1S tiny whoop motor
HappyModel EX0802
A 1.7 g one-piece-bell motor for 1S whoops such as HappyModel's Mobula6: an 8 × 2 mm stator, two E-clips on a 1 mm shaft, and 29.3 g of thrust per motor on HappyModel's 3.7 V bench (19000KV, 40 mm four-blade).
- Mobula6 and Mobula6 HD
- 1S tiny whoops (19000KV, 22000KV, 25000KV)
- 1S–2S (14000KV)
The spin is an illustration: the model turns at 1/600 of the no-load speed, and it is a generic 0802 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’s bench tables for it step by thrust rather than throttle, so they are in the bench data below, not on this readout.
- Weight
- 1.7 g
Plain links: we earn nothing from them.
What you get
One-piece bell
HappyModel labels every version "One-Piece Design".
Source: HappyModel product page
1.7 g
HappyModel lists 1.7 g per motor.
Source: HappyModel product page
Double E-clip
Two E-clips on the shaft, which HappyModel says keep the bell from flying off.
Source: HappyModel product page
For the Mobula6
HappyModel sells it as the new-series motor for its Mobula6 and Mobula6 HD.
Source: HappyModel product page
What to pair it with
Our reading of HappyModel’s numbers, so your build matches what the motor was tested with.
- ESC
- HappyModel's bench tops out at 4.97 A (22000KV), 4.53 A (25000KV) and 4.09 A (19000KV), each with a 40 mm four-blade prop. A 1S whoop board rated 5 A per motor or more covers them. (HappyModel product page)
- Props
- HappyModel tested a Gemfan 1219 (31 mm) and its own 40 mm four-blade props. (HappyModel product page)
- Battery
- 1S only for 19000KV, 22000KV and 25000KV; 1S–2S for 14000KV. (HappyModel product page)
- Connector
- A JST 1.25 mm plug on 27 mm leads (40 mm on the 22000KV). (HappyModel product page)
Where to buy
- RaceDayQuads19000KV, CWprice on the store’s pageVisit
- RaceDayQuads25000KV, CWprice on the store’s pageVisit
- Pyrodrone19000KVprice on the store’s pageVisit
- GetFPV19000KV, CCWprice 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 | 19,000 rpm/V (also 14000KV, 22000KV and 25000KV) | HappyModel product page |
| Stator | 8 × 2 mm (0802) | HappyModel product page |
| Configuration | 9N12P (9 stator slots, 12 magnet poles) | HappyModel product page |
| Battery | 1S LiPo only (19000KV) (22000KV and 25000KV: 1S only; 14000KV: 1S–2S) | HappyModel product page |
| Weight | 1.7 g | HappyModel product page |
| Dimensions | Φ10.5 × 14.9 mm | HappyModel product page |
| Shaft | 1 mm, held by two E-clips | HappyModel product page |
| Bell | one piece (HappyModel's "One-Piece Design") | HappyModel product page |
| No-load current | 0.45 A (19000KV at 2 V) | HappyModel product page |
| Peak current (bench) | 4.09 A (where HappyModel's 19000KV bench tops out: HappyModel 40 mm four-blade prop at 3.7 V) | HappyModel product page |
| Max power (bench) | 15.133 W (same row as the peak current) | HappyModel product page |
| Leads | 3 leads with a JST 1.25 mm plug: 27 mm with the plug (14000KV, 19000KV, 25000KV), 40 mm (22000KV) | HappyModel product page |
Bench data
Redrawn from HappyModel’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.
19000KV on 1S, 3.7 V2 props
| Prop | Step | Current (A) | Thrust (g) | Power (W) | Efficiency (g/W) |
|---|---|---|---|---|---|
| HappyModel 40 mm (4-blade) | 0.98 | 9.8 | 3.626 | 2.702702703 | |
| 2.06 | 18.4 | 7.622 | 2.41406455 | ||
| 2.96 | 23.4 | 10.952 | 2.136596056 | ||
| 4.09 | 29.3 | 15.133 | 1.936165995 | ||
| Gemfan 1219 (31 mm) | 0.97 | 8.8 | 3.589 | 2.451936473 | |
| 2.01 | 17.3 | 7.437 | 2.326206804 | ||
| 2.62 | 21.5 | 9.694 | 2.217866722 |
Source: HappyModel product page
22000KV on 1S, 3.7 V2 props
| Prop | Step | Current (A) | Thrust (g) | Power (W) | Efficiency (g/W) |
|---|---|---|---|---|---|
| HappyModel 40 mm (4-blade) | 1 | 9.5 | 3.7 | 2.567567568 | |
| 1.94 | 16.5 | 7.178 | 2.298690443 | ||
| 3 | 23.1 | 11.1 | 2.081081081 | ||
| 4.04 | 28.9 | 14.948 | 1.933369013 | ||
| 4.97 | 32.8 | 18.389 | 1.783675023 | ||
| Gemfan 1219 (31 mm) | 1.06 | 8.8 | 3.922 | 2.243753187 | |
| 1.94 | 14.8 | 7.178 | 2.06185567 | ||
| 3.05 | 21.7 | 11.285 | 1.922906513 | ||
| 3.68 | 24.9 | 13.616 | 1.828730905 |
Source: HappyModel product page
25000KV on 1S2 props
| Prop | Step | Current (A) | Thrust (g) | Power (W) | Efficiency (g/W) |
|---|---|---|---|---|---|
| Gemfan 1219 (31 mm)at 3.7 V | 1.03 | 8.4 | 3.811 | 2.204145893 | |
| 1.86 | 14 | 6.882 | 2.034292357 | ||
| 3.05 | 21.4 | 11.285 | 1.896322552 | ||
| 3.97 | 26.6 | 14.689 | 1.810878889 | ||
| 4.41 | 27.8 | 16.317 | 1.703744561 | ||
| HappyModel 40 mm (4-blade)at 2.6 V | 1.02 | 7.6 | 2.652 | 2.865761689 | |
| 1.99 | 13.2 | 5.174 | 2.551217627 | ||
| 2.99 | 18.9 | 7.774 | 2.431180859 | ||
| 3.98 | 23.4 | 10.348 | 2.261306533 | ||
| 4.53 | 25.2 | 11.778 | 2.139582272 |
Source: HappyModel 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:
- Bell. One piece (HappyModel's "One-Piece Design"), held on the 1 mm shaft by two E-clips. (HappyModel product page)
How fast it spins
KV is the motor’s no-load speed per volt. With nothing on the shaft, the 19000KV 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 | 281,200 | 28,120 Hz | 168,720 |
| 4S full | 16.8 | 319,200 | 31,920 Hz | 191,520 |
| 6S nominal | 22.2 | 421,800 | 42,180 Hz | 253,080 |
| 6S full | 25.2 | 478,800 | 47,880 Hz | 287,280 |
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 8 × 2 mm stator, 10.5 mm bell, 1 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: EX0802 new series brushless motor for Mobula6 and Mobula6 HD (product page, spec list and bench data). Retrieved Oct 19, 2026.
- HappyModel: EX0802 main product photo, used for finish. Retrieved Oct 19, 2026.
- HappyModel: EX0802 product photo showing the top of the bell, used to count its windows. Retrieved Oct 19, 2026.
