BrotherHobby Avenger 2507 V2

What it pulls

BrotherHobby’s own bench test, one line per prop. Drag across the chart to move the throttle; the model above follows.

What you get

• About 2 kg on 6S

  On BrotherHobby’s 6S bench the 1200KV pulled 2,020 g at full throttle on an HQ 7 × 3.5 × 3 (33.4 A), and the 1850KV 2,003 g on an HQ 5 × 4.8 × 3 (43.3 A).

  Source: BrotherHobby 1200KV test report, BrotherHobby 1850KV test report

• 6.25 g/W at part throttle

  The 1200KV on a 7-inch tri-blade made 240 g at 30% throttle for 38.4 W, and 1,170 g at 70% for 336 W (3.48 g/W).

  Source: BrotherHobby 1200KV test report

• 40 g with leads

  BrotherHobby gives 40 g for every KV with 200 mm 18 AWG leads.

  Source: BrotherHobby product page, BrotherHobby 1850KV test report

• NMB bearings, N52H magnets

  Japanese NMB 9 × 4 × 4 mm bearings and N52H arc magnets, around a stator of 0.15 mm Nippon Steel silicon steel.

  Source: BrotherHobby product page

• Hipot and winding tests

  Each test report gives a dynamic-balance standard of 6 mg or less and a pass on a 500 V AC hipot test and an impulse winding test.

  Source: BrotherHobby 1750KV test report, BrotherHobby 1200KV test report, BrotherHobby 1850KV test report, BrotherHobby 1500KV test report, BrotherHobby 2200KV test report

What to pair it with

Our reading of BrotherHobby’s numbers, so your build matches what the motor was tested with.

ESC

BrotherHobby lists a 40 A ESC for the 1200KV, 45 A for the 1500KV on 5S, 40 A for the 1500KV on 6S, 45 A for the 1750KV and 1850KV, and 50 A for the 2200KV. Its full-throttle peaks ran from 33.4 A to 48.8 A. (BrotherHobby 1750KV test report, BrotherHobby 1200KV test report, BrotherHobby 1850KV test report, BrotherHobby 1500KV test report, BrotherHobby 2200KV test report)

Props

7-inch tri-blades for the 1200KV (2,020 g on 6S) and the 1500KV on 5S (2,130 g); 6-inch for the 1500KV on 6S (2,040 g) and the 1750KV on 5S (1,920 g); 5-inch for the 1850KV on 6S (2,003 g) and the 2200KV on 5S (1,870 g). (BrotherHobby 1750KV test report, BrotherHobby 1200KV test report, BrotherHobby 1850KV test report, BrotherHobby 1500KV test report, BrotherHobby 2200KV test report)

Battery

6S for the 1200KV and 1850KV, 5S for the 1750KV, either for the 1500KV; the motor is rated for 4S–6S. (BrotherHobby product page, BrotherHobby 1750KV test report, BrotherHobby 1200KV test report, BrotherHobby 1850KV test report, BrotherHobby 1500KV test report)

Frame

Four M3 holes on a 16 mm circle (16 × 16 mm, the usual 5-inch pattern); the shaft takes an M5 prop nut. (BrotherHobby product page, BrotherHobby 1850KV test report)

Where to buy

• BrotherHobbythe maker’s store; $24.99 for any KV once one is chosen (the page opens at $25.99); 1200KV and 1500KV listed as out of stock
  $24.99seen Oct 19, 2026
  Visit
• RaceDayQuads1850KV
  price on the store’s page
  Visit

Plain links, not affiliate links. Prices change; the store’s page has the current one.

Full specs

Bench data

Redrawn from BrotherHobby’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.

Inside the motor

A brushless outrunner: the coils stand still in the middle and the magnets spin around them. From the top down:

• Bell. 7075 aluminium bell cap, φ30 mm, with five swept spokes round a textured hub. (BrotherHobby product page, BrotherHobby 1850KV test report)
• Shaft. Hollow titanium alloy with an M5 thread, standing 14 mm above the bell. (BrotherHobby product page, BrotherHobby 1850KV test report)
• Magnets. N52H arc magnets, 14 poles. (BrotherHobby product page)
• Stator. 25 × 7 mm with 12 slots, in 0.15 mm Nippon Steel silicon steel. (BrotherHobby product page, BrotherHobby 1850KV test report)
• Bearings. NMB, 9 × 4 × 4 mm. (BrotherHobby product page)
• Base. 7075 aluminium, a 3 mm flange with four M3 holes on a 16 mm circle, and 18 AWG leads 200 mm long. (BrotherHobby product page, BrotherHobby 1850KV test report)

How fast it spins

KV is the motor’s no-load speed per volt. With nothing on the shaft, the 1850KV 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.

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 BrotherHobby’s published sizes: the 25 × 7 mm stator, 30 mm bell, 21 mm height, 5 mm shaft, 16 mm mounting circle and 12 teeth and 14 magnets. Anything BrotherHobby 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

1. BrotherHobby: Avenger 2507 V2 Motor (product page on BrotherHobby’s store, with its spec list, photos and Tech Specs tab). Retrieved Oct 19, 2026.
2. BrotherHobby: Avenger 2507 V2 photos, spec list and drawings (image on the product page). Its KV list includes a 2200KV that the store does not offer.. Retrieved Oct 19, 2026.
3. BrotherHobby: Avenger V2 2507 1750KV test report, 2018 (drawing, spec table and load test on an HQ 6 × 4 × 3 on 5S; image on the Tech Specs tab; copper temperature after one minute at full throttle). Retrieved Oct 19, 2026.
4. BrotherHobby: Avenger V2 2507 1200KV test report, 2018 (drawing, spec table and load test on an HQ 7 × 3.5 × 3 on 6S; image on the Tech Specs tab; copper temperature after one minute at full throttle). Retrieved Oct 19, 2026.
5. BrotherHobby: Avenger V2 2507 1850KV test report, 2018 (drawing, spec table and load test on an HQ 5 × 4.8 × 3 on 6S; image on the Tech Specs tab; copper temperature after one minute at full throttle). Its spec table swaps the stator-height and motor-size cells.. Retrieved Oct 19, 2026.
6. BrotherHobby: Avenger V2 2507 1500KV test report, 2018 (drawing, spec tables and load tests on an HQ 7 × 3.5 × 3 on 5S and an HQ 6 × 4 × 3 on 6S; image on the Tech Specs tab; copper temperature after one minute at full throttle). Retrieved Oct 19, 2026.
7. BrotherHobby: Avenger V2 2507 2200KV test report, 2018 (drawing, spec table and load test on an HQ 5 × 4.8 × 3 on 5S; image on the Tech Specs tab; copper temperature after one minute at full throttle). Retrieved Oct 19, 2026.