2S micro whoop motor
HappyModel RS1102
A 2.8 g motor on an 11 × 2 mm stator with a 1.5 mm shaft, recommended for 2S; the 10000KV is the original motor of HappyModel's Mobula7 O4.
- Mobula7 O4 (10000KV)
- 2S micro builds
The spin is an illustration: the model turns at 1/600 of the no-load speed, and it is a generic 1102 motor drawn from HappyModel’s published sizes, not its exact design. No-load speed is KV × 7.4 V, a nominal pack for this version. HappyModel publishes no bench data for it.
- Weight
- 2.8 g
Plain links: we earn nothing from them.
What you get
Mobula7 O4 motor
The 10000KV is the original motor of HappyModel's Mobula7 O4.
Source: HappyModel product page
2.8 g
HappyModel lists 2.8 g per motor.
Source: HappyModel product page
1.5 mm shaft
1.5 mm, standing 4 mm above the bell.
Source: HappyModel drawing
What to pair it with
Our reading of HappyModel’s numbers, so your build matches what the motor was tested with.
- Battery
- 2S LiPo, as HappyModel recommends. (HappyModel product page)
- Frame
- Three M1.4 screws on a 6.6 mm circle. (HappyModel drawing)
- Connector
- A 3-pin plug on 32 mm leads. (HappyModel drawing)
Where to buy
- GetFPV13500KV, 4-packprice 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 | 10,000 rpm/V (also 13500KV) | HappyModel product page |
| Stator | 11 × 2 mm (1102) | HappyModel product page |
| Configuration | 9N12P (9 stator slots, 12 magnet poles) | HappyModel product page |
| Battery | 2S LiPo (HappyModel's recommendation) | HappyModel product page |
| Weight | 2.8 g | HappyModel product page |
| Dimensions | φ13.5 × 14 mm (with shaft); 8.8 mm from the base to the top of the bell | HappyModel drawing |
| Shaft | 1.5 mm, protrudes 4 mm above the bell | HappyModel drawing |
| Mounting | 3 × M1.4 holes on a 6.6 mm circle | HappyModel drawing |
| Leads | 3 leads, 32 ± 2 mm, with a 3-pin plug | HappyModel drawing |
Inside the motor
A brushless outrunner: the coils stand still in the middle and the magnets spin around them. From the top down:
- Shaft. 1.5 mm, protrudes 4 mm above the bell. (HappyModel drawing)
- Stator. The coils are wound on a stack of thin steel laminations: 11 × 2 mm (1102). (HappyModel product page)
- Base. 3 × M1.4 holes on a 6.6 mm circle. (HappyModel drawing)
How fast it spins
KV is the motor’s no-load speed per volt. With nothing on the shaft, the 10000KV 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 | 148,000 | 14,800 Hz | 88,800 |
| 4S full | 16.8 | 168,000 | 16,800 Hz | 100,800 |
| 6S nominal | 22.2 | 222,000 | 22,200 Hz | 133,200 |
| 6S full | 25.2 | 252,000 | 25,200 Hz | 151,200 |
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 11 × 2 mm stator, 13.5 mm bell, 8.8 mm height, 1.5 mm shaft, 6.6 mm mounting circle 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: RS1102 KV10000 KV13500 brushless motor for micro FPV drone (product page, spec list). Retrieved Oct 19, 2026.
- HappyModel: RS1102 KV10000 dimension drawing (image on the product page). Retrieved Oct 19, 2026.
- HappyModel: RS1102 main product photo, used for finish. Retrieved Oct 19, 2026.
- HappyModel: RS1102 photo of the top of the bell, used to count its spokes. Retrieved Oct 19, 2026.
