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AVIATION / Propulsion / REVIEWED 2026-09-11

B01Brushless motors

Convert electrical power into propeller torque.

Manufacturers & products

Four brushless outrunner motors turn propellers. Select winding, battery voltage, propeller load and ESC limits together; stator size alone does not predict current, thrust or efficiency.

American sourcing options appear first. A U.S. company or distributor label does not establish U.S. manufacturing. The origin notes identify the specific evidence and any limits.

manufacturer

Unusual Machines

UM2207 1860KV

U.S.-built motor family with a detailed electrical and mounting data sheet for the 1860KV winding. [2][1]

U.S. manufacturing claim

Manufacturer explicitly states its motor line is built in USA. The claim does not disclose every magnet, bearing or raw-material origin. [2][1]

Program / application

Direct five-inch-class candidate; 3S–6S documented [2][1]

Published manufacturing site: United States

Manufacturer inquiry

Public product catalog; confirm the selected variant and current fulfillment directly. No stock or delivery promise is made.

View product & inquiry route
manufacturer

Lumenier

2307 JohnnyFPV V3 1750KV

A cinematic/freestyle motor offered in several windings with a documented five-millimeter propeller interface. [4][3]

U.S. company

U.S. company in Sarasota, Florida. Product listing identifies manufacture in China; U.S. brand ownership does not change that origin. [4][3]

Program / application

Five-inch-class motor; confirm 6S propeller/load limits [4][3]

Company location: Sarasota, Florida, USA

Online catalog / ordering

Public product catalog; confirm the selected variant and current fulfillment directly. No stock or delivery promise is made.

View catalog & ordering

What remains unverified

  • Independent matched thrust/efficiency testing was not collected. Exact six-cell compatibility is explicitly documented only where cited.

Where it comes from

A company address is shown separately from a published factory location. Request the manufacturing site and lot traceability for the exact part when sourcing.

What to compare

  • KV and voltage

    Compare the exact winding against the manufacturer’s operating voltage.

  • Stator geometry

    Stator diameter and height affect torque capability, mass and thermal behavior.

  • Propeller test point

    Thrust data needs the same propeller, voltage, airflow and operating point.

  • Current duration

    A seconds-long maximum is different from a continuous thermal rating.

  • Mounting pattern

    Check the dimensional drawing and distinguish bolt-circle diameter from square spacing.

  • Shaft interface

    Match shaft diameter, thread and propeller hub thickness.

  • Mass basis

    Separate motor mass from included lead length.

  • Thermal and bearing data

    Look for temperature limits, bearing identity and winding data rather than inferred lifetime.

Selection & integration notes
  • The UM motor sheet gives a 45 A maximum for three seconds, not a 45 A continuous rating.
  • Lumenier’s public text identifies KV variants but does not establish a full 6S propeller/load approval table.

Published product examples

2 REFERENCES

Specifications belong to the named product and configuration.

UM2207 1860KVUnusual Machines
KV
1860 rpm/V[2]Nominal motor constant.
Input
25.2 V maximum; 3S–6S[2]Published winding specification.
Maximum current
45 A for 3 seconds[2]Not continuous current.
Mass
33.0 g bare; 39.2 g with leads[2]Three 20 cm 18 AWG leads included in wired mass.
Shaft / motor OD
5 / 29.8 mm[2]Physical dimensions.
Mount
4×M3 on Ø16 mm PCD[2]Bolt circle, not 16 mm square spacing.
Example sources [2]
JohnnyFPV V3 1750KVLumenier
KV
1750 rpm/V[4]1750KV variant only.
Mass
34 g[4]Lead inclusion is not specified in the table.
Shaft
5 mm, M5[4]Published prop-hub interface.
Leads
20 AWG, 110 mm[4]Listed lead specification.
Example sources [4]

Sources & references

REVIEWED 2026-09-11

Manufacturer pages and technical documents support the linked claims. A review date is not a publication date or stock check.

  1. Drone motors and Brave ESC product range Unusual Machines · Publication date not stated

    Explicit U.S.-built motor family and Brave ESC claims; commercial product inquiry.

    Accessed 2026-09-10
  2. UM2207 1860KV specification v0.1 Unusual Machines · Published 2025-11-11

    Motor electrical limits, mass and mounting geometry.

    Accessed 2026-09-10
  3. Lumenier privacy policy and company address Lumenier · Publication date not stated

    Sarasota, Florida company address, not manufacturing evidence.

    Accessed 2026-09-10
  4. Lumenier 2307 JohnnyFPV V3 motor GetFPV / Lumenier · Publication date not stated

    Variant-specific motor mass and shaft; China manufacture. No public voltage table in text.

    Accessed 2026-09-10