2–2.5-inch FPV motor
VCI Spark 1103
A 4.4 g motor for 2- to 2.5-inch props; on VCI’s 8 V bench the 11000KV pulls 181 g at full throttle on a GF 2512-3.
- 2- to 2.5-inch quads
- 2S (11000KV) or 3S (7500KV)
- Gemfan 2020-4, 2023-3 and 2512-3 props (VCI’s test props)
The spin is an illustration: the model turns at 1/600 of the no-load speed, and it is a generic 1103 motor drawn from VCI’s published sizes, not its exact design. Thrust, current and power are VCI’s bench figures for the GF 2512-3 prop at 8 V, read straight across between its throttle steps. Its data starts at 30% throttle.
- Max thrust
- 181 g
- GF 2512-3 prop, 8 V
- Weight
- 4.4 g
- with its cable; 4.5 g for the 7500KV
- Peak current
- 11.4 A
- full throttle
- Max power
- 91 W
- full throttle
from $21.30a motor at VCI Hobby
A set of four: $85.20
Price seen Oct 19, 2026. Plain links: we earn nothing from them.
What it pulls
VCI’s own bench test, one line per prop. Drag across the chart to move the throttle; the model above follows.
At 60% with the GF 2512-3: 99 g of thrust, 5.0 A, 40 W, 2.47 g per watt.
On your quad
1.1 : 1
Thrust to weight at full throttle: four motors pull 724 g with the GF 2512-3 at 8 V.
At 60% throttle they pull 396 g, 0.6 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 $21.30
Up to about 200 g
On VCI’s bench the 11000KV pulled 181 g on a GF 2512-3 at 8 V and 11.39 A; the 7500KV pulled 201 g on the same prop at 12 V and 8.01 A.
Source: VCI spec sheet
Two KVs
VCI sells it in pairs, in 7500KV for 3S and 11000KV for 2S.
Source: VCI product page, VCI spec sheet
4.4 g
VCI gives 4.4 g with the cable for the 11000KV and 4.5 g for the 7500KV.
Source: VCI spec sheet
What to pair it with
Our reading of VCI’s numbers, so your build matches what the motor was tested with.
- ESC
- VCI’s peak currents are 12.1 A (11000KV, 8 V) and 8.5 A (7500KV, 12 V); pick an ESC rated above that per motor. (VCI spec sheet)
- Props
- VCI tested 2-inch Gemfan 2020-4 and 2023-3 props and the 2.5-inch GF 2512-3, which made the most thrust. (VCI spec sheet)
- Battery
- 2S for the 11000KV, 3S for the 7500KV, as VCI rates them. (VCI spec sheet)
- Frame
- Four M2 screws on a 9 × 9 mm pattern. (VCI drawing)
Where to buy
- VCI Hobbythe maker’s store; a pair, either KV$21.30seen Oct 19, 2026Visit
Plain links, not affiliate links. Prices change; the store’s page has the current one.
Full specs
| Spec | Value | Source |
|---|---|---|
| KV | 11,000 rpm/V (also 7500KV, for 3S) | VCI spec sheet, VCI product page |
| Stator | 11 × 3 mm (1103) | VCI spec sheet |
| Configuration | 9S12P (9 stator slots, 12 magnet poles) | VCI spec sheet |
| Battery | 2S (8 V) LiPo (3S (12 V) for the 7500KV) | VCI spec sheet |
| Weight | 4.4 g (with its cable; 4.5 g for the 7500KV) | VCI spec sheet |
| Dimensions | φ14.2 × 15.4 mm with the shaft, which stands 4.9 mm above the bell | VCI spec sheet, VCI drawing |
| Shaft | 1.5 mm, standing 4.9 mm above the bell; it also shows below the base | VCI spec sheet, VCI drawing |
| Mounting | 4 × M2 holes on a 9 mm circle (9 × 9 mm) (the bell’s top has another 4 × M2 holes on a 5 mm circle) | VCI drawing |
| Magnets | N52SH arc magnets | VCI spec sheet |
| Internal resistance | 150 mΩ (270 mΩ for the 7500KV) | VCI spec sheet |
| Idle current | 0.7 A (at 10 V; 0.4 A for the 7500KV) | VCI spec sheet |
| Peak current | 12.1 A (the GF 2020-4’s full-throttle current at 8 V; 8.5 A for the 7500KV at 12 V) | VCI spec sheet |
| Max instantaneous power | 96.8 W (102 W for the 7500KV) | VCI spec sheet |
| Leads | 28 AWG silicone wire, 50 mm | VCI spec sheet |
Bench data
Redrawn from VCI’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.
7500KV on 3S, 12 V3 props
| Prop | Throttle | Current (A) | Thrust (g) | Efficiency (g/W) | Power (W) |
|---|---|---|---|---|---|
| GF 2512-3motor at 62 °C | 30% | 0.91 | 53 | 4.85 | 10.92 |
| 40% | 1.66 | 77 | 3.87 | 19.92 | |
| 50% | 2.51 | 94 | 3.12 | 30.12 | |
| 60% | 3.33 | 113 | 2.83 | 39.96 | |
| 70% | 4.13 | 127 | 2.56 | 49.56 | |
| 80% | 5.5 | 144 | 2.18 | 66 | |
| 90% | 6.69 | 173 | 2.15 | 80.28 | |
| 100% | 8.01 | 201 | 2.09 | 96.12 | |
| GF 2020-4motor at 69 °C | 30% | 0.98 | 41 | 3.49 | 11.76 |
| 40% | 1.83 | 59 | 2.69 | 21.96 | |
| 50% | 2.68 | 81 | 2.52 | 32.16 | |
| 60% | 3.44 | 94 | 2.28 | 41.28 | |
| 70% | 4.51 | 112 | 2.07 | 54.12 | |
| 80% | 5.69 | 125 | 1.83 | 68.28 | |
| 90% | 6.99 | 144 | 1.72 | 83.88 | |
| 100% | 8.5 | 166 | 1.63 | 102 | |
| GF 2023-3motor at 67 °C | 30% | 0.98 | 37 | 3.15 | 11.76 |
| 40% | 1.76 | 53 | 2.51 | 21.12 | |
| 50% | 2.58 | 69 | 2.23 | 30.96 | |
| 60% | 3.31 | 83 | 2.09 | 39.72 | |
| 70% | 4.35 | 96 | 1.84 | 52.2 | |
| 80% | 5.46 | 114 | 1.74 | 65.52 | |
| 90% | 6.82 | 134 | 1.64 | 81.84 | |
| 100% | 8.33 | 157 | 1.57 | 99.96 |
Source: VCI spec sheet
11000KV on 2S, 8 V3 props
| Prop | Throttle | Current (A) | Thrust (g) | Efficiency (g/W) | Power (W) |
|---|---|---|---|---|---|
| GF 2512-3motor at 69 °C | 30% | 1.65 | 40 | 3.03 | 13.2 |
| 40% | 2.73 | 62 | 2.84 | 21.84 | |
| 50% | 3.66 | 78 | 2.66 | 29.28 | |
| 60% | 5.01 | 99 | 2.47 | 40.08 | |
| 70% | 6.02 | 115 | 2.39 | 48.16 | |
| 80% | 7.53 | 138 | 2.29 | 60.24 | |
| 90% | 9.27 | 151 | 2.04 | 74.16 | |
| 100% | 11.39 | 181 | 1.99 | 91.12 | |
| GF 2020-4motor at 72 °C | 30% | 1.75 | 38 | 2.71 | 14 |
| 40% | 2.88 | 57 | 2.47 | 23.04 | |
| 50% | 4.07 | 70 | 2.15 | 32.56 | |
| 60% | 5.35 | 84 | 1.96 | 42.8 | |
| 70% | 6.68 | 96 | 1.8 | 53.44 | |
| 80% | 8.12 | 110 | 1.69 | 64.96 | |
| 90% | 9.95 | 129 | 1.62 | 79.6 | |
| 100% | 12.1 | 149 | 1.54 | 96.8 | |
| GF 2023-3motor at 68 °C | 30% | 1.69 | 32 | 2.37 | 13.52 |
| 40% | 2.78 | 47 | 2.11 | 22.24 | |
| 50% | 4 | 60 | 1.88 | 32 | |
| 60% | 5.21 | 74 | 1.78 | 41.68 | |
| 70% | 6.51 | 90 | 1.73 | 52.08 | |
| 80% | 7.93 | 99 | 1.56 | 63.44 | |
| 90% | 9.53 | 116 | 1.52 | 76.24 | |
| 100% | 11.88 | 138 | 1.45 | 95.04 |
Source: VCI spec sheet
Inside the motor
A brushless outrunner: the coils stand still in the middle and the magnets spin around them. From the top down:
- Magnets. N52SH arc magnets. (VCI spec sheet)
How fast it spins
KV is the motor’s no-load speed per volt. With nothing on the shaft, the 11000KV 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 | 162,800 | 16,280 Hz | 97,680 |
| 4S full | 16.8 | 184,800 | 18,480 Hz | 110,880 |
| 6S nominal | 22.2 | 244,200 | 24,420 Hz | 146,520 |
| 6S full | 25.2 | 277,200 | 27,720 Hz | 166,320 |
A 12-pole rotor has 6 pole pairs, so every turn of the shaft is 6 electrical cycles, and a six-step ESC switches the phases 36 times per turn.
About the 3D model
A generic outrunner drawn from VCI’s published sizes: the 11 × 3 mm stator, 14.2 mm bell, 10.5 mm height, 1.5 mm shaft, 9 mm mounting circle and 9 teeth and 12 magnets. Anything VCI 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
- VCI Hobby: VCI SPARK 1103 MOTOR-7500KV/11000KV (2PCS) (product page). Retrieved Oct 19, 2026.
- VCI Hobby: Spark 1103 drawing (image on the product page’s Specifications tab). Retrieved Oct 19, 2026.
- VCI Hobby: Spark 1103 spec sheets and testing data for the 7500KV at 12 V and the 11000KV at 8 V, each on three Gemfan props (image on the product page’s Specifications tab). VCI’s temperature is the shaft’s after a run from 0 to 100% throttle; its voltage column, the same on every row of a table, is left out.. Retrieved Oct 19, 2026.
- VCI Hobby: Spark 1103 11000KV product photo (first gallery image). Retrieved Oct 19, 2026.
- VCI Hobby: Spark 1103 top-view photo (second gallery image). Retrieved Oct 19, 2026.
