1S tiny whoop motor
HappyModel RS1002
A 2.5 g, 20000KV motor on a 10 × 2 mm stator with a 1.5 mm shaft, for 1S only: the motor HappyModel fits to its Moblite7 Walksnail 75 mm whoop.
- Moblite7 Walksnail replacement
- 1S 75 mm whoops
- 40 mm props
The spin is an illustration: the model turns at 1/600 of the no-load speed, and it is a generic 1002 motor drawn from HappyModel’s published sizes, not its exact design. No-load speed is KV × 3.7 V, a nominal pack for this version. HappyModel publishes no bench data for it.
- Weight
- 2.5 g
from $14.49a motor at GetFPV
A set of four: $57.96
Price seen Oct 19, 2026. Plain links: we earn nothing from them.
What you get for $14.49
Moblite7 Walksnail motor
HappyModel fits four to its Moblite7 Walksnail, a 1S 75 mm whoop on its Mobula7 V4 frame.
2.5 g
HappyModel lists 2.5 g per motor.
1S only
HappyModel rates it for 1S LiPo only.
What to pair it with
Our reading of HappyModel’s numbers, so your build matches what the motor was tested with.
- ESC
- In the Moblite7 Walksnail V2.0, HappyModel runs four on the SuperbeeF4 Lite's 1S 4-in-1 ESC, rated 5 A per motor (6 A peak for 5 seconds). (HappyModel Moblite7 Walksnail page (motor block))
- Props
- 40 mm props with a 1.5 mm hole: HappyModel fits Gemfan 1635-3 props to the V2.0. (HappyModel Moblite7 Walksnail page (motor block))
- Battery
- 1S LiPo only. (HappyModel Moblite7 Walksnail page (motor block))
- Frame
- HappyModel mounts it on its Mobula7 V4 75 mm frame, with three screws per motor. (HappyModel Moblite7 Walksnail page (motor block), HappyModel photo (bottom))
Where to buy
- GetFPV20000KV, CW$14.49seen Oct 19, 2026Visit
Plain links, not affiliate links. Prices change; the store’s page has the current one.
Full specs
| Spec | Value | Source |
|---|---|---|
| KV | 20,000 rpm/V | HappyModel Moblite7 Walksnail page (motor block) |
| Stator | 10 × 2 mm (1002) | HappyModel Moblite7 Walksnail page (motor block) |
| Configuration | 9N12P (9 stator slots, 12 magnet poles) | HappyModel Moblite7 Walksnail page (motor block) |
| Battery | 1S LiPo only | HappyModel Moblite7 Walksnail page (motor block) |
| Weight | 2.5 g | HappyModel Moblite7 Walksnail page (motor block) |
| Dimensions | Φ13.5 × 12.5 mm (diameter × length) | HappyModel Moblite7 Walksnail page (motor block) |
| Shaft | 1.5 mm | HappyModel Moblite7 Walksnail page (motor block) |
Inside the motor
A brushless outrunner: the coils stand still in the middle and the magnets spin around them. From the top down:
- Bell. HappyModel's parts list calls it a Unibell brushless motor. (HappyModel Moblite7 Walksnail page (motor block))
How fast it spins
KV is the motor’s no-load speed per volt. With nothing on the shaft, the 20000KV 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 | 296,000 | 29,600 Hz | 177,600 |
| 4S full | 16.8 | 336,000 | 33,600 Hz | 201,600 |
| 6S nominal | 22.2 | 444,000 | 44,400 Hz | 266,400 |
| 6S full | 25.2 | 504,000 | 50,400 Hz | 302,400 |
A 12-pole rotor has 6 pole pairs, so every turn of the shaft is 6 electrical cycles, and a six-step ESC switches the phases 36 times per turn.
About the 3D model
A generic outrunner drawn from HappyModel’s published sizes: the 10 × 2 mm stator, 13.5 mm bell, 1.5 mm shaft and 9 teeth and 12 magnets. Anything HappyModel 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
- HappyModel: Moblite7 Walksnail 1S 75mm HD brushless whoop V2.0 version (the quad's product page; specs from the Motor block of its spec table, and its parts list). Retrieved Oct 19, 2026.
- HappyModel: Moblite7 Walksnail 1S 75mm digital HD brushless whoop V3 (the quad's product page; its Motor block gives the same specs under the name 1002 20000KV). Retrieved Oct 19, 2026.
- HappyModel: Moblite7 Walksnail V2.0 product photo showing a motor (RS1002 printed on the bell), used for finish. Retrieved Oct 19, 2026.
- HappyModel: Moblite7 Walksnail V2.0 photo from below, showing three screws on each motor. Retrieved Oct 19, 2026.
