Flywoo NIN 2303.5

What it pulls

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

What you get

• 21.5 g

  21.5 g with 3 cm of wire, on a 23 × 3.5 mm stator.

  Source: Flywoo product page

• One-piece bell

  An electroplated unibell with curved N52H magnets and NSK bearings from Japan.

  Source: Flywoo product page

• Over 85% efficient

  Flywoo gives over 85% efficiency at 1.5–3 A for the 1750KV and at 2.5–5 A for the 3000KV.

  Source: Flywoo product page

• Bench numbers

  The 1750KV pulls 1,355 g at 23.3 A on an HQ 6 × 2.5 three-blade at 24 V, and 1,070 g at 16.5 A on a Gemfan 5125.

  Source: Flywoo 1750KV data

What to pair it with

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

ESC

Flywoo gives max currents of 23.3 A (1750KV) and 41 A (3000KV), each the full-throttle current with the HQ 6 × 2.5 three-blade on its bench (24 V and 16 V). It marks those runs as hot after 3 s (82 °C and 85 °C). (Flywoo product page, Flywoo 1750KV data, Flywoo 3000KV data)

Props

Flywoo tested the Gemfan D90, Gemfan 5125, 5126, 5130 and 6026, and HQ 5 × 3 and 6 × 2.5 three-blade props. The 3000KV pulls 1,389 g on the HQ 6 × 2.5 at 16 V. (Flywoo 1750KV data, Flywoo 3000KV data)

Battery

5S–6S for the 1750KV, 3S–4S for the 3000KV. (Flywoo product page)

Frame

Four M2 screws, opposite holes 12 mm apart. (Flywoo drawing)

Where to buy

• Flywoothe maker's store; 1 motor, same price for each KV (the 3000KV was sold out)
  $11.99seen Oct 19, 2026
  Visit
• GetFPV1750KV or 3000KV
  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 Flywoo’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. One piece (unibell), electroplated. (Flywoo product page)
• Top. Cut with two rings of windows, with four M2 holes 5 mm apart around the 1.5 mm shaft, which stands 1.2 mm above the bell. (Flywoo drawing)
• Magnets. Curved N52H magnets, 14 poles. (Flywoo product page)
• Stator. 23 mm across and 3.5 mm tall, with 12 slots. (Flywoo product page)
• Bearings. NSK, from Japan. (Flywoo product page)
• Shaft. 3 mm inside the motor, 1.5 mm where it leaves the bell. (Flywoo product page)

How fast it spins

KV is the motor’s no-load speed per volt. With nothing on the shaft, the 1750KV 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 Flywoo’s published sizes: the 23 × 3.5 mm stator, 29.09 mm bell, 13.5 mm height, 1.5 mm shaft, 12 mm mounting circle and 12 teeth and 14 magnets. Anything Flywoo 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. Flywoo: NIN 2303.5 Ultralight Fpv Motor 1750kv / 3000kv (Silver) (product page, with a spec list for each KV). Retrieved Oct 19, 2026.
2. Flywoo: NIN 2303.5 outline drawing (image on the product page). Retrieved Oct 19, 2026.
3. Flywoo: NIN 2303.5 1750KV load data (image on the product page, under the 1750KV spec list; the image has no KV label, but its 24 V full-throttle run on the HQ T6x2.5x3, 23.3 A and 559.2 W, matches the 1750KV's max current and power). 50% and 100% throttle at 20 V and 24 V for seven props; temperatures are after 3 s at full throttle, and Flywoo marks the 24 V HQ T6x2.5x3 run (82 °C) as hot.. Retrieved Oct 19, 2026.
4. Flywoo: NIN 2303.5 3000KV load data (image on the product page). 50% and 100% throttle at 12 V and 16 V for seven props; temperatures are after 3 s at full throttle, and Flywoo marks the 16 V GF6026 (83 °C) and HQ T6x2.5x3 (85 °C) runs as hot. The 12 V 50% rows of the GF5126 and GF5125R are identical (4.4 A, 271 g); copied as printed.. Retrieved Oct 19, 2026.
5. Flywoo: NIN 2303.5 main product photo (white background, the first image on Flywoo's motor collection), used for finish. Retrieved Oct 19, 2026.