5-inch ultralight and toothpick FPV motor
iFlight XING 2005
A 21 g motor iFlight made for ultralight and toothpick 5-inch builds of about 250 g: 1900KV for 6S, a 1.5 mm titanium-alloy shaft, and 1,030 g of pull on a 5-inch tri-blade on iFlight's 24 V bench.
- Ultralight and toothpick 5-inch builds of about 250 g
- 6S
- 5-inch props for a 1.5 mm shaft, such as iFlight's Nazgul 5030
The spin is an illustration: the model turns at 1/600 of the no-load speed, and it is a generic 2005 motor drawn from iFlight’s published sizes, not its exact design. Thrust, current and power are iFlight’s bench figures for the 5 × 3 × 3 prop at 24 V, read straight across between its throttle steps. Its data starts at 50% throttle.
- Max thrust
- 1,030 g
- 5 × 3 × 3 prop, 24 V
- Weight
- 21 g
- with wires
- Peak current
- 19.4 A
- full throttle
- Max power
- 465 W
- full throttle
from $20.99a motor at iFlight
A set of four: $83.96
Price seen Oct 19, 2026. Plain links: we earn nothing from them.
What it pulls
iFlight’s own bench test, one line per prop. Drag across the chart to move the throttle; the model above follows.
At 60% with the 5 × 3 × 3: 515 g of thrust, 6.8 A, 164 W, 3.13 g per watt.
On your quad
6.3 : 1
Thrust to weight at full throttle: four motors pull 4,120 g with the 5 × 3 × 3 at 24 V.
At 60% throttle they pull 2,060 g, 3.2 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 $20.99
Made for 250 g 5-inch builds
iFlight designed it for ultralight or toothpick 5-inch rigs of about 250 g.
Source: iFlight product page
21 g with wires
On a 20 × 5 mm stator with a φ26.8 mm bell, 15 mm tall without the shaft.
Titanium-alloy shaft
1.5 mm where it leaves the bell, for props with a 1.5 mm hole, and 3 mm inside the motor.
Source: iFlight product page
NSK bearings
Japanese NSK 8 × 3 × 4 mm bearings.
Source: iFlight product page
Curved N52H magnets
Arc-shaped N52H magnets, 14 poles on a 12-slot stator, with single-strand windings: 125.3 mΩ between phases.
Source: iFlight product page
Balanced, wires protected
Dynamically balanced, with the motor wires protected.
Source: iFlight product page
What to pair it with
Our reading of iFlight’s numbers, so your build matches what the motor was tested with.
- ESC
- Rated for at least 19.4 A, the peak iFlight measured at full throttle on a 5 × 3 tri-blade at 24 V. An ESC rated 25 A or more leaves room to spare. (iFlight 1900KV test report)
- Props
- iFlight tested it with a 5 × 3 tri-blade: 367 g at half throttle and 1,030 g at full. The page suggests iFlight's Nazgul 5030 or any other prop made for a 1.5 mm shaft. (iFlight product page, iFlight 1900KV test report)
- Battery
- 6S for the 1900KV; iFlight's bench run is at 24 V. The description pairs 4S with a 2550KV version that the page doesn't sell. (iFlight product page, iFlight 1900KV test report)
- Frame
- Four M2 holes on a 12 mm circle (sold as 12 × 12). Four M2×5 and four M2×7 screws come in the box. (iFlight product page, iFlight 1900KV test report)
Where to buy
- iFlightthe maker's store; one motor, 1900KV$20.99seen Oct 19, 2026Visit
Plain links, not affiliate links. Prices change; the store’s page has the current one.
Full specs
| Spec | Value | Source |
|---|---|---|
| KV | 1,900 rpm/V (the only KV the page sells; its description also names a 2550KV version for 4S) | iFlight product page |
| Stator | 20 × 5 mm (2005) | iFlight product page |
| Configuration | 12N14P (12 stator slots, 14 magnet poles) | iFlight product page |
| Battery | 6S LiPo (24 V) (the page title says 4–6S; its description pairs 4S with the 2550KV version) | iFlight product page |
| Weight | 21 g (with wires) | iFlight product page |
| Dimensions | φ26.8 × 19 mm (with shaft); body 15 mm tall | iFlight 1900KV test report |
| Shaft | 1.5 mm titanium alloy, protrudes 4 mm; 3 mm inside the motor | iFlight product page |
| Mounting | 4 × M2 holes (φ2 mm) on a 12 mm circle, sold as "12 × 12"; base plate 2 mm (iFlight's table says 12*12-φ2mm; its drawing dimensions the holes as 4-M2 on a φ12 circle) | iFlight 1900KV test report |
| Bell | segmented (iFlight's term) (the page's web address says unibell; its spec list and the test report say segmented bell) | iFlight 1900KV test report |
| Magnets | N52H, curved | iFlight product page |
| Bearings | NSK φ8 × φ3 × 4 mm | iFlight product page |
| Winding | single-strand copper | iFlight product page |
| Interphase resistance | 125.3 mΩ | iFlight product page |
| Peak current | 19.37 A (100% throttle, 5 × 3 × 3 prop, 24 V) | iFlight 1900KV test report |
| Max power | 464.9 W | iFlight 1900KV test report |
| Leads | 24 AWG, 160 mm | iFlight 1900KV test report |
| In the box | 4 × M2×5 screws, 4 × M2×7 screws | iFlight product page |
Bench data
Redrawn from iFlight’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.
1900KV on 6S, 24 V1 prop
| Prop | Throttle | Voltage (V) | Current (A) | Thrust (g) | Power (W) | Efficiency (g/W) |
|---|---|---|---|---|---|---|
| 5 × 3 × 3 (5-inch, three blades)motor at 75 °C | 50% | 24 | 4.72 | 367 | 113.3 | 3.239 |
| 60% | 24 | 6.85 | 515 | 164.4 | 3.133 | |
| 70% | 24 | 10.27 | 667 | 246.5 | 2.706 | |
| 80% | 24 | 13.92 | 798 | 334.1 | 2.389 | |
| 90% | 24 | 17.25 | 912 | 414 | 2.203 | |
| 100% | 24 | 19.37 | 1,030 | 464.9 | 2.216 |
Source: iFlight 1900KV 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. Segmented, in iFlight's words: φ26.8 mm and 10.55 mm tall, with 18 windows round the top and two M2 holes 6 mm apart in the hub. (iFlight 1900KV test report)
- Shaft. Titanium alloy, 1.5 mm where it protrudes 4 mm above the bell and 3 mm inside the motor. (iFlight product page)
- Magnets. Curved N52H magnets, 14 poles. (iFlight product page)
- Stator. 20 × 5 mm with 12 teeth, wound with single-strand copper; 24 AWG leads, 160 mm long. (iFlight 1900KV test report)
- Bearings. NSK, 8 × 3 × 4 mm. (iFlight product page)
- Base. 2 mm thick, with four M2 holes on a 12 mm circle. (iFlight 1900KV test report)
How fast it spins
KV is the motor’s no-load speed per volt. With nothing on the shaft, the 1900KV 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 | 28,120 | 3,281 Hz | 19,684 |
| 4S full | 16.8 | 31,920 | 3,724 Hz | 22,344 |
| 6S nominal | 22.2 | 42,180 | 4,921 Hz | 29,526 |
| 6S full | 25.2 | 47,880 | 5,586 Hz | 33,516 |
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 iFlight’s published sizes: the 20 × 5 mm stator, 26.8 mm bell, 15 mm height, 1.5 mm shaft, 12 mm mounting circle and 12 teeth and 14 magnets. Anything iFlight 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
- iFlight: XING 2005 4-6S FPV Motor (product page, with its product photos). Retrieved Oct 19, 2026.
- iFlight: XING 2005 1900KV test report (spec table, dimension drawing, thrust data). Retrieved Oct 19, 2026.
