• Emax CF2805 2840KV brushless motor front angle showing 3mm shaft, red housing, and mounting base
  • Top view of CF2805 brushless motor showing stator windings, exposed bell, and motor leads
  • Emax CF2805 2840KV brushless motor with three solder leads and base plate on white background
  • Compact red Emax CF2805 outrunner motor close-up showing printed band label and mounting flange
  • Size comparison photo of Emax CF2805, CF2812, and CF2822 red brushless motors lined up
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Emax CF2805 2840KV Brushless Motor for 2S Li-Poly, 22x5mm Stator, 3mm Shaft, 29g

Emax CF2805 2840KV Brushless Motor for 2S Li-Poly, 22x5mm Stator, 3mm Shaft, 29g

Emax

$27.72 USD
$27.72 USD
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Overview

The Emax CF2805 2840KV motor is a brushless motor specified for 2S Li-Poly setups and compact electric model aircraft power systems. It is rated for APC 6x4 and 7x4 propeller testing, with published RPM, current, and thrust figures for each prop.

Key Features

  • CF2805 motor, 2840 RPM/V (KV)
  • 2S Li-Poly support
  • 3 mm shaft diameter
  • Published performance data with APC 6x4 and APC 7x4 props

Specifications

Model CF2805
No. of cells 2 x Li-Poly (2S)
RPM/V 2840
Stator dimensions 22 x 5 mm
Shaft diameter 3 mm
Weight 29 g / 1.02 oz
Recommended model weight 200-300 g
Recommended prop without gearbox APC 7x4; APC 6x4
Test prop (APC) 6x4
RPM (APC 6x4) 13000
Max current (APC 6x4, <60S) 12 A
Thrust (APC 6x4) 413 g (0.91 lb)
Test prop (APC) 7x4
RPM (APC 7x4) 9900
Max current (APC 7x4, <60S) 14.4 A
Thrust (APC 7x4) 381 g (0.84 lb)
Mechanical drawing (key dimensions) Outer diameter: 28.5 mm; Shaft: 3 mm; Lengths: 10.9 mm / 25.6 mm / 36.5 mm; Front face: inner diameter 22 mm; Mounting: 4 x 3.0 mm holes

Applications

  • Electric model aircraft around 200-300 g
  • 2S Li-Poly power systems using APC 6x4 or APC 7x4 propellers

For compatibility questions (prop selection, 2S setups, and installation), contact support@rcdrone.top or visit https://rcdrone.top/.

Details

Emax CF2805 2840KV brushless motor specs and test results on 2S Li-Poly with APC 6x4 and 7x4 props

Performance specs include RPM, current draw, and thrust figures for APC 6x4 and 7x4 propeller testing on 2S Li-Poly setups.

CF2805 motor mechanical dimension drawing with 28.5 mm outer diameter, 3 mm shaft, and 4×3.0 mm mounting holes

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