1S tiny whoop motor
HGLRC SPECTER 0802
A 2 g 0802 for 1S whoops: on HGLRC’s 3.7 V bench the 21000KV pulled up to 44 g on a GF1636×4, drawing 5.5 A.
- 1S tiny whoops
- 31 to 41 mm props
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 HGLRC’s published sizes, not its exact design. Thrust, current and power are HGLRC’s bench figures for the GF1636*4 prop at 3.7 V, read straight across between its throttle steps. Its data starts at 50% throttle.
- Max thrust
- 44 g
- GF1636*4 prop, 3.7 V
- Weight
- 2 g
- with leads, ±0.1 g
- Peak current
- 5.5 A
- full throttle
- Max power
- 20 W
- full throttle
from $11.99a motor at HGLRC
A set of four: $47.96
Price seen Oct 19, 2026. Plain links: we earn nothing from them.
What it pulls
HGLRC’s own bench test, one line per prop. Drag across the chart to move the throttle; the model above follows.
At 60% with the GF1636*4: 27 g of thrust, 2.4 A, 9 W, 3.45 g per watt.
On your quad
0.3 : 1
Thrust to weight at full throttle: four motors pull 176 g with the GF1636*4 at 3.7 V.
At 60% throttle they pull 109 g, 0.2 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 $11.99
44 g on 1S
The 21000KV pulled 44 g at full throttle on a GF1636×4 at 3.7 V, drawing 5.5 A.
Source: HGLRC spec sheet and table
2 g
2 g with its 35 mm leads, on three M1.4 screws on a 6.6 mm circle.
Source: HGLRC spec sheet and table
N52H arc magnets
Customised N52H arc magnets, which HGLRC says give strong magnetism and high torque.
Source: HGLRC product page
What to pair it with
Our reading of HGLRC’s numbers, so your build matches what the motor was tested with.
- ESC
- HGLRC asks for an ESC over 5 A; its spec image gives 5.5 A at most, and its tables peak at 5.5 A (GF1636×4). (HGLRC product page, HGLRC spec sheet and table)
- Props
- 31 to 41 mm. HGLRC’s GF1220 props pulled 36 g with three or four blades; the GF1635×3 and GF1636×4 pulled 41 g and 44 g. (HGLRC product page, HGLRC spec sheet and table)
- Battery
- 1S (3.7 V). (HGLRC spec sheet and table)
- Frame
- Three M1.4 holes on a 6.6 mm circle; four M1.4×3 mm screws come in the box. (HGLRC spec sheet and table)
Where to buy
- HGLRCthe maker’s store$11.99seen Oct 19, 2026Visit
Plain links, not affiliate links. Prices change; the store’s page has the current one.
Full specs
| Spec | Value | Source |
|---|---|---|
| KV | 21,000 rpm/V | HGLRC product page, HGLRC spec sheet and table |
| Stator | 8 × 2 mm (0802) (from the size in HGLRC’s name) | HGLRC spec sheet and table |
| Configuration | 9N12P (9 stator slots, 12 magnet poles) | HGLRC product page, HGLRC spec sheet and table |
| Battery | 1S LiPo (3.7 V) | HGLRC product page, HGLRC spec sheet and table |
| Weight | 2 g (with leads, ±0.1 g) | HGLRC product page, HGLRC spec sheet and table |
| Dimensions | φ11.22 × 8.2 mm, with 4.2 mm of shaft above the bell | HGLRC spec sheet and table |
| Shaft | 1 mm alloy steel, standing 4.2 mm above the bell | HGLRC spec sheet and table |
| Mounting | 3 × M1.4 holes on a 6.6 mm circle | HGLRC product page, HGLRC spec sheet and table |
| Bell | One-piece 7075 aluminium rotor, anodised in two colours | HGLRC product page |
| Magnets | N52H arc magnets | HGLRC product page, HGLRC spec sheet and table |
| Bearings | ISC (as HGLRC gives it) | HGLRC spec sheet and table |
| Winding | 200° high-temperature copper wire on a Kawasaki 1200 silicon-steel stator | HGLRC product page, HGLRC spec sheet and table |
| Max current | 5.5 A (from HGLRC’s spec image; the page text gives 12 A (5 s) and 88 W, the figures on HGLRC’s SPECTER 1202.5 page) | HGLRC spec sheet and table |
| Max power | 21.5 W | HGLRC spec sheet and table |
| Leads | 35 mm | HGLRC spec sheet and table |
| In the box | 4 × M1.4×3 mm screws | HGLRC spec sheet and table |
Bench data
Redrawn from HGLRC’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.
21000KV on 1S, 3.7 V4 props
| Prop | Throttle | Current (A) | Thrust (g) | Power (W) | Efficiency (g/W) |
|---|---|---|---|---|---|
| GF1636*4motor at 68 °C | 50% | 1.65 | 23 | 6.1 | 3.767 |
| 100% | 5.5 | 44 | 20.4 | 2.162 | |
| GF1635*3motor at 64 °C | 50% | 1.65 | 22 | 6.1 | 3.604 |
| 100% | 5.2 | 41 | 19.2 | 2.131 | |
| GF1220*3motor at 54 °C | 50% | 0.95 | 13 | 3.5 | 3.698 |
| 100% | 3.95 | 36 | 14.6 | 2.463 | |
| GF1220*4motor at 56 °C | 50% | 1.15 | 15 | 4.3 | 3.525 |
| 100% | 4.4 | 36 | 16.3 | 2.211 |
Source: HGLRC spec sheet and table
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 7075 aluminium rotor, anodised in two colours. (HGLRC product page)
- Magnets. Customised N52H arc magnets. (HGLRC product page, HGLRC spec sheet and table)
- Stator. 9N12P on Kawasaki 1200 silicon-steel laminations, wound with 200° high-temperature copper wire. (HGLRC product page, HGLRC spec sheet and table)
- Shaft and bearings. 1 mm alloy-steel shaft on ISC bearings. (HGLRC spec sheet and table)
How fast it spins
KV is the motor’s no-load speed per volt. With nothing on the shaft, the 21000KV 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 | 310,800 | 31,080 Hz | 186,480 |
| 4S full | 16.8 | 352,800 | 35,280 Hz | 211,680 |
| 6S nominal | 22.2 | 466,200 | 46,620 Hz | 279,720 |
| 6S full | 25.2 | 529,200 | 52,920 Hz | 317,520 |
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 HGLRC’s published sizes: the 8 × 2 mm stator, 11.22 mm bell, 8.2 mm height, 1 mm shaft, 6.6 mm mounting circle and 9 teeth and 12 magnets. Anything HGLRC 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
- HGLRC: SPECTER 0802 21000KV brushless motor (product page, with features, a spec list and price). Retrieved Oct 19, 2026.
- HGLRC: SPECTER 0802 long description image on the product page: spec list, drawing, efficacy table (four props at 3.7 V, 50% and 100% throttle, with one motor temperature per prop after 5 s at full throttle) and packing list. Retrieved Oct 19, 2026.
- HGLRC: SPECTER 0802 main product photo (first gallery image). Retrieved Oct 19, 2026.
- HGLRC: SPECTER 0802 side view (gallery image). Retrieved Oct 19, 2026.
