.7 | 6.639 |
| 100% | 8.6 | 801 | 180.6 | 4.435 | |
| GF4024Rat 24 Vmotor at 55 °C | 50% | 1.7 | 210 | 40.8 | 5.147 |
| 100% | 9.6 | 681 | 230.4 | 2.956 | |
| GF4024Rat 21 Vmotor at 50 °C | 50% | 1.4 | 164 | 29.4 | 5.578 |
| 100% | 7.6 | 538 | 159.6 | 3.371 |
Source: HGLRC spec sheet and table
Inside the motor
A brushless outrunner: the coils stand still in the middle and the magnets spin around them. From the top down:
- Bell. One-piece 7075 aluminium rotor, anodised in two colours. (HGLRC product page)
- Magnets. Customised N52H arc magnets. (HGLRC product page, HGLRC spec sheet and table)
- Stator. 12N14P on Kawasaki 1200 silicon-steel laminations, wound with 200° high-temperature copper wire. (HGLRC product page, HGLRC spec sheet and table)
- Shaft and bearings. Alloy-steel shaft on ISC bearings. (HGLRC product page, HGLRC spec sheet and table)
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 HGLRC’s published sizes: the 20 × 4 mm stator, 24.78 mm bell, 13.15 mm height, 1.5 mm shaft, 12 mm mounting circle and 12 teeth and 14 magnets. Anything HGLRC 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
- HGLRC: SPECTER 2004 1800KV brushless motor (product page, with features, a spec list and price). Retrieved Oct 19, 2026.
- HGLRC: SPECTER 2004 long description image on the product page: spec list, drawing, efficacy table (50% and 100% throttle per prop and voltage, with one motor temperature per table after 5 s at full throttle) and packing list. Retrieved Oct 19, 2026.
- HGLRC: SPECTER 2004 specification (gallery image on the product page), giving 90 mm leads. Retrieved Oct 19, 2026.
- HGLRC: SPECTER 2004 dimension photo (gallery image): 1.5 mm shaft, 14.3 mm overall, 90 mm leads. Retrieved Oct 19, 2026.
- HGLRC: SPECTER 2004 main product photo (first gallery image). Retrieved Oct 19, 2026.
- HGLRC: SPECTER 2004 side view (gallery image). Retrieved Oct 19, 2026.
