T-Motor F1408-II

What it pulls

T-Motor’s own bench test, one line per prop. Drag across the chart to move the throttle; the model above follows.

What you get for $18.90

• 12.7 g, up to 734 g

  T-Motor gives 12.7 g without leads (14.9 g with) and a maximum thrust of 734 g; on its bench the 3950KV pulled 734.72 g at 22.42 A on an HQ3520-3 at 4S.

  Source: T-Motor product page, T-Motor drawing and specs, T-Motor test report

• Two KVs

  2800KV for 4S–6S and 3950KV for 3S–4S.

  Source: T-Motor product page, T-Motor drawing and specs

• T-mount top

  Props fix with four M2 screws on a 5 mm circle round a 1.5 mm shaft stub, which T-Motor says fits more frames and props.

  Source: T-Motor product page, T-Motor drawing and specs

• One prop at three voltages

  The 2800KV was run on a Gemfan 3028 tri-blade at 16.8, 21 and 25.2 V, pulling 390 g, 557 g and 726 g at full throttle.

  Source: T-Motor test report

What to pair it with

Our reading of T-Motor’s numbers, so your build matches what the motor was tested with.

ESC

Peak current over 60 s is 15.3 A for the 2800KV and 22.4 A for the 3950KV. T-Motor suggests its Mini F45A 6S 4-in-1; T-Hobby says a 3–6S ESC. (T-Motor drawing and specs, Ligpower (T-Motor) product page, T-Hobby product page)

Props

3–4-inch props, per T-Hobby. At full throttle at 16.8 V the 2800KV pulled 531 g on an HQ3520-3, 618 g on a Gemfan 4042-2 and 626 g on a Gemfan 4023-3. (T-Hobby product page, T-Motor test report)

Battery

4S–6S for the 2800KV, 3S–4S for the 3950KV. T-Hobby suggests a 4S 1500 mAh or 6S 1100 mAh 120C pack, for a take-off weight of about 520–530 g. (T-Motor drawing and specs, T-Hobby product page)

Frame

3–4-inch cinewhoops and SPEC racers, per T-Motor. Four M2 holes on a 12 mm circle. (T-Motor product page, T-Motor drawing and specs)

Where to buy

• T-Motorthe maker's store (Tmotorhobby); same price for both KVs
  $18.90seen Oct 19, 2026
  Visit
• T-HobbyT-Motor's hobby-brand store; both KVs
  $18.90seen Oct 19, 2026
  Visit
• Ligpower (T-Motor)T-Motor's UAV-power store; both KVs; pre-sale, ships in 15–20 days
  $18.90seen 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 T-Motor’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. 17.9 mm across, CNC-machined aluminium in black, with a six-spoke top; every other window is edged in red anodising. (T-Motor drawing and specs, Ligpower (T-Motor) product page, T-Motor product page)
• Shaft. 1.5 mm where it leaves the bell, standing 3 mm above it (2 mm in the spec tables), in a T-mount seat with four M2 prop-screw holes on a 5 mm circle. (T-Motor drawing and specs)
• Base. Grey, 2 mm thick, with four M2 holes on a 12 mm circle; 24 AWG black leads, 150 mm long. (T-Motor drawing and specs, T-Motor product page)

How fast it spins

KV is the motor’s no-load speed per volt. With nothing on the shaft, the 2800KV 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 T-Motor’s published sizes: the 14 × 8 mm stator, 17.9 mm bell, 17.2 mm height, 1.5 mm shaft, 12 mm mounting circle and 9 teeth and 12 magnets. Anything T-Motor 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. T-Motor: F1408-II Cinewhoop Motor product page on its Tmotorhobby store (feature images, product photos, price; drawing, spec tables, test report and contents are images on the page). Retrieved Oct 19, 2026.
2. T-Motor: F1408-II product drawing and spec tables for 2800KV and 3950KV, with the start of the test report (image on the product page, S1). Retrieved Oct 19, 2026.
3. T-Motor: F1408-II test report, starting at the foot of the drawing image (S2) and running over this image and the next three on the product page (S1), the last with the contents: 2800KV on a Gemfan 3028-3 at 16.8, 21 and 25.2 V and on HQ3520-3, GF4042-2 and GF4023-3 at 16.8 V; 3950KV on GF D90-3, HQ3520-3, GF4024-2 and GF4023-3 at 12.6 V and on GF3028-3 and HQ3520-3 at 16.8 V; 50% to 100% throttle in 5% steps. Columns as T-Motor gives them: thrust in g, voltage measured per row, current, RPM, power, efficiency; one motor surface temperature per table, after 1 min at 100% throttle, ambient 19 °C. Retrieved Oct 19, 2026.
4. T-Hobby (T-Motor's hobby brand): F1408-ii 3-6s Brushless Racing Motor For Cinewhoop Drones, product page (description, recommended setup, price; the same drawing, specs and test report as images). Retrieved Oct 19, 2026.
5. T-Motor (Ligpower, its UAV-power brand): T-HOBBY F1408-II product page (description, matching guide, specification and test data as text, the same as S2 and S3; drawing; price). Retrieved Oct 19, 2026.