3–3.5-inch cinewhoop and toothpick motor
Axisflying C204 2004
A 2004 for 3–3.5-inch cinewhoops, ultralight freestyle and toothpicks: 15 g with leads, 3500KV for 4S or 2650KV for 6S, and 908.7 g at full throttle on a GF D76R5B (3500KV).
- 3–3.5-inch cinewhoops, ultralight freestyle and toothpicks
- 4S (3500KV) or 6S (2650KV)
- 76 mm whoop props such as the GF D76R5B and HQ DT76X4
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 Axisflying’s published sizes, not its exact design. Thrust, current and power are Axisflying’s bench figures for the GF D76R5B prop at 16.02 V, read straight across between its throttle steps. Its data starts at 30% throttle.
- Max thrust
- 909 g
- GF D76R5B prop, 16.02 V
- Weight
- 15 g
- with leads (3500KV); 18.36 g (2650KV), 15.5 g (2910KV)
- Peak current
- 34.5 A
- full throttle
- Max power
- 534 W
- full throttle
from $19.90a motor at Axisflying
A set of four: $79.60
Price seen Oct 19, 2026. Plain links: we earn nothing from them.
What it pulls
Axisflying’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 D76R5B: 578 g of thrust, 14.5 A, 229 W, 2.53 g per watt.
On your quad
5.6 : 1
Thrust to weight at full throttle: four motors pull 3,635 g with the GF D76R5B at 16.02 V.
At 60% throttle they pull 2,313 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 $19.90
Light
15 g with leads for the 3500KV, 18.36 g for the 2650KV.
Two KVs in the store
Axisflying sells the 3500KV for 4S and the 2650KV for 6S, both at $19.90; its spec image also lists a 2910KV for 4–6S.
Source: Axisflying product page, Axisflying drawing, specs and test data
Bench numbers
On a GF D76R5B the 3500KV pulled 908.7 g at 34.49 A at about 15.5 V; on an HQ DT76X4 the 2650KV pulled 881.08 g at 23.27 A at about 23.7 V.
What to pair it with
Our reading of Axisflying’s numbers, so your build matches what the motor was tested with.
- ESC
- The 3500KV peaked at 34.49 A on 4S on Axisflying's bench; the 2650KV at 23.27 A on 6S. (Axisflying drawing, specs and test data)
- Props
- Axisflying tested the 3500KV and 2910KV on GF D76R5B props and the 2650KV on an HQ DT76X4. (Axisflying drawing, specs and test data)
- Battery
- 4S for the 3500KV, 6S for the 2650KV. (Axisflying drawing, specs and test data)
- Frame
- Four M2 screws on a 12 mm circle; four M2×5 screws come in the box. (Axisflying product page, Axisflying drawing, specs and test data)
Where to buy
- Axisflyingthe maker's store; same price for 3500KV and 2650KV$19.90seen Oct 19, 2026Visit
Plain links, not affiliate links. Prices change; the store’s page has the current one.
Full specs
| Spec | Value | Source |
|---|---|---|
| KV | 3,500 rpm/V (also 2650KV; Axisflying's spec image adds a 2910KV, which its store doesn't sell) | Axisflying product page, Axisflying drawing, specs and test data |
| Stator | 20 × 4 mm (2004) (from the 2004 in Axisflying's name) | Axisflying product page |
| Configuration | 12N14P (12 stator slots, 14 magnet poles) | Axisflying drawing, specs and test data |
| Battery | 4S LiPo (for the 3500KV; 6S for the 2650KV, 4–6S for the 2910KV) | Axisflying drawing, specs and test data |
| Weight | 15 g (with leads (3500KV); 18.36 g (2650KV), 15.5 g (2910KV)) | Axisflying drawing, specs and test data |
| Dimensions | φ24.7 × 17.4 mm, with 3 mm of shaft above the bell | Axisflying drawing, specs and test data |
| Shaft | 1.5 mm, protrudes 3 mm; 4 × M2 prop holes on a 5 mm circle in the top | Axisflying drawing, specs and test data |
| Mounting | 4 × M2 on a 12 mm circle | Axisflying drawing, specs and test data |
| Internal resistance | 55 mΩ (106.5 mΩ (2650KV), 102 mΩ (2910KV)) | Axisflying drawing, specs and test data |
| Max current | 34.5 A (the bench gives 34.49 A at full throttle on a GF D76R5B at about 15.5 V; 23.27 A (2650KV), 31.6 A (2910KV)) | Axisflying drawing, specs and test data |
| Max power | 533.6 W (550.69 W (2650KV), 745.1 W (2910KV)) | Axisflying drawing, specs and test data |
| Leads | 20 AWG silicone, 150 mm | Axisflying drawing, specs and test data |
| In the box | 1 motor, 4 × M2×5 motor screws, 1 × M2×4 shaft-lock screw, 2 × M2×7 prop screws, 1 O-ring, 1 washer | Axisflying product page, Axisflying drawing, specs and test data |
Bench data
Redrawn from Axisflying’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.
2650KV on 6S, 24.01 V1 prop
| Prop | Throttle | Voltage (V) | Current (A) | Thrust (g) | RPM | Power (W) | Efficiency (g/W) |
|---|---|---|---|---|---|---|---|
| HQ DT76X4 | 30% | 24.01 | 1.48 | 109.24 | 17143 | 35.53 | 3.07 |
| 40% | 23.98 | 2.91 | 186.05 | 22147 | 69.8 | 2.67 | |
| 50% | 23.95 | 5.05 | 278.87 | 27015 | 120.88 | 2.31 | |
| 60% | 23.92 | 7.71 | 374.54 | 30943 | 184.49 | 2.03 | |
| 70% | 23.86 | 10.2 | 470.32 | 34627 | 243.41 | 1.93 | |
| 80% | 23.78 | 13.92 | 606.39 | 39306 | 330.92 | 1.83 | |
| 90% | 23.72 | 18.92 | 773.67 | 44070 | 448.87 | 1.72 | |
| 100% | 23.67 | 23.27 | 881.08 | 47167 | 550.69 | 1.6 |
2910KV on 4S–6S, 24.04 V1 prop
| Prop | Throttle | Voltage (V) | Current (A) | Thrust (g) | RPM | Power (W) | Efficiency (g/W) |
|---|---|---|---|---|---|---|---|
| GF D76R5B | 30% | 24.04 | 3.61 | 266.5 | 17494 | 86.78 | 3.07 |
| 40% | 24.01 | 6.4 | 430.3 | 22278 | 153.66 | 2.8 | |
| 50% | 23.96 | 9.82 | 581.7 | 26404 | 235.29 | 2.47 | |
| 60% | 23.89 | 13.6 | 660.5 | 30553 | 324.9 | 2.03 | |
| 70% | 23.84 | 16.71 | 735 | 33548 | 398.37 | 1.85 | |
| 80% | 23.74 | 21.59 | 798 | 37195 | 512.55 | 1.56 | |
| 90% | 23.67 | 27.11 | 840.2 | 41731 | 641.69 | 1.31 | |
| 100% | 23.55 | 31.64 | 895.7 | 44097 | 745.12 | 1.2 |
3500KV on 4S, 16.02 V1 prop
| Prop | Throttle | Voltage (V) | Current (A) | Thrust (g) | RPM | Power (W) | Efficiency (g/W) |
|---|---|---|---|---|---|---|---|
| GF D76R5B | 30% | 16.02 | 3.11 | 156.5 | 16547 | 49.82 | 3.14 |
| 40% | 15.96 | 5.9 | 272.7 | 21175 | 94.16 | 2.9 | |
| 50% | 15.89 | 9.64 | 414.7 | 24941 | 153.18 | 2.71 | |
| 60% | 15.78 | 14.5 | 578.3 | 28804 | 228.81 | 2.53 | |
| 70% | 15.75 | 19.04 | 630.3 | 31802 | 299.88 | 2.1 | |
| 80% | 15.66 | 22.19 | 682.8 | 34357 | 347.5 | 1.96 | |
| 90% | 15.59 | 28.39 | 770.4 | 38021 | 442.6 | 1.74 | |
| 100% | 15.47 | 34.49 | 908.7 | 40737 | 533.56 | 1.7 |
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 eight black spokes on the top and red Y-shaped ribs in four of its windows. (Axisflying product photo, Axisflying top-view photo)
- Shaft. 1.5 mm, standing 3 mm above the bell; props fix to four M2 holes on a 5 mm circle in the top, and a small M2×4 screw locks the shaft. (Axisflying product page, Axisflying drawing, specs and test data)
- Stator. 20 × 4 mm, 12 slots, with 14 magnet poles in the bell. (Axisflying product page, Axisflying drawing, specs and test data)
- Leads. 20 AWG silicone wire, 150 mm. (Axisflying drawing, specs and test data)
How fast it spins
KV is the motor’s no-load speed per volt. With nothing on the shaft, the 3500KV 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 | 51,800 | 6,043 Hz | 36,260 |
| 4S full | 16.8 | 58,800 | 6,860 Hz | 41,160 |
| 6S nominal | 22.2 | 77,700 | 9,065 Hz | 54,390 |
| 6S full | 25.2 | 88,200 | 10,290 Hz | 61,740 |
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 Axisflying’s published sizes: the 20 × 4 mm stator, 24.7 mm bell, 14.4 mm height, 1.5 mm shaft, 12 mm mounting circle and 12 teeth and 14 magnets. Anything Axisflying 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
- Axisflying: Motor C204 4-6s (product page). Retrieved Oct 19, 2026.
- Axisflying: Cine204 intro, outline drawing, spec tables (2910KV, 2650KV, 3500KV), testing data for 2910KV and 3500KV on GF D76R5B props and 2650KV on an HQ DT76X4, and product list (one long image on the product page). Each row's voltage is as measured; the table's voltage is its 30% row.. Retrieved Oct 19, 2026.
- Axisflying: C204 main product photo (marked 2910KV), used for finish. Retrieved Oct 19, 2026.
- Axisflying: C204 top view (product photo), used for the spoke count. Retrieved Oct 19, 2026.