Xnova 1407 Supersonic

What it pulls

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

What you get

• Four KVs, 16 g

  2800KV for 4–6S, 3100KV and 3500KV for 3–4S and 4000KV for 3S, each 16 g.

  Source: Xnova basic data

• M5 prop shaft

  An M5-threaded shaft standing 11.5 mm above a 19 mm bell.

  Source: Xnova drawing

• Smooth and balanced

  Xnova lists low cogging torque and smooth running, and says the motors are precisely balanced and fully tested.

  Source: Xnova product page

• Bench numbers

  The 3100KV pulls 509 g on a Gemfan 5030 at 13.3 A on 11.1 V and 610 g on a DYS 4040 three-blade at 20.5 A on 14.8 V; the 2800KV pulls 600 g on a Gemfan 5125 at 18.4 A on 14.8 V.

  Source: Xnova 2800KV test result, Xnova test result

What to pair it with

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

ESC

Full-throttle currents on Xnova's bench run from 6.3 A (3100KV, DYS 3030 three-blade, 11.1 V) to 28 A (3500KV on 14.8 V, results Xnova prints in red); the 3100KV peaks at 20.6 A on 14.8 V and the 2800KV at 18.4 A. (Xnova 2800KV test result, Xnova test result)

Props

Xnova tested 3-, 4- and 5-inch props: DYS 3030 and 4040 three-blades, a DYS 4045 and a Gemfan 5030, plus a Gemfan 5125 on the 2800KV. Props fit the M5 shaft. (Xnova 2800KV test result, Xnova test result, Xnova drawing)

Battery

4–6S for the 2800KV, 3–4S for the 3100KV and 3500KV, 3S for the 4000KV. (Xnova basic data)

Frame

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

Full specs

Bench data

Redrawn from Xnova’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. A red upper bell over a black band. (Xnova product photo)
• Shaft. M5 thread, standing 11.5 mm above the bell, with 6.5 mm of thread. (Xnova drawing)
• Base. Four M2 holes, opposite holes 12 mm apart. (Xnova drawing)

How fast it spins

KV is the motor’s no-load speed per volt. With nothing on the shaft, the 3100KV 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 Xnova’s published sizes: the 14 × 7 mm stator, 19 mm bell, 16 mm height, 5 mm shaft and 12 mm mounting circle. Anything Xnova 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. Xnova: NEW! Xnova 1407 racing motor series. 2800kv_3100kv_3500KV_4000KV (product page). Retrieved Oct 19, 2026.
2. Xnova: Supersonic RM1407-2800, -3100, -3500 and -4000 basic data (no-load current, weight, battery and resistance; image on the product page, dated 2021-02-03). Retrieved Oct 19, 2026.
3. Xnova: Xnova RM1407 series specifications (technical details page linked from the product page). Retrieved Oct 19, 2026.
4. Xnova: 1407-2800kv Test Result on a GF5125 at 14.8 V (image on the RM1407 specifications page, dated 2021-02-03). Xnova lists the rows from 100% down.. Retrieved Oct 19, 2026.
5. Xnova: XTS 1407 Test Result for X1407-3100KV, -3500KV and -4000KV (image on the RM1407 specifications page): current and thrust at 50%, 60% and 100% throttle on 11.1 V and 14.8 V. Xnova lists the rows from 100% down; its efficiency column is grams per amp, not per watt, and is left out. Xnova prints the 3500KV's 14.8 V DYS4045 and DYS4040 Tri results in red, noting that red data "should be careful".. Retrieved Oct 19, 2026.
6. Xnova: RM 1407 outline drawing (image on the RM1407 specifications page). Retrieved Oct 19, 2026.
7. Xnova: RM 1407-3100 product photo (image on the product page), used for finish. Retrieved Oct 19, 2026.