2.5-inch 4S cinewhoop motor
BetaFPV 1505
A 13.1 g motor for 4S 2.5-inch cinewhoops such as BetaFPV's Pavo25 V2: 482 g of thrust per motor at full throttle on a Gemfan D63 three-blade on BetaFPV's 16 V bench.
- 2.5-inch cinewhoops such as the Pavo25 V2
- 4S
- Gemfan D63 three-blade props (1.5 mm shaft)
The spin is an illustration: the model turns at 1/600 of the no-load speed, and it is a generic 1505 motor drawn from BetaFPV’s published sizes, not its exact design. Thrust, current and power are BetaFPV’s bench figures for the GF-D63-3B prop at 16 V, read straight across between its throttle steps. Its data starts at 30% throttle.
- Max thrust
- 482 g
- GF-D63-3B prop, 16 V
- Weight
- 13.1 g
- Peak current
- 20.8 A
- full throttle
- Max power
- 332 W
- full throttle
Plain links: we earn nothing from them.
What it pulls
BetaFPV’s own bench test, one line per prop. Drag across the chart to move the throttle; the model above follows.
At 60% with the GF-D63-3B: 197 g of thrust, 6.0 A, 96 W, 2.06 g per watt.
On your quad
3.0 : 1
Thrust to weight at full throttle: four motors pull 1,928 g with the GF-D63-3B at 16 V.
At 60% throttle they pull 788 g, 1.2 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
482 g on 4S
At full throttle on BetaFPV's 16 V bench it pulls 482 g on a Gemfan D63 three-blade, drawing 20.75 A.
Source: BetaFPV drawing and bench table
13.1 g
13.1 g with 34 mm of 24 AWG lead.
Source: BetaFPV product page
Made for the Pavo25 V2
BetaFPV designed it for 4S 2.5-inch quads, its Pavo25 V2 in particular, and pairs it with Gemfan D63 props for less noise.
Source: BetaFPV product page
What to pair it with
Our reading of BetaFPV’s numbers, so your build matches what the motor was tested with.
- ESC
- BetaFPV pairs it with its F722 35A AIO V2 flight controller. On its bench a motor draws up to 20.75 A at full throttle on 16 V. (BetaFPV product page, BetaFPV drawing and bench table)
- Props
- BetaFPV recommends Gemfan D63 three-blade props (1.5 mm shaft); its bench uses them. Props bolt to four M2 holes on a 5 mm circle. (BetaFPV product page, BetaFPV drawing and bench table)
- Battery
- 4S; BetaFPV suggests its LAVA 4S 850 mAh pack. (BetaFPV product page)
- Frame
- Four M2 screws on a 12 mm circle; BetaFPV names its Pavo25 V2. M2×5 and M2×7 screws come in the box. (BetaFPV product page)
Where to buy
- BETAFPVthe maker's store; 1 motor; sold out and tagged discontinued when checked$7.99seen Oct 19, 2026Visit
Plain links, not affiliate links. Prices change; the store’s page has the current one.
Full specs
| Spec | Value | Source |
|---|---|---|
| KV | 4,600 rpm/V | BetaFPV product page |
| Stator | 15 × 5 mm (1505) (from the size in BetaFPV's name) | BetaFPV product page |
| Battery | 4S LiPo | BetaFPV product page |
| Weight | 13.1 g | BetaFPV product page |
| Dimensions | φ21 × 18 mm (with shaft); body 14 mm tall | BetaFPV drawing and bench table, BetaFPV dimension photo |
| Shaft | 1.5 mm, protrudes 4 mm; 4 × M2 prop-mount holes on a 5 mm circle in the top | BetaFPV product page, BetaFPV drawing and bench table |
| Mounting | 4 × M2 holes, evenly spaced on a 12 mm circle | BetaFPV product page, BetaFPV drawing and bench table |
| Max current | 20.75 A (the full-throttle row of BetaFPV's 16 V bench test on a Gemfan D63 (S2)) | BetaFPV product page |
| Max power | 331.97 W | BetaFPV product page |
| Leads | 24 AWG, 34 mm | BetaFPV product page |
| In the box | 1 motor, 4 × M2×5 and 4 × M2×7 hex flat-head screws | BetaFPV product page |
Bench data
Redrawn from BetaFPV’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.
4600KV on 4S, 16 V1 prop
| Prop | Throttle | Voltage (V) | Current (A) | Power (W) | Thrust (g) | Efficiency (g/W) |
|---|---|---|---|---|---|---|
| GF-D63-3B (Gemfan D63, 3-blade) | 30% | 16 | 1.01 | 16.08 | 46 | 2.89 |
| 40% | 16 | 2.2 | 35.24 | 113 | 3.2 | |
| 50% | 16 | 4.02 | 64.33 | 156 | 2.43 | |
| 60% | 16 | 5.97 | 95.6 | 197 | 2.06 | |
| 70% | 16 | 9.08 | 145.29 | 238 | 1.64 | |
| 80% | 16 | 12.22 | 195.53 | 325 | 1.66 | |
| 90% | 16 | 15.93 | 254.8 | 422 | 1.66 | |
| 100% | 16 | 20.75 | 331.97 | 482 | 1.45 |
Source: BetaFPV drawing and bench 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. Blue anodised, with four spokes in an X across the top and black walls round its windows. (BetaFPV product page, BetaFPV top-view render)
- Shaft. 1.5 mm, standing 4 mm above the bell, with four M2 prop-mount holes on a 5 mm circle round it. (BetaFPV product page, BetaFPV drawing and bench table)
- Base. Four M2 holes evenly spaced on a 12 mm circle. (BetaFPV product page, BetaFPV drawing and bench table)
- Leads. 24 AWG wires, 34 mm long. (BetaFPV product page)
How fast it spins
KV is the motor’s no-load speed per volt. With nothing on the shaft, the 4600KV 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 | 68,080 | 7,943 Hz | 47,656 |
| 4S full | 16.8 | 77,280 | 9,016 Hz | 54,096 |
| 6S nominal | 22.2 | 102,120 | 11,914 Hz | 71,484 |
| 6S full | 25.2 | 115,920 | 13,524 Hz | 81,144 |
A 14-pole rotor has 7 pole pairs, so every turn of the shaft is 7 electrical cycles, and a six-step ESC switches the phases 42 times per turn.
About the 3D model
A generic outrunner drawn from BetaFPV’s published sizes: the 15 × 5 mm stator, 21 mm bell, 14 mm height, 1.5 mm shaft and 12 mm mounting circle. Anything BetaFPV 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
- BETAFPV: 1505 4600KV Brushless Motor (product page on BetaFPV's own store, tagged discontinued). Retrieved Oct 19, 2026.
- BETAFPV: 1505 4600KV outline drawing and load performance at 16 V on a Gemfan D63 three-blade (image on the product page). Retrieved Oct 19, 2026.
- BETAFPV: 1505 4600KV dimension photo: 21 mm across, 18 mm tall, 4 mm of 1.5 mm shaft, 34 mm leads (image on the product page). Retrieved Oct 19, 2026.
- BETAFPV: 1505 main product photo (side view), used for finish. Retrieved Oct 19, 2026.
- BETAFPV: 1505 product render (top and base), used for the top and spoke count. Retrieved Oct 19, 2026.
