EDF Ducted Fan Wemotec Midi Fan evo / HET 650-68-1340 (Pack)

MDE 650-68-1340

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Modern high efficiency multi bladed fan unit. The fan unit comes completely mounted with a HET 650-68-1340 motor. The unit is assembled and checked at factory, precision balanced and harmonically tuned.

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Data sheet

EDF thrust (categorization)3-4kg, 4-5kg
EDF Diameter Class (mm):90
Blades:11
Turbine shroudSynthetic
EDF RotorSynthetic
Turns/min/Volt (Kv):1340
Motor Type:In-Runner
Motor Diameter (mm):36
Shaft diameter (mm):5
Battery Cells:8s - 29.6v, 10s - 37v, 12s - 44.4v

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Modern high efficiency multi bladed fan unit. The fan unit comes completely mounted with a HET 650-68-1340 motor. The unit is assembled and checked at factory, precision balanced and harmonically tuned.

Readings:

 8s9s10s12s
 Voltage
29,6 V
33,3 V
37,0 V
44,4v
 Current
59,5 A
74,5 A
na
90A
 Power
1761 W
2481 W
na
3960 W
 rpm   
 Thrust
3,12 kp
3,76 kp
na
4,48 kp
 Efflux velocity    
 71,12 m/s
78,08 m/s
na
na
 Efficiency
0,62
0,58
na
na
 Controller
> 70 A / HV
> 90 A / HV
      > 100 A / HV      
> 120 / HV
 Battery
   3.000-4.000 mAh   
   3.700-5.000 mAh   
3.700-5.000 mAh  
  3.700-5.000 mAh 


Note: using the 1340kv motor with a 12 cells lipo (44,4v) requires a motor heatsink and a cool down of the motor temperature after each flight. 

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.


Set comprises:

  • 1 x Midi Fan pro ducted fan unit
  • 1 x HET 650-68-1340
 
 
 inner diameter: 89,0 mm
 outer diameter: 92,0 mm
 length of shroud: 60 mm, w/o intake lip
 weight, complete: 402 grams (opt. intake rin + 19g)
 fan swept area: 49,40 sqcm
 rotor: 11 blades, nylon (glass reinforced)  
  
 rec. thrust tube dia.:  75 mm diameter
 Timing ESC: approx. 6° (4-pole motor)
 PWM: 8-12 kHz
 
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.
 

Motor specifications:

  • Diameter : 36 mm 
  • Length : 67.5 mm
  • Shaft Dia. : 5 mm 
  • Weight : 300 grams 
  • Internal resistance: 17.5
  • No load current (lo): 1.5
  • Max efficiency: 88% 
  • Poles : 4 
  • No load KV : 1340
  • Suggested lipo cells. : 10-12S 
  • Max amps: 120A (12S)
  • Power Nominal: 4100 watts
  • Recommended advance timing : low
  • Thrust: 4.1 kgs (37.0V) / 5.6 kgs (44.4V)
  • Specially designed for 9305 and Midi fan units
 
 

Midi Fan evo unit Specifications:

Ducted Fan unit of the poular 89 mm Midi Fan class, both optimized for Sound and efficiency. This fan brings efficiency of multibladed fans to a new level. The one piece glass reinforced Nylon rotor comes calibrated and dynamically balanced. All components are compatible to the former Midi Fan pro. 

  • Material: Nylon, ABS, Aluminium
  • Weight: about 102 grams, incl. intake lip
  • Power range: 1.000-4.000 W
  • Max. rpm: 50.000 U/min
  • Rotor: 11-blades (87,5 mm) glass reinforced Nylon
  • Set: all parts, incl. instruction
  • Ageom.: 49,4 qcm 
  • Aeff.: 45,6 qcm 
  • Thrust: 7-50 N
     

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EDF Ducted Fan Wemotec Midi Fan evo / HET 650-68-1340 (Pack)

EDF Ducted Fan Wemotec Midi Fan evo / HET 650-68-1340 (Pack)

Modern high efficiency multi bladed fan unit. The fan unit comes completely mounted with a HET 650-68-1340 motor. The unit is assembled and checked at factory, precision balanced and harmonically tuned.

Write a review

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