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EDF Ducted Fan Hacker Stream-Fan 70 / 3750kv


New product


Combo 70mm / 9 pales / 3750Kv (inrunner) / 3-5S / 220g
> 3S (11.1V) : 53A / 1.2kg / 588W
> 4S (14.8V) : 84A / 2.0kg / 1243W

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Data sheet

Weight (gr): 220 gr
EDF thrust (categorization) 1-2kg, 2-3kg
Direction of Rotation (EDF Rotor) Classic Counter Clock Wize (CCW)
EDF Diameter Class (mm): 70
Blades: 9
No. of Magnet Poles: 4 Poles
Turns/min/Volt (Kv): 3750 Kv
Motor Type: In-Runner
Motor Diameter (mm): 27.8 mm
Shaft diameter (mm): 3.17
Voltage (Volts): 3s (11.1v) / 4s (14,8v)
Battery Cells: 3s - 11.1v, 4s - 14.8v
Connection: PK 3.5mm

More info

EDF Ducted Fan Hacker Stream-Fan 70 / 3750kv

Hacker Stream-FAN 70/3750 combo with WeMotec Mini Fan evo (9 pales) and Hacker E40-S 1Y 3750Kv motor. The fan unit comes completely mounted. The unit is assembled and checked at factory, precision balanced and harmonically tuned. For Lipo 3s, 23A and 1.2kg of thrust or Lipo 4s, 84A and 20.kg of thrust.


Our new impeller Series combines two quality products to a high-efficiency propulsion. The Wemotec EVO impeller in conjunction with our new specially adapted to impeller engines will bring your model to unimagined power ranges. The impellers are assembled and finely balanced .
This Pack, composed with the EDF unit, the motor and the assembling and balancing service, is precisely set, harmonically balanced and tested by us.

Technical specifications

  • Motor: E40-S 1Y
  • EDF: 9-blades Wemotec Mini Fan Evo
  • LiPo : 3-4s
  • Weight incl. Motor: 220g


Voltage under load: 3S (11,1 V)

  • Current: 53 A
  • Thrust: 1200g

Voltage under load: 4S (14,8 V)

  • Current : 84 A
  • Thrust: 2000g

Readings:  We measure with a constant voltage of 3.7 V / cell. Current and thrust are measured with a small intake lip (r=6 mm) at 21° C, 50m asl and standard pressure. Depending on battery, controller and installation you may see higher or lower figures.The controller should be chosen 20% over rated due to the long lasting load.
LV = low voltage controller up to 6s, HV = high voltage controller above 6s.
Battery should be chosen about 15/ - 1/20 of the max current for 4-3 minutes WOT. 30-40 C is appropriate.


  • EDF Combo Stream-Fan Hacker 70/3750

Motor technical specifications

E40-S 2D  suitable for WEMOTEC MiniFan EVO Ducted Fan 3-5S
  • Diameter: 27.8 mm
  • Length: 49.7 mm
  • Shaft diameter: 3.17 mm
  • Weight: 150 grammes
  • KV: 3750
  • Poles: 4
  • R(I):  10mOhm
  • I(0)@8,4V:  2,5A
  • Recommended ESC: 50 A to 100A depending upon voltage usage
  • Recommended ESC timings : 5-10°

Mini Fan evo unit Specifications

  • Material: Nylon, ABS, Aluminium
  • Weight: approx. 57 g (with intake ring + 15g)
  • Power: 500-3.000 W
  • max rpm: 60.000
  • Rotor: 9 blades(68 mm) glass reinforced
  • Kit comprises: all components, english instruction
  • Ageom.: 29.4 qcm
  • Aeff.: 26.2 qcm
  • Thrust: 6-30 N
  • Thrust tube should be 56 mm in diameter for best performance. You can find several versions of such tubes in our shop.


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