T-Motor F40 Pro V 2306.8

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 $25.90

• Two KVs for 6S

  1950KV, which T-Motor pitches for advanced training, and 2150KV for extreme flight; both are specified at 25.2 V.

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

• About 2 kg at full throttle

  On the 25.2 V bench the 1950KV pulled 1846–2033 g at 50.4–55.5 A and the 2150KV 1967–2108 g at 60.5–65.6 A, on T-Motor's T5143S-3 and T5147-3 and Gemfan's 51466-3.

  Source: T-Motor test report

• Staggered-rib top

  T-Motor says the staggered ribs of the bell top make the structure more stable, and a raised prop lock keeps the prop from working loose.

  Source: T-Motor product page

• Titanium shaft, EZO bearings

  A titanium-alloy shaft, which T-Motor says is lighter and stronger, running in EZO bearings.

  Source: T-Motor product page, T-Hobby product page

• Tuned against desyncs

  T-Motor says it optimised the magnetic circuit so the high KVs don't desync, and gives ESC settings: rampup power 15%, demag compensation high, motor timing 31, PWM 24–48 kHz.

  Source: T-Motor product page

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 10 s is 55.5 A for the 1950KV and 65.6 A for the 2150KV. T-Motor recommends its F60A Mini 4-in-1, set to rampup power 15%, demag compensation high, motor timing 31 and PWM 24–48 kHz; T-Hobby also lists the F55A PRO III. (T-Motor drawing and specs, T-Motor product page, T-Hobby product page)

Props

T-Motor recommends its T5147. At full throttle on 25.2 V the 1950KV pulled 2033 g on the T5147-3, 1925 g on Gemfan's 51466-3 and 1846 g on the T5143S-3. (T-Motor product page, T-Motor test report)

Battery

6S; T-Motor specifies both KVs at 25.2 V. (T-Motor drawing and specs, T-Hobby product page)

Frame

5-inch racing and freestyle frames, per T-Hobby. Four M3 holes, opposite holes 16 mm apart; T-Motor says the larger contact area of the base holds it more steadily. (T-Hobby product page, T-Motor drawing and specs, T-Motor product page)

Where to buy

• T-Motorthe maker's store (Tmotorhobby); same price for both KVs
  $25.90seen Oct 19, 2026
  Visit
• T-HobbyT-Motor's hobby-brand store; lists the 1950KV only
  $26.90seen Oct 19, 2026
  Visit
• Ligpower (T-Motor)T-Motor's UAV-power store; same price for both KVs; pre-sale, ships in 15–20 days
  $26.90seen 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. 27.8 mm across, dark grey, with a top of straight ribs that reach the rim staggered, some crossing; their machined faces show grey-silver. (T-Motor drawing and specs, T-Motor product page)
• Shaft. Titanium alloy, 5 mm where it leaves the bell and 4 mm inside, standing 12.3 mm above the bell with 7 mm of M5 thread; a raised prop lock sits below the thread. (T-Motor drawing and specs, T-Motor product page)
• Bearings. EZO. (T-Hobby product page)
• Base. Grey, with four M3 holes 16 mm apart and, T-Motor says, a larger contact area; 20 AWG 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 1950KV 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 T-Motor’s published sizes: the 23 × 6.8 mm stator, 27.8 mm bell, 19.1 mm height, 5 mm shaft, 16 mm mounting circle and 12 teeth and 14 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: F40PROV product page on its Tmotorhobby store (feature images, product photos, price; drawing, spec table, test report and contents are images on the page). Retrieved Oct 19, 2026.
2. T-Motor: F40PROV product drawing and spec table for 1950KV and 2150KV (image on the product page, S1). Retrieved Oct 19, 2026.
3. T-Motor: F40PROV test report, this image and the next on the product page (S1), followed by the thrust graphs (every prop at 25.2 V) and contents: 1950KV and 2150KV on T-Motor's T5143S-3 and T5147-3 and Gemfan's 51466-3, 20% to 100% throttle in 20% steps. Columns as T-Motor gives them: voltage measured per row, current, RPM, thrust in g, power, efficiency. Retrieved Oct 19, 2026.
4. T-Hobby (T-Motor's hobby brand): F40 PRO V 2306.8 product page (description, technical specifications and recommended setup as text, the same feature images, drawing, specs and test report; price). Retrieved Oct 19, 2026.
5. T-Motor (Ligpower, its UAV-power brand): T-HOBBY F40 PRO V 2306.8 product page (description, specification and test data as text, the same as S2 and S3; drawing; price). Retrieved Oct 19, 2026.