8-inch FPV motor
BrotherHobby SE 2808
An 8-inch motor for 6S: 28 × 8 mm stator, 58.2 g with leads, and 2,734 g of pull per motor on an 8-inch tri-blade on BrotherHobby’s bench.
- 8-inch builds
- 6S
- 8-inch tri-blade props
The spin is an illustration: the model turns at 1/600 of the no-load speed, and it is a generic 2808 motor drawn from BrotherHobby’s published sizes, not its exact design. Thrust, current and power are BrotherHobby’s bench figures for the HQ 8 × 4.5 × 3 prop at 25.2 V, read straight across between its throttle steps. Its data starts at 30% throttle.
- Max thrust
- 2,734 g
- HQ 8 × 4.5 × 3 prop, 25.2 V
- Weight
- 58.2 g
- with 250 mm leads
- Peak current
- 69.2 A
- full throttle
- Max power
- 1,647 W
- full throttle
from $17.00a motor at BrotherHobby
A set of four: $68.00
Price seen Oct 19, 2026. Plain links: we earn nothing from them.
What it pulls
BrotherHobby’s own bench test, one line per prop. Drag across the chart to move the throttle; the model above follows.
At 60% with the HQ 8 × 4.5 × 3: 1,816 g of thrust, 30.3 A, 764 W, 2.38 g per watt.
On your quad
16.8 : 1
Thrust to weight at full throttle: four motors pull 10,936 g with the HQ 8 × 4.5 × 3 at 25.2 V.
At 60% throttle they pull 7,264 g, 11.2 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 $17.00
2.7 kg on an 8-inch prop
On BrotherHobby’s 6S bench the 1350KV pulled 2,734 g at full throttle on an HQ 8 × 4.5 × 3, drawing 69.2 A.
Source: BrotherHobby test report, BrotherHobby thrust summary
58.2 g with leads
BrotherHobby gives 58.2 g with 250 mm leads.
Source: BrotherHobby product page, BrotherHobby thrust summary, BrotherHobby test report
Hard-anodised 7075
Bell cap and base in 7075 aluminium with a hard-anodised finish, on a SUS420 heat-treated steel shaft.
Source: BrotherHobby product page, BrotherHobby infographic and drawing
Balanced to 3 mg
The test report gives a dynamic-balance standard of 3 mg or less, insulation resistance of 0.5 MΩ or more and a passed coil test.
Source: BrotherHobby test report
What to pair it with
Our reading of BrotherHobby’s numbers, so your build matches what the motor was tested with.
- ESC
- BrotherHobby lists a 6S 80 A ESC; the full-throttle peak was 69.2 A. (BrotherHobby test report, BrotherHobby thrust summary)
- Props
- BrotherHobby pairs it with 8-inch props and tested it on an HQ 8 × 4.5 × 3: 2,734 g at full throttle. (BrotherHobby prop image, BrotherHobby test report)
- Battery
- 6S. (BrotherHobby product page, BrotherHobby test report)
- Frame
- Four M3 holes on a 19 mm circle (19 × 19 mm); four M3 × 8 screws and an M5 flange nut come in the box. (BrotherHobby product page, BrotherHobby infographic and drawing, BrotherHobby packing list)
Where to buy
- BrotherHobbythe maker’s store$17.00seen Oct 19, 2026Visit
Plain links, not affiliate links. Prices change; the store’s page has the current one.
Full specs
Bench data
Redrawn from BrotherHobby’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.
1350KV on 6S, 25.2 V1 prop
| Prop | Throttle | Voltage (V) | Current (A) | RPM | Thrust (g) | Power (W) | Efficiency (g/W) |
|---|---|---|---|---|---|---|---|
| HQ 8 × 4.5 × 3 (8-inch, three blades)motor at 104 °C | 30% | 25.2 | 8 | 9215 | 765 | 201.6 | 3.79 |
| 40% | 25.2 | 10.5 | 10188 | 982 | 264.6 | 3.71 | |
| 50% | 25.2 | 19.6 | 12125 | 1,421 | 493.92 | 2.88 | |
| 60% | 25.2 | 30.3 | 13667 | 1,816 | 763.56 | 2.38 | |
| 70% | 25.1 | 35.8 | 14351 | 2,019 | 898.58 | 2.25 | |
| 80% | 24.9 | 49.7 | 15023 | 2,325 | 1237.53 | 1.88 | |
| 90% | 24.5 | 56.1 | 15689 | 2,460 | 1374.45 | 1.79 | |
| 100% | 23.8 | 69.2 | 15963 | 2,734 | 1646.96 | 1.66 |
Source: BrotherHobby test report
Inside the motor
A brushless outrunner: the coils stand still in the middle and the magnets spin around them. From the top down:
- Bell. 7075 aluminium bell cap, φ33.3 mm, hard anodised, with five spokes. (BrotherHobby product page, BrotherHobby infographic and drawing)
- Shaft. SUS420 heat-treated steel, 5 mm with an M5 thread. (BrotherHobby product page, BrotherHobby infographic and drawing)
- Magnets. N52H arc magnets, 14 poles. (BrotherHobby product page, BrotherHobby infographic and drawing)
- Stator. 28 × 8 mm with 12 slots, in 0.2 mm Kawasaki silicon steel, wound with TU1-grade enamelled wire. (BrotherHobby product page, BrotherHobby infographic and drawing, BrotherHobby test report)
- Bearings. NMB, 12 × 6 × 4 mm. (BrotherHobby product page)
- Base. 7075 aluminium, with four M3 holes on a 19 mm circle and 18 AWG leads 250 mm long. (BrotherHobby product page, BrotherHobby infographic and drawing)
How fast it spins
KV is the motor’s no-load speed per volt. With nothing on the shaft, the 1350KV 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 | 19,980 | 2,331 Hz | 13,986 |
| 4S full | 16.8 | 22,680 | 2,646 Hz | 15,876 |
| 6S nominal | 22.2 | 29,970 | 3,497 Hz | 20,979 |
| 6S full | 25.2 | 34,020 | 3,969 Hz | 23,814 |
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 BrotherHobby’s published sizes: the 28 × 8 mm stator, 33.3 mm bell, 5 mm shaft, 19 mm mounting circle and 12 teeth and 14 magnets. Anything BrotherHobby 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
- BrotherHobby: SE 2808 1350KV Motor (CW) (product page on BrotherHobby’s store, with its spec list, photos and Test Data tab). Retrieved Oct 19, 2026.
- BrotherHobby: SE 2808 weight, maximum thrust and full-throttle summary, with the ESC (image on the product page). Retrieved Oct 19, 2026.
- BrotherHobby: SE 2808 “paired with 8 inch prop” (image on the product page). Retrieved Oct 19, 2026.
- BrotherHobby: SE 2808 exploded view (shaft, caps, magnets, bearings, wire, stator steel) and dimension drawing (image on the product page). Retrieved Oct 19, 2026.
- BrotherHobby: SE 2808 packing list (image on the product page). Retrieved Oct 19, 2026.
- BrotherHobby: SE 2808-1350KV test report on 6S with an HQ 8 × 4.5 × 3, 2022 bench, with drawing and spec table (image on the Test Data tab). The copper temperature is after two minutes at full throttle.. Retrieved Oct 19, 2026.
