Brushless Motor for Heavy-Lift Electric Multi-Rotor (UAS) Series
  • $385.00



Recommended ESC: KDE Direct UAS 125A+ UVC HE Multi-Rotor Series
Alternate ESC: KDE Direct UAS 95A+ HVC Multi-Rotor Series

Recommended Propeller: KDE Direct 24.5" x 8.1 Dual-Propeller Blades


  • One (1) KDE Direct XF UAS Propeller Bracket Assembly (Black Edition)
  • One (1) KDE Direct XF UAS M10 Propeller Bracket Assembly (Black Edition)
  • Three (3) KDE Direct XF ф4.0mm 24K Bullet Connectors (KDEXF-BC40Female)
  • Four (4) M5 x 0.8 x 8 mm Flat Head Phillips Head Machine Screws (Class 12.9)
  • Four (4) M4 x 0.7 x 8 mm Flat Head Phillips Head Machine Screws (Class 12.9)
  • Two (2) M3 x 0.5 x 10 mm Socket Head Cap Screws (Class 12.9)
  • Four (4) M3 x 0.5 x 14 mm Socket Head Cap Screws (Class 12.9)

Replacement Parts:

The new KDE Direct 6815XF-205 (HE) Multi-Rotor Brushless Motor is an extremely efficient and powerful motor for numerous multi-rotor and UAS heavy-lift applications, and was designed to bring high-quality and vibration-free motors to the market. The motor incorporates a very high-efficiency (HE) design, used in our industrial applications, and now brought to the UAS market for long-duration flight performance. The motors are designed with performance and durability in-mind, with features unseen in the current market: (1) high-grade, 240°C continuous (340°C maximum) high-temperature solid-core copper windings for failure-free operation in extreme-climates, (2) Japanese-built, 0.2 mm silicon-steel stator laminations and Kevlar tie-wraps for high-efficiency performance, and (3) triple-bearing supported, ABEC-7 bearings for maintenance-free and worry-free flying for hundreds of hours. These are just a few of the advantages built-in to these motors, and every detail of the motors was scrutinized to produce the absolute best available; for a wide-range of flight applications.

Motor includes 200°C, 13 AWG, 760mm silicone-wire leads and ф4.0mm 24K Bullet Connectors (KDEXF-BC40, pre-soldered to the motor leads and ESC matching Bullet Connectors).

UAS Multi-Rotor Brushless Motor Series Technology Review (PDF)


Material: Neodymium N45UH

Models: Universal mounting pattern provides simple installation for a wide-range of multi-rotor and UAS applications: M4 x ф30mm, M4 x ф40mm, M5 x ф40mm.


  • Clear anodize, mirror-polish CNC gloss endbells
  • Black electro-plate, CNC gloss central core (flux ring)

Full Specifications:

Kv (Motor Velocity Constant) 205 RPM/V
Kt (Motor Torque Constant) 0.0470 Nm/A
Km (Motor Constant) 0.2126 Nm/√(W)
Maximum Continuous Current 57 A (180 s)
Maximum Continuous Power* 3000 W (180 s) (52.2 V)
Voltage Range 22.2 V (6S LiPo) - 52.2 V (12S LiHV)
Io (@10V) 1.9 A
Rm (Wind Resistance) 0.048 Ω
Stator Poles 24 (24S20P)
Magnetic Poles 20 (24S20P)
Bearings Triple, 6900-2RS/6000-2RS
Mount Pattern M4 x ф30 mm, M5/M4 x ф40 mm
Stator Class 6815, 0.2 mm Japanese
Shaft Diameter NA
Shaft Length NA
Motor Diameter ф77.2 mm
Motor Rotor Inertia 0.779 kg*cm^2
Motor Length 49.5 mm
Motor Weight 550 g (630 g with Wires/Bullets)
Propeller Blade Size Up to 24.5"-TP (21.5"-TP Maximum on 12S)
Motor Advance Timing 22° - 30°
Motor Drive Frequency 16 - 32 kHz

*: Brushless motor requires consistent open airflow (5 mph or greater) across the windings to maintain maximum continuous current and power ratings during operation. Performance figures are provided as guidelines for normal conditions and operation; environmental factors, such as air temperature and humidity, can significantly alter the maximum performance limits of the motor.

Performance Data

Manuals & Models



STEP Model (Click here to download) *Files are compressed as .rar files to decrease space & increase download speed.
To decompress the files, any reputable unarchiver will work such as WinRAR, 7-Zip, PeaZip, etc.

We Also Recommend