1S–3S whoop and toothpick motor
GEPRC GR1102
A 3.2 g 1102 for whoops and toothpicks on 1S–3S; on GEPRC’s 8 V bench the 10000KV pulls 120 g at full throttle on a 65 mm two-blade and 86 g on a GF1635 four-blade.
- Whoops and toothpicks
- 1S–3S (9000KV on 2S, 10000KV on 2S–3S)
- 1.6-inch four-blade or 2.5-inch two-blade props
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 GEPRC’s published sizes, not its exact design. No-load speed is KV × 11.1 V, a nominal pack for this version. GEPRC’s bench tables for it step by thrust rather than throttle, so they are in the bench data below, not on this readout.
- Max thrust
- 120 g
- HQ 65 mm 2B prop, 8 V
- Weight
- 3.2 g
- GEPRC’s scale photo shows it with its lead and plug
- Peak current
- 7.3 A
- full throttle
- Max power
- 59 W
- full throttle
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What you get
120 g on 2S
The 10000KV pulled 120 g at full throttle on an HQ 65 mm two-blade at 8 V, drawing 7.29 A.
Source: GEPRC drawing and load table
Choice of base and shaft
Sold with a three-hole base (M1.4 on a 6.6 mm circle) or a four-hole base (M2 on a 9 mm circle), and with a 1 mm or 1.5 mm shaft.
Source: GEPRC product page, GEPRC version image, GEPRC drawing and load table
3.2 g
GEPRC weighs it at 3.2 g with its lead and plug.
Source: GEPRC product page, GEPRC weight image
What to pair it with
Our reading of GEPRC’s numbers, so your build matches what the motor was tested with.
- ESC
- GEPRC gives no ESC rating. Its tables peak at 5.83 A (9000KV), 7.29 A (10000KV) and 12.21 A (14000KV), all on the 65 mm two-blade at 8 V. (GEPRC drawing and load table)
- Props
- 1.6-inch four-blade or 2.5-inch two-blade. GEPRC suggests 2.5-inch two-blades for the 9000KV and 1.6-inch props for the 10000KV and 14000KV, and tested every KV on a GF1635 four-blade and an HQ 65 mm two-blade. (GEPRC product page, GEPRC version image, GEPRC drawing and load table)
- Battery
- 1S–3S LiPo or LiHV: 2S for the 9000KV, 2S–3S for the 10000KV, 1S for the 14000KV. (GEPRC product page, GEPRC version image)
- Frame
- Three M1.4 holes on a 6.6 mm circle or four M2 holes on a 9 mm circle; GEPRC made it for toothpick and whoop frames. (GEPRC product page, GEPRC drawing and load table)
Where to buy
- GEPRCthe maker’s store; 10000KV with a three-hole or four-hole base, or 11000KV with a three-hole base ($4.99, reduced from $9.99); all out of stock when checked$9.99seen Oct 19, 2026Visit
Plain links, not affiliate links. Prices change; the store’s page has the current one.
Full specs
| Spec | Value | Source |
|---|---|---|
| KV | 10,000 rpm/V (also 9000KV and 11000KV; GEPRC’s images also show a 14000KV) | GEPRC product page, GEPRC version image |
| Stator | 11 × 2 mm (1102) | GEPRC product page |
| Configuration | 9N12P (9 stator slots, 12 magnet poles) | GEPRC product page |
| Battery | 1S–3S LiPo or LiHV (GEPRC’s image rates the 9000KV for 2S, the 10000KV for 2S–3S and the 14000KV for 1S) | GEPRC product page, GEPRC version image |
| Weight | 3.2 g (GEPRC’s scale photo shows it with its lead and plug) | GEPRC product page, GEPRC weight image |
| Dimensions | φ13.8 × 14.3 mm with the shaft; 9.3 mm without it, with 5 mm of shaft above the bell (the spec list gives 13.8 × 15 mm) | GEPRC drawing and load table |
| Shaft | 1 mm or 1.5 mm, standing 5 mm above the bell; two M2 holes on a 5 mm circle in the top of the bell | GEPRC product page, GEPRC version image, GEPRC drawing and load table |
| Mounting | 3 × M1.4 holes on a 6.6 mm circle, or 4 × M2 holes on a 9 mm circle (GEPRC sells both bases) | GEPRC product page, GEPRC version image, GEPRC drawing and load table |
| Bearings | NSK (the spec list says NSK; a feature image on the same page says NMB (S3)) | GEPRC product page |
| In the box | 1 × GR1102 motor | GEPRC product page |
Bench data
Redrawn from GEPRC’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.
9000KV on 2S, 8 V2 props
| Prop | Step | Current (A) | Thrust (g) | Efficiency (g/W) | RPM | Power (W) |
|---|---|---|---|---|---|---|
| HQ 65 mm 2B | 2.96 | 70 | 2.92 | 32928 | 23.94 | |
| 3.51 | 80 | 2.81 | 35229 | 28.42 | ||
| 4.18 | 90 | 2.66 | 37307 | 33.83 | ||
| 4.92 | 100 | 2.51 | 39236 | 39.87 | ||
| 5.56 | 110 | 2.44 | 40837 | 45 | ||
| Max | 5.83 | 115 | 2.43 | 41528 | 47.26 | |
| GF1635 4B | 2.13 | 40 | 2.32 | 37608 | 17.24 | |
| 2.59 | 48 | 2.29 | 40974 | 21 | ||
| 3.06 | 56 | 2.26 | 43757 | 24.78 | ||
| 3.57 | 64 | 2.21 | 46535 | 28.95 | ||
| 4.17 | 72 | 2.13 | 49307 | 33.78 | ||
| Max | 4.41 | 76 | 2.13 | 50000 | 35.75 |
Source: GEPRC drawing and load table
10000KV on 2S–3S, 8 V2 props
| Prop | Step | Current (A) | Thrust (g) | Efficiency (g/W) | RPM | Power (W) |
|---|---|---|---|---|---|---|
| HQ 65 mm 2B | 3.42 | 70 | 2.53 | 34125 | 27.7 | |
| 4.02 | 80 | 2.46 | 36065 | 32.55 | ||
| 4.64 | 90 | 2.39 | 37981 | 37.58 | ||
| 5.57 | 100 | 2.22 | 40307 | 45.09 | ||
| 6.43 | 110 | 2.11 | 41533 | 52.09 | ||
| Max | 7.29 | 120 | 2.03 | 42636 | 59.04 | |
| GF1635 4B | 2.45 | 45 | 2.27 | 38692 | 19.86 | |
| 3.19 | 54 | 2.09 | 42854 | 25.83 | ||
| 4.01 | 63 | 1.94 | 47059 | 32.48 | ||
| 4.67 | 72 | 1.9 | 49403 | 37.82 | ||
| 5.33 | 81 | 1.88 | 51748 | 43.15 | ||
| Max | 5.66 | 86 | 1.87 | 52920 | 45.82 |
Source: GEPRC drawing and load table
14000KV on 1S, 8 V2 props
| Prop | Step | Current (A) | Thrust (g) | Efficiency (g/W) | Power (W) |
|---|---|---|---|---|---|
| HQ 65 mm 2B | 2.37 | 60 | 3.12 | 19.23 | |
| 3.79 | 80 | 2.6 | 30.72 | ||
| 5.67 | 100 | 2.18 | 45.95 | ||
| 8.69 | 120 | 1.71 | 70.37 | ||
| 10.55 | 140 | 1.64 | 85.47 | ||
| Max | 12.21 | 160 | 1.62 | 98.93 | |
| GF1635 4B | 3.91 | 60 | 1.9 | 31.64 | |
| 4.8 | 70 | 1.8 | 38.89 | ||
| 6.16 | 80 | 1.6 | 49.88 | ||
| 7.63 | 90 | 1.46 | 61.8 | ||
| 9.08 | 100 | 1.36 | 73.53 | ||
| Max | 10.47 | 110 | 1.3 | 84.81 |
Source: GEPRC drawing and load 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. Black, with a gunmetal cross-shaped top that carries two M2 holes. (GEPRC drawing and load table, GEPRC product photo)
- Stator. 11 × 2 mm, 9N12P. (GEPRC product page)
- Bearings. NSK bearings, per the spec list; a feature image says NMB. (GEPRC product page, GEPRC weight image)
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 GEPRC’s published sizes: the 11 × 2 mm stator, 13.8 mm bell, 9.3 mm height, 1.5 mm shaft, 6.6 mm mounting circle and 9 teeth and 12 magnets. Anything GEPRC 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
- GEPRC: GR1102 Motors (product page, with the spec list). Retrieved Oct 19, 2026.
- GEPRC: GR1102 9000KV, 10000KV and 14000KV with the battery and props GEPRC suggests for each, and the shaft and base options (image on the product page). Retrieved Oct 19, 2026.
- GEPRC: GR1102 bearing and weight, 3.2 g on a scale with its lead and plug (image on the product page). Retrieved Oct 19, 2026.
- GEPRC: GR1102 design engineering drawings (three-hole and four-hole versions) and load table for 9000KV, 10000KV and 14000KV at 8 V on a GF1635 4B and an HQ 65 mm 2B, in six steps from GEPRC’s 50% to its 100% throttle (image on the product page). GEPRC’s throttle column and the 14000KV’s rpm column are left out (see modelNotes).. Retrieved Oct 19, 2026.
- GEPRC: GR1102 product photo (first gallery image). Retrieved Oct 19, 2026.
- GEPRC: GR1102 motors with their leads, from above and below (gallery image). Retrieved Oct 19, 2026.
