Flywoo NIN V2 1203 Pro

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

• 4.7 g

  4.7 g with 3 cm of wire, on a 12 × 3 mm stator.

  Source: Flywoo product page (archived)

• Curved magnets

  An electroplated unibell with curved magnets, which Flywoo says run smoother and quieter.

  Source: Flywoo product page (archived)

• Over 84% efficient

  Flywoo gives over 85% efficiency at 0.6–1.2 A for the 3400KV, and over 84% for the 5500KV (0.5–1.6 A) and the 11500KV (1.2–3.5 A).

  Source: Flywoo product page (archived)

• Bench numbers

  The 3400KV pulls 197 g at 6.2 A on an HQ 65 mm prop at 14.8 V, and 177 g at 5 A on a Gemfan 3108.

  Source: Flywoo 3400KV 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 6.2 A (3400KV), 6.5 A (5500KV) and 13.4 A (11500KV). The 3400KV's is its full-throttle current on the HQ 65 mm prop at 14.8 V, a run Flywoo marks as hot (85 °C after 3 s). (Flywoo product page (archived), Flywoo 3400KV data)

Props

Flywoo tested the 3400KV on Gemfan 2020 four-blade, D51 five-blade and 3108 props and an HQ 65 mm prop. (Flywoo 3400KV data)

Battery

3S–4S for the 3400KV and 5500KV, 1S–2S for the 11500KV; Flywoo suggests its 300 and 450 mAh 4S packs. (Flywoo product page (archived))

Frame

Four M2 screws, opposite holes 9 mm apart; Flywoo names its Firefly Baby Quad and Firefly Hex Nano 1.6-inch frames. (Flywoo product page (archived), Flywoo drawing)

Where to buy

• GetFPV3400KV, 4850KV, 5500KV or 11500KV; out of stock
  $13.99seen Oct 19, 2026
  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 (archived))
• Top. Cut with two rings of windows, with four M2 holes 5 mm apart around the 1.5 mm shaft, which stands 4.8 mm above the bell. (Flywoo drawing)
• Magnets. Curved magnets, 12 poles. (Flywoo product page (archived))
• Stator. 12 mm across and 3 mm tall, with 9 slots. (Flywoo product page (archived))

How fast it spins

KV is the motor’s no-load speed per volt. With nothing on the shaft, the 3400KV 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 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 Flywoo’s published sizes: the 12 × 3 mm stator, 16.2 mm bell, 9.9 mm height, 1.5 mm shaft, 9 mm mounting circle and 9 teeth and 12 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 V2 1203PRO 3400Kv \ 4850Kv \ 5500Kv 1.5mm shaft Fpv Motor (product page, Wayback Machine copy of 2025-04-22). The live page now serves Flywoo's home page. The copy was read from the same capture in Common Crawl (CC-MAIN-2025-18), and its text matches Common Crawl's copies of 2025-01-19 and 2025-01-26.. Retrieved Oct 19, 2026.
2. Flywoo: NIN V2 1203PRO outline drawing (image on the product page, still on Flywoo's image server). Retrieved Oct 19, 2026.
3. Flywoo: NIN V2 1203PRO 3400KV load data (image on the product page, under the 3400KV spec list; the image has no KV label, but its 14.8 V full-throttle run on the HQT65R, 6.2 A and 91.8 W, matches the 3400KV's max current and power). 50% and 100% throttle at 11.1 V and 14.8 V for four props; temperatures are after 3 s at full throttle, and Flywoo marks the 14.8 V HQT65R run (85 °C) as hot. The GF D51-5R and GF3108R rows give the same current and power at 11.1 V and at full throttle at 14.8 V, with different pull; copied as printed.. Retrieved Oct 19, 2026.
4. Flywoo: NIN V2 1203PRO 5500KV load data (image on the product page, under the 5500KV spec list). Left out: see the model notes.. Retrieved Oct 19, 2026.
5. Flywoo: NIN V2 1203PRO 11500KV load data (image on the product page, under the 11500KV spec list). Left out: see the model notes.. Retrieved Oct 19, 2026.
6. Flywoo: NIN V2 1203PRO product photo (white background, side view; the third image in the page's gallery), used for finish. Retrieved Oct 19, 2026.