EDF Ducted Fan HET 6904 / HET 2W20

D2W20-6904

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High End Technology RC (HET) 6904  EDF Ducted Fan with Typhoon HET EDF 2W-20 28mm 4600Kv brushless pre installed motor. Recommended for 4s Lipo, it is suitable for example for the Viperjet by Tomahawk Design, but can be equally used with most models weighting 1 - 1.4 kg.

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Data sheet

EDF Diameter Class (mm): 70
Blades: 4
Turns/min/Volt (Kv): 3400
Motor Type: In-Runner
Motor Diameter (mm): 28
Shaft diameter (mm): 3.17

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High End Technology RC (HET) 6904  EDF Ducted Fan with Typhoon HET EDF 2W-20 28mm 4600Kv brushless pre installed motor. Recommended for 4s Lipos, it is suitable for example for the Viperjet by Tomahawk Design, but can be equally used with most models weighting 1 - 1.4 kg.

The fan unit comes completely mounted with a HET 2W-20 motor.  The unit is assembled and checked at factory,  precision balanced and harmonically tuned.

Set comprises:

  • 1 x High End Technology RC (HET) 6904 Ducted Fan Unit Fan unit with optional intake lip
  • 1 x HET 2W-20 motor
 
Specification:
 
  • Dynamcially balanced rotor
  • 3.175mm chuck adaptor
  • Motor pre-installed and balanced 
  • 3.5mm/4mm gold connector installed
  • Recommended for 4S lipo
 
Recommended ESC setup:
 
  • Cutoff Voltage: Auto
  • Current Limiting: Standard
  • Brake Type: Disable
  • Timing Advance: Middle 18 deg
  • Cutoff Type: Hard
  • Start Type: Fast Start
  • Governor Mode: Auto
  • PWM: 16K
 
HET 6904 Ducted Fan Units standard description :
 

HET 4 Blade 6904 69mm EDF Ducted Fan (adapt. 3.17mm) for use with brushless motor like the HET 2W, 2W-20, 2W-23, 2w-25 or equivalent. Fits into a Wemotec mini fan space

The HET fan unit is a 480 class mini fan that comes with a cooling fan. The fan unit is compatible with Wemotec fan units. The fan unit is constructed of a carbon filled plastic and aluminum set up. The HET fan unit features a carbon reinforced housing. The stiffer housing will produce more thrust, better efficiency and less of a chance of a rotor blade breaking off the hub at higher rpm's.

  • Outside Diameter: 72mm
  • Inside Diameter: 69mm
  • Collet Adaptor Size: 3.175mm 
  • Weight: 56 grams - 68 grams (with cooling ring)
  • Rotor: 4 bladed (68mm) dynamically balanced
  • Comes complete with tools, instructions and intake ring
  • RPM Range: Up to 50,000 rpm
  • For use with brushless motor like the HET 2W, 2W-20, 2W-23, 2w-25 or equivalent.
  • Fits into a Wemotec mini fan space
 

Note: Use ahesive tape or CA glue to securely attach the intake ring to the fan unit before running the fan unit. Otherwise strong air current would blow out the intake ring.

 
Motor Description:
 

Typhoon HET EDF 2W-20 Motor 28mm 3400Kv, for pylon / EDF jets up to 1700 grams. Suitable for HET EDF unit 6904, WemoTec Mini Fan, Changesun 70mm or equivalent. 3 or 4s Lipo.

  • Suitable for HET EDF unit 6904 or WeMoTec 480 mini fan
  • Diameter : 28 mm
  • Length : 43 mm
  • Shaft Dia. : 3.17 mm
  • Weight : 93 grams
  • No load current(lo) : 2.6
  • Internal resistance: 0.014
  • KV : 3400
  • No. of poles: 6
  • Max Current: 60 A
  • Max efficiency: 89%
  • Power Nominal: 700 Watts
  • Recommended Props: APC E 4.7 X 4.7 (3 cells lipo)
  • Advance timing : 18° Middle PWM: 16 Khz
 
Note: Use adhesive adhésive or glue to securely attach the cooling ring to the motor before running the motor. In case of use with an EDF fan unit, strong air current could blow away the colling ring. Thermal paste usage is also recommended.
 
 

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EDF Ducted Fan HET 6904 / HET 2W20

EDF Ducted Fan HET 6904 / HET 2W20

High End Technology RC (HET) 6904  EDF Ducted Fan with Typhoon HET EDF 2W-20 28mm 4600Kv brushless pre installed motor. Recommended for 4s Lipo, it is suitable for example for the Viperjet by Tomahawk Design, but can be equally used with most models weighting 1 - 1.4 kg.

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