3–3.5-inch FPV motor
T-Motor Pacer P1804
A one-piece-bell motor for sub-250 g 3.5- and 4-inch builds, sold with a 1.5 mm T-mount or a 5 mm shaft: 3400KV for 4S, 2400KV for 6S.
- 3.5-inch freestyle on 4S (3400KV)
- 4-inch long range on 6S (2400KV)
- 3.5-inch ducted cinewhoops
The spin is an illustration: the model turns at 1/600 of the no-load speed, and it is a generic 1804 motor drawn from T-Motor’s published sizes, not its exact design. Thrust, current and power are T-Motor’s bench figures for the GF4023-3 prop at 16 V, read straight across between its throttle steps. Its data starts at 20% throttle.
- Max thrust
- 611 g
- GF4023-3 prop, 16 V
- Weight
- 14.9 g
- 3400KV with the 5 mm shaft and 150 mm leads; 14.3 g with the 1.5 mm shaft. 2400KV: 14.3 g (5 mm), 13.78 g (1.5 mm). 13.2 g without leads (S1)
- Peak current
- 20.2 A
- full throttle
- Max power
- 318 W
- full throttle
from $20.90a motor at T-Motor
A set of four: $83.60
Price seen Oct 19, 2026. Plain links: we earn nothing from them.
What it pulls
T-Motor’s own bench test, one line per prop. Drag across the chart to move the throttle; the model above follows.
At 60% with the GF4023-3: 275 g of thrust, 8.6 A, 138 W, 2.00 g per watt.
On your quad
3.8 : 1
Thrust to weight at full throttle: four motors pull 2,446 g with the GF4023-3 at 16 V.
At 60% throttle they pull 1,098 g, 1.7 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 $20.90
One-piece bell
The Pacer line's Unibell, which T-Motor says is more durable.
Source: T-Motor product page
Two shafts
Sold with a 1.5 mm shaft for T-mount props or a 5 mm threaded shaft for props with a nut.
Source: T-Motor product page
13.2 g
13.2 g without leads; 13.78–14.9 g with them, by KV and shaft.
Source: T-Motor drawing and specs
Bench data for both KVs
Thrust, current, RPM and power in 20% steps on four props, at 24 V for the 2400KV and 16 V for the 3400KV.
Source: T-Motor test report
What to pair it with
Our reading of T-Motor’s numbers, so your build matches what the motor was tested with.
- ESC
- Peak current over 10 s is 20.2 A for the 3400KV and 16 A for the 2400KV, so an ESC rated for 20 A or more per motor covers both. (T-Motor drawing and specs)
- Props
- T-Motor benched both KVs on its 76s-3 and on Gemfan GF76-5, GF D90-3 and GF4023-3 props; at full throttle the 3400KV pulls 611.4 g on the GF4023-3 at 16 V. T-Hobby suggests 3.5-inch three-blades for the 3400KV and 4-inch props for the 2400KV. (T-Motor test report, T-Hobby product page)
- Battery
- 4S for the 3400KV, 6S for the 2400KV. T-Hobby suggests a 650–850 mAh 4S or a 750–850 mAh 6S pack. (T-Motor drawing and specs, T-Hobby product page)
- Frame
- 3.5-inch freestyle frames, 4-inch long-range frames or 3.5-inch ducted cinewhoops, per T-Hobby. Four M2 screws, opposite holes 12 mm apart. (T-Hobby product page, T-Motor drawing and specs)
Where to buy
- T-Motorthe maker's store (Tmotorhobby)$20.90seen Oct 19, 2026Visit
- T-HobbyT-Motor's hobby-brand store; price shown for 2400KV, 1.5 mm shaft$20.90seen Oct 19, 2026Visit
- NewBeeDrone5 mm shaft, 2400KV or 3400KVprice on the store’s pageVisit
- NewBeeDrone1.5 mm shaft, 2400KV or 3400KVprice on the store’s pageVisit
Plain links, not affiliate links. Prices change; the store’s page has the current one.
Full specs
| Spec | Value | Source |
|---|---|---|
| KV | 3,400 rpm/V (also 2400KV) | T-Motor drawing and specs |
| Stator | 18 × 4 mm (1804) | T-Hobby product page |
| Configuration | 12N14P (12 stator slots, 14 magnet poles) | T-Motor drawing and specs |
| Battery | 4S LiPo (2400KV: 6S) (a feature image on the same page says 3–4S whoops and toothpicks) | T-Motor drawing and specs |
| Weight | 14.9 g (3400KV with the 5 mm shaft and 150 mm leads; 14.3 g with the 1.5 mm shaft. 2400KV: 14.3 g (5 mm), 13.78 g (1.5 mm). 13.2 g without leads (S1)) | T-Motor drawing and specs |
| Dimensions | Φ22.9 × 25.2 mm with the 5 mm shaft, Φ22.9 × 16.3 mm with the 1.5 mm shaft (full length, shaft included) | T-Motor drawing and specs |
| Shaft | two versions: 5 mm with an M5 thread, protruding 11.8 mm, or 1.5 mm for T-mount props, protruding 2.9 mm; 2 mm inside the motor | T-Motor drawing and specs |
| Mounting | 4 × M2 holes, opposite holes 12 mm apart (12 × 12) | T-Motor drawing and specs |
| Bell | one piece (Unibell) | T-Motor product page |
| Idle current | 0.79 A (at 10 V, 5 mm shaft; 0.8 A with the 1.5 mm shaft. 2400KV: 0.51 A (5 mm), 0.45 A (1.5 mm)) | T-Motor drawing and specs |
| Peak current | 20.2 A (for 10 s; 16 A for 2400KV) | T-Motor drawing and specs |
| Max power | 318.3 W (for 10 s; 379.8 W for 2400KV) | T-Motor drawing and specs |
| Leads | 24 AWG; 150 mm on the 5 mm-shaft version, 110 mm on the 1.5 mm version | T-Motor drawing and specs |
| In the box | 1 × motor (1.5 mm or 5 mm shaft), 1 × parts bag | T-Motor product page |
Bench data
Redrawn from T-Motor’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.
2400KV on 6S, 24 V4 props
| Prop | Throttle | Voltage (V) | Current (A) | RPM | Thrust (g) | Power (W) | Efficiency (g/W) |
|---|---|---|---|---|---|---|---|
| GF4023-3 (Gemfan 4 × 2.3, 3-blade) | 20% | 24 | 0.9 | 13335 | 81.1 | 22 | 3.69 |
| 40% | 24 | 3.3 | 20065.7 | 198.4 | 77.9 | 2.55 | |
| 60% | 23.9 | 6.5 | 23910.5 | 294.2 | 154.3 | 1.91 | |
| 80% | 23.8 | 10 | 29283.6 | 454.8 | 237.8 | 1.91 | |
| 100% | 23.8 | 15.3 | 33571.8 | 618.8 | 364.4 | 1.7 | |
| GF D90-3 (Gemfan, 3-blade) | 20% | 24 | 1 | 12213.5 | 90.8 | 24.6 | 3.69 |
| 40% | 24 | 3.8 | 18229.7 | 196.3 | 91.7 | 2.14 | |
| 60% | 23.9 | 8 | 22668.5 | 295.7 | 189.9 | 1.56 | |
| 80% | 23.8 | 10.1 | 28576.3 | 460.4 | 240.6 | 1.91 | |
| 100% | 23.8 | 15.3 | 33091.2 | 609.6 | 363 | 1.68 | |
| GF76-5 (Gemfan, 5-blade) | 20% | 24 | 1 | 11920.2 | 74.3 | 24.9 | 2.98 |
| 40% | 23.9 | 3.6 | 18082.3 | 166.2 | 85.5 | 1.94 | |
| 60% | 23.9 | 7.6 | 22463.7 | 259.4 | 180.2 | 1.44 | |
| 80% | 23.8 | 10.9 | 27186.2 | 368.6 | 260.7 | 1.41 | |
| 100% | 23.7 | 16 | 31491.2 | 495.6 | 379.8 | 1.3 | |
| T-MOTOR 76s-3 (T-Motor, 3-blade) | 20% | 24 | 0.9 | 13037.8 | 69.4 | 22.3 | 3.11 |
| 40% | 24 | 3.3 | 19874.2 | 162.8 | 78.8 | 2.07 | |
| 60% | 23.9 | 6.5 | 23984.5 | 238.7 | 154 | 1.55 | |
| 80% | 23.8 | 10 | 29372.1 | 359 | 238.8 | 1.5 | |
| 100% | 23.8 | 15.4 | 34307.2 | 492.5 | 365.5 | 1.35 |
Source: T-Motor test report
3400KV on 4S, 16 V4 props
| Prop | Throttle | Voltage (V) | Current (A) | RPM | Thrust (g) | Power (W) | Efficiency (g/W) |
|---|---|---|---|---|---|---|---|
| GF4023-3 (Gemfan 4 × 2.3, 3-blade) | 20% | 16.1 | 1.2 | 12554 | 72.5 | 19.1 | 3.79 |
| 40% | 16 | 4.1 | 19217.7 | 186.6 | 65.6 | 2.84 | |
| 60% | 16 | 8.6 | 23136.3 | 274.6 | 137.6 | 2 | |
| 80% | 15.9 | 12.5 | 28743.3 | 437.5 | 198.5 | 2.2 | |
| 100% | 15.8 | 20.2 | 33346.9 | 611.4 | 318.3 | 1.92 | |
| GF D90-3 (Gemfan, 3-blade) | 20% | 16.1 | 1.5 | 10384.7 | 74 | 24.7 | 2.99 |
| 40% | 16 | 4.3 | 16501.4 | 184.7 | 69.1 | 2.67 | |
| 60% | 16 | 8.4 | 21408.9 | 264.4 | 133.8 | 2.26 | |
| 80% | 15.9 | 14.9 | 25717.8 | 428.4 | 236.4 | 1.81 | |
| 100% | 15.8 | 22.3 | 30173 | 584.5 | 351.7 | 1.66 | |
| GF76-5 (Gemfan, 5-blade) | 20% | 16.1 | 1.4 | 11025 | 59.6 | 22.8 | 2.61 |
| 40% | 16 | 4 | 17226.1 | 147.3 | 64 | 2.3 | |
| 60% | 16 | 8.1 | 22100.2 | 243.5 | 129 | 1.89 | |
| 80% | 15.9 | 14 | 26726.7 | 355.2 | 221.5 | 1.6 | |
| 100% | 15.8 | 21.5 | 31484.6 | 491.8 | 338.4 | 1.45 | |
| T-MOTOR 76s-3 (T-Motor, 3-blade) | 20% | 16.1 | 1.2 | 12186.9 | 58.7 | 19.6 | 2.99 |
| 40% | 16 | 4.1 | 18906 | 143.5 | 65.9 | 2.18 | |
| 60% | 15.9 | 8.8 | 22820.6 | 211.5 | 139.7 | 1.51 | |
| 80% | 15.9 | 12.6 | 28773.7 | 339.1 | 199.8 | 1.7 | |
| 100% | 15.8 | 20 | 33785.1 | 467.7 | 315.1 | 1.48 |
Source: T-Motor 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. One piece, 22.9 mm across, with five spokes in the top that fork into an X at the rim. (T-Motor drawing and specs)
- Shaft. 2 mm inside the motor. It leaves the bell either as a 5 mm shaft with an M5 thread, 11.8 mm long, or as a 1.5 mm pin 2.9 mm long with four M2 holes round it in the top for T-mount props. (T-Motor drawing and specs)
- Stator. 18 mm across and 4 mm tall, 12 slots under 14 magnet poles (12N14P). (T-Hobby product page)
- Base. Four M2 holes, opposite holes 12 mm apart; three 24 AWG leads, 150 mm long on the 5 mm version and 110 mm on the 1.5 mm version. (T-Motor drawing and specs)
How fast it spins
KV is the motor’s no-load speed per volt. With nothing on the shaft, the 3400KV 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 | 50,320 | 5,871 Hz | 35,224 |
| 4S full | 16.8 | 57,120 | 6,664 Hz | 39,984 |
| 6S nominal | 22.2 | 75,480 | 8,806 Hz | 52,836 |
| 6S full | 25.2 | 85,680 | 9,996 Hz | 59,976 |
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 T-Motor’s published sizes: the 18 × 4 mm stator, 22.9 mm bell, 13.4 mm height, 5 mm shaft, 12 mm mounting circle and 12 teeth and 14 magnets. Anything T-Motor 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
- T-Motor: Pacer P1804 product page on its Tmotorhobby store (price; feature notes, drawing, spec table, test report and contents are images on the page). Retrieved Oct 19, 2026.
- T-Motor: P1804 product drawing (5 mm and 1.5 mm shaft versions) and spec table (image on the product page, S1). Retrieved Oct 19, 2026.
- T-Motor: P1804 test report, two images on the product page (S1) starting with this one. Columns as T-Motor gives them: voltage measured per row, current, RPM, thrust in g, power, efficiency. Retrieved Oct 19, 2026.
- T-Hobby (T-Motor's hobby brand): Pacer P1804 product page (specifications, recommended setups, price). Retrieved Oct 19, 2026.