5-inch FPV freestyle motor
MEPS NEON 2505.5
A 5-inch freestyle motor on a wide 25 × 5.5 mm stator: 35 g with leads, N50H arc magnets and a 5 mm steel shaft, and 1718 g of thrust at full throttle on MEPS's 25.2 V bench (SZ5145).
- 5-inch freestyle with an action camera
- 6S
- 5-inch three-blade props (MEPS SZ5145)
The spin is an illustration: the model turns at 1/600 of the no-load speed, and it is a generic 2505.5 motor drawn from MEPS’s published sizes, not its exact design. Thrust, current and power are MEPS’s bench figures for the MEPS SZ5145 prop at 25.2 V, read straight across between its throttle steps. Its data starts at 10% throttle.
- Max thrust
- 1,718 g
- MEPS SZ5145 prop, 25.2 V
- Weight
- 35 g
- with 150 mm cable
- Peak current
- 45.3 A
- full throttle
- Max power
- 1,114 W
- full throttle
from $18.90a motor at MEPS
A set of four: $75.60
Price seen Oct 19, 2026. Plain links: we earn nothing from them.
What it pulls
MEPS’s own bench test, one line per prop. Drag across the chart to move the throttle; the model above follows.
At 60% with the MEPS SZ5145: 957 g of thrust, 15.8 A, 394 W, 2.40 g per watt.
On your quad
10.6 : 1
Thrust to weight at full throttle: four motors pull 6,872 g with the MEPS SZ5145 at 25.2 V.
At 60% throttle they pull 3,828 g, 5.9 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 $18.90
1718 g on 6S
On MEPS's 25.2 V bench with its SZ5145 prop it pulls 1718 g at full throttle, drawing 45.3 A.
Source: MEPS product page
Wide stator
A 25 × 5.5 mm stator with N50H arc magnets, which MEPS says gives the torque to carry an action camera.
Source: MEPS product page
Named materials
Pure copper wire with 220 °C enamel, a 5 mm steel shaft and a one-piece 6082 aluminium bell.
Source: MEPS product page
Tested on 4S too
At 16.8 V it pulls 1128 g with the SZ5145 and 1352 g with a T6143 at full throttle.
Source: MEPS product page
What to pair it with
Our reading of MEPS’s numbers, so your build matches what the motor was tested with.
- ESC
- MEPS's buying guide calls for a 45–60 A 4-in-1 ESC running BLHeli_32 or AM32. Its peak current is 45.3 A, the full-throttle draw of its 6S SZ5145 test. (MEPS product page)
- Props
- MEPS tested its SZ5145 three-blade prop on 6S and 4S, and a T6143 on 4S; its parts list also names the SZ4942, HQProp J37 and T-Hobby T5146. (MEPS product page)
- Battery
- 6S; MEPS's guide suggests a 1100–1400 mAh 100C or higher pack. (MEPS product page)
- Frame
- Four M3 screws on a 16 mm circle (16 × 16 mm); MEPS's guide asks for 5 or 6-inch frames with arms at least 5 mm thick. (MEPS size chart, MEPS product page)
Where to buy
- MEPSthe maker's store; $75.60 for four$18.90seen Oct 19, 2026Visit
Plain links, not affiliate links. Prices change; the store’s page has the current one.
Full specs
| Spec | Value | Source |
|---|---|---|
| KV | 2,000 rpm/V (the only KV sold) | MEPS product page |
| Stator | 25 × 5.5 mm (2505.5) | MEPS product page |
| Configuration | 12N14P (12 stator slots, 14 magnet poles) | MEPS product page |
| Battery | 6S LiPo (MEPS also tested it at 16.8 V (4S)) | MEPS product page |
| Weight | 35 g (with 150 mm cable) | MEPS product page |
| Dimensions | φ31.29 × 29.98 mm (with shaft); 17.35 mm from the base to the top of the bell; the base is 22 mm across | MEPS size chart |
| Shaft | 5 mm steel, M5 × 0.8 thread 8 mm long, protrudes 12.63 mm above the bell (the material is from MEPS's page (S1)) | MEPS size chart |
| Mounting | 4 × M3 holes on a 16 mm circle (16 × 16 mm) | MEPS size chart |
| Bell | 6082 aluminium, one piece ("Uni-Bell"), with reinforced struts | MEPS product page |
| Magnets | N50H arc magnets | MEPS product page |
| Winding | Pure copper wire with 220 °C enamel | MEPS product page |
| Internal resistance | 61 mΩ | MEPS product page |
| Idle current | 1.8 A (at most, at 10 V) | MEPS product page |
| Peak current | 45.3 A (MEPS's "Peak Current (60S)", the full-throttle row of its SZ5145 test at 25.2 V) | MEPS product page |
| Max power | 1,114 W (the same SZ5145 full-throttle row) | MEPS product page |
| Leads | 150 mm, with 10 mm of heat-shrink at the motor and 3 mm stripped ends | MEPS size chart |
| In the box | 1 × NEON 2505.5 motor | MEPS product page |
Bench data
Redrawn from MEPS’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.
2000KV on 6S3 props
| Prop | Throttle | Voltage (V) | Current (A) | RPM | Thrust (g) | Power (W) | Efficiency (g/W) |
|---|---|---|---|---|---|---|---|
| MEPS SZ5145 (3-blade)at 25.2 V | 10% | 25 | 1.1 | 5316 | 42 | 27 | 1.6 |
| 20% | 25 | 2 | 9837 | 158 | 51 | 3.1 | |
| 30% | 25 | 3.4 | 13736 | 315 | 85 | 3.7 | |
| 40% | 25 | 6.2 | 17217 | 495 | 157 | 3.2 | |
| 50% | 25 | 10 | 20529 | 709 | 251 | 2.8 | |
| 60% | 25 | 15.8 | 23522 | 957 | 394 | 2.4 | |
| 70% | 25 | 22.4 | 26175 | 1,204 | 558 | 2.2 | |
| 80% | 25 | 29.9 | 28321 | 1,414 | 741 | 1.9 | |
| 90% | 25 | 37.7 | 30232 | 1,610 | 933 | 1.7 | |
| 100% | 25 | 45.3 | 31520 | 1,718 | 1114 | 1.5 | |
| T6143at 16.8 V | 10% | 17 | 0.5 | 3553 | 26 | 8 | 3.2 |
| 20% | 17 | 1.2 | 6493 | 101 | 20 | 5.1 | |
| 30% | 17 | 2.4 | 8949 | 199 | 41 | 4.9 | |
| 40% | 17 | 4.4 | 11291 | 346 | 74 | 4.7 | |
| 50% | 17 | 7.5 | 13608 | 513 | 125 | 4.1 | |
| 60% | 17 | 11.7 | 15800 | 700 | 196 | 3.6 | |
| 70% | 17 | 16.9 | 17477 | 872 | 280 | 3.1 | |
| 80% | 17 | 22.5 | 19136 | 1,048 | 371 | 2.8 | |
| 90% | 16 | 28.9 | 20604 | 1,225 | 475 | 2.6 | |
| 100% | 16 | 38 | 21733 | 1,352 | 619 | 2.2 | |
| MEPS SZ5145 (3-blade)at 16.8 V | 10% | 17 | 0.4 | 3614 | 17 | 7 | 2.3 |
| 20% | 17 | 0.8 | 6737 | 66 | 14 | 4.7 | |
| 30% | 17 | 1.8 | 9709 | 149 | 30 | 4.9 | |
| 40% | 17 | 3.3 | 12284 | 250 | 55 | 4.5 | |
| 50% | 17 | 5.3 | 14735 | 366 | 89 | 4.1 | |
| 60% | 17 | 8.1 | 17132 | 505 | 136 | 3.7 | |
| 70% | 17 | 11.8 | 19254 | 650 | 197 | 3.3 | |
| 80% | 17 | 16.1 | 21405 | 811 | 267 | 3 | |
| 90% | 17 | 21.3 | 23367 | 974 | 353 | 2.8 | |
| 100% | 16 | 26.6 | 25041 | 1,128 | 439 | 2.6 |
Source: MEPS product page
Inside the motor
A brushless outrunner: the coils stand still in the middle and the magnets spin around them. From the top down:
- Shaft. 5 mm steel, M5 × 0.8 thread 8 mm long, protrudes 12.63 mm above the bell (the material is from MEPS's page (S1)). (MEPS size chart)
- Bell. 6082 aluminium, one piece ("Uni-Bell"), with reinforced struts. (MEPS product page)
- Magnets. N50H arc magnets. (MEPS product page)
- Stator. The coils are wound on a stack of thin steel laminations: 25 × 5.5 mm (2505.5). (MEPS product page)
- Winding. Pure copper wire with 220 °C enamel. (MEPS product page)
- Base. 4 × M3 holes on a 16 mm circle (16 × 16 mm). (MEPS size chart)
How fast it spins
KV is the motor’s no-load speed per volt. With nothing on the shaft, the 2000KV 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 | 29,600 | 3,453 Hz | 20,720 |
| 4S full | 16.8 | 33,600 | 3,920 Hz | 23,520 |
| 6S nominal | 22.2 | 44,400 | 5,180 Hz | 31,080 |
| 6S full | 25.2 | 50,400 | 5,880 Hz | 35,280 |
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 MEPS’s published sizes: the 25 × 5.5 mm stator, 31.29 mm bell, 17.35 mm height, 5 mm shaft, 16 mm mounting circle and 12 teeth and 14 magnets. Anything MEPS 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
- MEPS: NEON 2505.5 5″ FPV brushless motor 2000KV (product page with buying guide, spec table and data test as text, MEPS's own store). Retrieved Oct 19, 2026.
- MEPS: NEON 2505.5 size chart (image on the product page). Retrieved Oct 19, 2026.
- MEPS: NEON 2505.5 2000KV fluorescent pink, main product photo, used for finish. Retrieved Oct 19, 2026.