BrotherHobby Tornado T5 3115 Pro

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 for $45.99

• About 4.4 kg of pull on 6S

  On BrotherHobby’s 6S bench the 1050KV pulled 4,449 g at full throttle on an HQ 9 × 5 × 3, drawing 68.2 A; the 970KV pulled 4,431 g on an HQ 10 × 4.5 × 3.

  Source: BrotherHobby 1050KV test report, BrotherHobby 970KV test report, BrotherHobby thrust summary

• Efficient on big props

  The 480KV on a 13-inch tri-blade made 666 g at 30% throttle for 57.96 W (11.49 g/W) and 3,413 g at full throttle (4.69 g/W).

  Source: BrotherHobby 480KV test report

• Hard-anodised 7075, open top

  Bell cap and base in hard-anodised 7075 aluminium; BrotherHobby says the cut-out top saves weight and helps cooling.

  Source: BrotherHobby product page, BrotherHobby infographic

• NMB bearings

  Japanese NMB 11 × 5 × 5 mm bearings, which BrotherHobby says take more axial load.

  Source: BrotherHobby product page, BrotherHobby drawing

• TU1 wire, N52H magnets

  TU1 enamelled wire with a high slot fill and N52H arc magnets at a consistent air gap, around a stator of 0.2 mm Kawasaki silicon steel.

  Source: BrotherHobby infographic, BrotherHobby product page

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 6S 80 A ESC for the 900, 970 and 1050KV (peaks of 65.4–68.2 A), 6S 90 A for the 1200KV on an 8-inch (88.6 A peak), 6S 50 A for the 480 and 640KV (29 A and 39 A), 4S 65 A for the 1520KV (61.1 A), and 8S 40 A or 12S 30 A for the 400KV (21.1 A and 25.4 A). (BrotherHobby thrust summary, BrotherHobby 400KV 12S test report, BrotherHobby 400KV 8S test report, BrotherHobby 480KV test report, BrotherHobby 640KV test report, BrotherHobby 900KV test report, BrotherHobby 970KV test report, BrotherHobby 1050KV test report, BrotherHobby 1520KV test report, BrotherHobby 1200KV 8-inch test report)

Props

BrotherHobby tested 13-inch tri-blades on the 480KV (6S) and the 400KV (8S), an 11-inch on the 640KV, 9- and 10-inch tri-blades on the 900, 970 and 1050KV, 8- and 9-inch carbon two-blades on the 1200KV, and an 8-inch tri-blade on the 1520KV (4S). (BrotherHobby 400KV 8S test report, BrotherHobby 480KV test report, BrotherHobby 640KV test report, BrotherHobby 900KV test report, BrotherHobby 970KV test report, BrotherHobby 1050KV test report, BrotherHobby 1520KV test report, BrotherHobby 1200KV 8-inch test report, BrotherHobby 1200KV 9-inch test)

Battery

Rated 5S–8S. BrotherHobby’s tests run most KVs on 6S, the 400KV on 8S and 12S, and the 1520KV on 4S. (BrotherHobby product page, BrotherHobby infographic, BrotherHobby 400KV 12S test report, BrotherHobby 1520KV test report)

Frame

Four M3 holes on a 19 mm circle (19 × 19 mm); four M3 × 8 screws and an M5 flange nut come in the box. (BrotherHobby product page, BrotherHobby drawing, BrotherHobby packing list)

Where to buy

• BrotherHobbythe maker’s store; same price for every KV
  $45.99seen Oct 19, 2026
  Visit
• RaceDayQuads1050KV
  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. Hard-anodised 7075 aluminium, φ37.5 mm, with a lattice-textured centre and open slots round the top. (BrotherHobby product page, BrotherHobby infographic, BrotherHobby drawing)
• Shaft. Hollow titanium alloy, 5 mm with an M5 thread, standing 16 mm above the bell. (BrotherHobby product page, BrotherHobby drawing)
• Magnets. N52H arc magnets, 14 poles. (BrotherHobby product page, BrotherHobby infographic)
• Stator. 31 × 15 mm with 12 slots, in 0.2 mm Kawasaki silicon steel, wound with TU1 enamelled wire. (BrotherHobby product page, BrotherHobby infographic, BrotherHobby 1050KV test report)
• Bearings. NMB, 11 × 5 × 5 mm, one at each end of the stator tube. (BrotherHobby product page, BrotherHobby drawing)
• Base. 7075 aluminium, with four M3 holes on a 19 mm circle and 16 AWG leads 300 mm long. (BrotherHobby product page, BrotherHobby drawing)

How fast it spins

KV is the motor’s no-load speed per volt. With nothing on the shaft, the 1050KV 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 31 × 15 mm stator, 37.5 mm bell, 33.5 mm height, 5 mm shaft, 19 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: Tornado T5 3115 Pro Motor (product page on BrotherHobby’s store, with its spec list, photos and Tech Specs tab). Retrieved Oct 19, 2026.
2. BrotherHobby: Tornado T5 3115 Pro introduction, KVs, battery range and the builds it is meant for (image on the product page). Retrieved Oct 19, 2026.
3. BrotherHobby: Tornado T5 3115 Pro full-throttle summary for the 480, 640, 900, 970 and 1050KV, with the ESC for each (image on the product page). Retrieved Oct 19, 2026.
4. BrotherHobby: Tornado T5 3115 Pro construction: winding wire, stator steel, magnets, shaft and bell (image on the product page). Retrieved Oct 19, 2026.
5. BrotherHobby: Tornado T5 3115 Pro bearings and dimension drawing (image on the product page). Retrieved Oct 19, 2026.
6. BrotherHobby: Tornado T5 3115 Pro 400KV test report on 12S (50.4 V) with an HQ 9 × 5 × 3, 2023 bench (image on the Tech Specs tab). Its spec table gives the weight as 220 g; the 8S report gives 110 g.. Retrieved Oct 19, 2026.
7. BrotherHobby: Tornado T5 3115 Pro 400KV test report on 8S (33.6 V) with a Gemfan 13 × 8 × 3, 2023 bench (image on the Tech Specs tab). Retrieved Oct 19, 2026.
8. BrotherHobby: Tornado T5 3115 Pro 480KV test report on 6S with a Gemfan 13 × 8 × 3, 2023 bench (image on the Tech Specs tab). Retrieved Oct 19, 2026.
9. BrotherHobby: Tornado T5 3115 Pro 640KV test report on 6S with a Gemfan 11 × 7 × 3, 2022 bench (image on the Tech Specs tab). Retrieved Oct 19, 2026.
10. BrotherHobby: Tornado T5 3115 Pro 900KV test report on 6S with an HQ 9 × 5 × 3, 2022 bench (image on the Tech Specs tab). Retrieved Oct 19, 2026.
11. BrotherHobby: Tornado T5 3115 Pro 970KV test report on 6S with an HQ 10 × 4.5 × 3, 2023 bench (image on the Tech Specs tab). The page’s summary image gives 2.0 g/W and 102.6 °C for the same run; the report’s 2.71 g/W and 112 °C are used.. Retrieved Oct 19, 2026.
12. BrotherHobby: Tornado T5 3115 Pro 1050KV test report on 6S with an HQ 9 × 5 × 3, 2023 bench (image on the Tech Specs tab). Retrieved Oct 19, 2026.
13. BrotherHobby: Tornado T5 3115 Pro 1520KV test report on 4S with a Gemfan 8 × 4 × 3, 2023 bench (image on the Tech Specs tab). Its copper temperature of 30.1 °C after two minutes at full throttle is left out as an evident misprint.. Retrieved Oct 19, 2026.
14. BrotherHobby: Tornado Pro 3115 1200KV test report on 6S with an 8 × 4.5 carbon two-blade, 2018 bench (image on the Tech Specs tab; copper temperature after one minute at full throttle). Retrieved Oct 19, 2026.
15. BrotherHobby: Tornado Pro 3115 1200KV test on 6S with a 9 × 4.7 carbon two-blade, 2018 bench (image on the Tech Specs tab; copper temperature after one minute at full throttle). Retrieved Oct 19, 2026.
16. BrotherHobby: Tornado T5 3115 Pro packing list (image on the product page). Retrieved Oct 19, 2026.