28 Series
Ø28 stator · 6.5–12 mm
Four stack heights on one Ø28 stator, 55 to 78 g. The short stacks rev for 6–7 inch props; the tall ones pull 9 inch at lower KV.
Specification
Pick the model. Read the frame.
Model
D2806.5 · frame
- Rotor poles
- 14
- Motor size
- Ø32.9 × 33.1 mm
- Stator size
- Ø28 × 6.5 mm
- Weight
- 55 g
2 windings
| Winding | Propeller | Supply | Max thrust | Max current | Input power | Peak system eff. | Operating temp. | Internal resistance | Max power |
|---|---|---|---|---|---|---|---|---|---|
| KV1300 | HQ7×3.5 | 24.0 V | 2.535 kgf | 44.8 A | 1.066 kW | 4.38 gf/W @ 50% | 98 °C | 0.080 Ω | 1056 W |
| KV1700 | HQ6×4×3 | 24.0 V | 2.450 kgf | 50.1 A | 1.187 kW | 3.29 gf/W @ 50% | 101 °C | 0.052 Ω | 1170 W |
Figures as published on the manufacturer’s data sheet for this model. Peak and maximum values are single-run readings from the static bench, not continuous ratings.
Technical drawing
Every dimension, drawn.
Model
Measured data
Off the bench, not the brochure.
Static thrust sweeps for all 4 models in this frame — 8 windings in total, exactly as recorded on the test stand.
Model
Winding
Max thrust2.535 kgf
Max current44.8 A
Input power1.066 kW
Peak system eff.4.38 gf/W @ 50%
Operating temp.98 °C
Internal resistance0.080 Ω
Max power1056 W
HQ7×3.5 · 24.0 V
| Throttle (%) | Voltage (V) | Current (A) | Thrust (kgf) | Elec. power (W) | System eff. (gf/W) |
|---|---|---|---|---|---|
| 50 | 24.0 | 7.5 | 0.789 | 180.0 | 4.38 |
| 60 | 24.0 | 13.1 | 1.165 | 312.0 | 3.73 |
| 70 | 23.9 | 18.6 | 1.498 | 446.0 | 3.36 |
| 80 | 23.9 | 29.2 | 1.956 | 696.0 | 2.81 |
| 90 | 23.8 | 37.9 | 2.310 | 902.0 | 2.56 |
| 100 | 23.8 | 44.8 | 2.535 | 1066.0 | 2.38 |
Mechanical interface
- Rotor poles
- 14
- Motor size
- Ø32.9 × 33.1 mm
- Stator size
- Ø28 × 6.5 mm
- Weight
- 55 g
Static bench results as measured; no endurance or thermal-soak qualification is implied.