5-inch FPV racing motor
Xnova Black Thunder 2207
Xnova's Black Thunder 2207 for 5-inch racing on 5–6S: 2100KV and 31.7 g; on Xnova's 22.2 V bench it pulls 1675 g at 41 A on a Gemfan 51366.
- 5-inch racing
- 5S–6S
- M5 props on a 16 × 16 frame mount
The spin is an illustration: the model turns at 1/600 of the no-load speed, and it is a generic 2207 motor drawn from Xnova’s published sizes, not its exact design. Thrust, current and power are Xnova’s bench figures for the GF51366 prop at 22.2 V, read straight across between its throttle steps. Its data starts at 10% throttle.
- Max thrust
- 1,675 g
- GF51366 prop, 22.2 V
- Weight
- 31.7 g
- with 16 cm wires
- Peak current
- 41.0 A
- full throttle
- Max power
- 910 W
- full throttle
from $36.99a motor at Pyrodrone
A set of four: $147.96
Price seen Oct 19, 2026. Plain links: we earn nothing from them.
What it pulls
Xnova’s own bench test, one line per prop. Drag across the chart to move the throttle; the model above follows.
At 60% with the GF51366: 1,022 g of thrust, 22.0 A, 488 W, 2.09 g per watt.
On your quad
10.3 : 1
Thrust to weight at full throttle: four motors pull 6,700 g with the GF51366 at 22.2 V.
At 60% throttle they pull 4,088 g, 6.3 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 $36.99
1675 g on 6S
On Xnova's 22.2 V bench it pulls 1675 g at 41 A (910.2 W) on a Gemfan 51366.
Source: Xnova prop test
Made for racing
Xnova recommends it for racing and lists high torque and fast response.
Source: Xnova product page
Smooth and balanced
Xnova lists low cogging torque and smooth running, and says the motors are precisely balanced and fully tested.
Source: Xnova product page
What to pair it with
Our reading of Xnova’s numbers, so your build matches what the motor was tested with.
- ESC
- Xnova's full-throttle current is 41 A at 22.2 V on a Gemfan 51366; pick an ESC rated above that per motor. (Xnova prop test)
- Props
- Xnova tested it on a Gemfan 51366 5.1-inch prop. (Xnova prop test)
- Battery
- 5–6S, as Xnova rates it; its bench test is on 22.2 V (6S). (Xnova data list, Xnova prop test)
- Frame
- Four M3 screws, opposite holes 16 mm apart (the 16 × 16 pattern). (Xnova drawing)
Where to buy
- Pyrodrone2100KV$36.99seen Oct 19, 2026Visit
Plain links, not affiliate links. Prices change; the store’s page has the current one.
Full specs
| Spec | Value | Source |
|---|---|---|
| KV | 2,100 rpm/V (the only KV (BT 07-21)) | Xnova data list |
| Stator | 22 × 7 mm (2207) (from the size in Xnova's name) | Xnova product page |
| Battery | 5S–6S LiPo | Xnova data list |
| Weight | 31.7 g (with 16 cm wires) | Xnova data list |
| Dimensions | φ27 × 31.6 mm (with shaft); body 19 mm tall | Xnova drawing |
| Shaft | M5, standing 12.6 mm above the bell | Xnova drawing |
| Mounting | 4 × M3, opposite holes 16 mm apart (16 × 16); base 3.2 mm thick | Xnova drawing |
| Resistance | 56 mΩ | Xnova data list |
| No-load current | 1.4 A (at 10 V) | Xnova data list |
| Peak current | 41 A (100% throttle, Gemfan 51366, 22.2 V) | Xnova prop test |
| Max power | 910.2 W (same test) | Xnova prop test |
| Leads | 16 cm | Xnova data list |
Bench data
Redrawn from Xnova’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.
2100KV on 5S–6S, 22.2 V1 prop
| Prop | Throttle | Current (A) | Thrust (g) | Power (W) | Efficiency (g/W) |
|---|---|---|---|---|---|
| GF51366 (Gemfan 51366) | 10% | 2.3 | 181 | 51.06 | 3.54 |
| 20% | 5.5 | 393 | 122.1 | 3.22 | |
| 30% | 9.9 | 576 | 219.78 | 2.62 | |
| 40% | 13.8 | 738 | 306.36 | 2.41 | |
| 50% | 17.9 | 885 | 397.38 | 2.23 | |
| 60% | 22 | 1,022 | 488.4 | 2.09 | |
| 70% | 25 | 1,136 | 555 | 2.05 | |
| 80% | 28.5 | 1,285 | 632.7 | 2.03 | |
| 90% | 36.1 | 1,513 | 801.42 | 1.89 | |
| 100% | 41 | 1,675 | 910.2 | 1.84 |
Source: Xnova prop test
Inside the motor
A brushless outrunner: the coils stand still in the middle and the magnets spin around them. From the top down:
- Bell. Black, with red cut faces on the top's six spokes and a red hub round the shaft. (Xnova product photo)
- Shaft. M5, standing 12.6 mm above the bell. (Xnova drawing)
- Base. 3.2 mm thick, with four M3 holes, opposite holes 16 mm apart. (Xnova drawing)
- Leads. 16 cm. (Xnova data list)
How fast it spins
KV is the motor’s no-load speed per volt. With nothing on the shaft, the 2100KV 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 | 31,080 | 3,626 Hz | 21,756 |
| 4S full | 16.8 | 35,280 | 4,116 Hz | 24,696 |
| 6S nominal | 22.2 | 46,620 | 5,439 Hz | 32,634 |
| 6S full | 25.2 | 52,920 | 6,174 Hz | 37,044 |
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 Xnova’s published sizes: the 22 × 7 mm stator, 27 mm bell, 19 mm height, 5 mm shaft and 16 mm mounting circle. Anything Xnova 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
- Xnova: NEW! Xnova Black Thunder 2207-2100Kv racing motor (product page). Retrieved Oct 19, 2026.
- Xnova: Black Thunder Line 2207 data list, dated 2024-2-01 (image on the product page). Retrieved Oct 19, 2026.
- Xnova: Black Thunder 2207-2100KV propeller test data, dated 2024-2-01 (image on the product page). Retrieved Oct 19, 2026.
- Xnova: Black Thunder 2207 outline drawing (image on the product page). Retrieved Oct 19, 2026.
- Xnova: Black Thunder 2207 product photo (image on the product page), used for finish. Retrieved Oct 19, 2026.
- Xnova: Black Thunder 2207 top-view photo (image on the product page). Retrieved Oct 19, 2026.
