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75 mm Electric Ducted Fan unit for LX F-35

F-35-01.jpg 75 mm Electric Ducted Fan unit for LX F-35
F-35-02.jpg 75 mm Electric Ducted Fan unit for LX F-35
Fanhousing07-75mm.STL 75 mm Electric Ducted Fan unit for LX F-35
EDF09-75mm-high.STL 75 mm Electric Ducted Fan unit for LX F-35
EDF08-75mm-low.STL 75 mm Electric Ducted Fan unit for LX F-35
Fanhousing06-75mm.STL 75 mm Electric Ducted Fan unit for LX F-35
Fanhousing05-75mm.STL 75 mm Electric Ducted Fan unit for LX F-35
Fanhousing04-75mm.STL 75 mm Electric Ducted Fan unit for LX F-35
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Creation quality: 5.0/5 (1 vote)
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3D design format
STL Folder details Close
  • EDF08-75mm-low.STL
  • EDF09-75mm-high.STL
  • Fanhousing04-75mm.STL
  • Fanhousing05-75mm.STL
  • Fanhousing06-75mm.STL
  • Fanhousing07-75mm.STL

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Publication date 2023-04-16 at 13:24
Design number 1171782
tahustvedt

tahustvedt

3D printer file info

3D model description

I struggled to get my 70 mm LX (also known as Lanxiang/Bananahobby) F-35 flying well with 70 mm fans. The intakes and exhaust were big enough to handle more air so I designed a 75 mm fan for it instead. It works really well. It's not fast but performs well with good climb.

I use the fan with a gold and black colored QF 2827 3500 kv motor and 4S lipo. I think it draws a bit more than 80 A on a full charge. This motor is available in 2600 kv for 6S but I haven't tried that myself. Grind a divet on the motor shaft for the grub screw to sit in so that it can't just slide off the shaft if it becomes slightly loose.

To balance my F-35 with a light battery I made the parts so that the fan itself sits in front of the normal mounting location in the LX F-35. Stack Fanhousing04 on top of Fanhousing05 and glue together for use in the LX F-35. Fanhousing07 is a generic housing for use in other planes.

Video of the plane flying:
https://youtu.be/EBGJEyr9wqg

Bill Of Materials (may have affiliate links):
2x m3x10 mm grub screw for mounting the fan.
2x m3x8 mm countersunk screws for mounting the motor.
3500 kv 2827 motor (for 4S lipos). I use this motor: https://ebay.us/kV8v5o

Fanhousing04-75mm.STL - Forward housing with bell mouth intake for the LX F-35.
Fanhousing05-75mm.STL - Aft housing for the LX-35 with mounting lugs.
Fanhousing06-75mm.STL - Motor mounting plate for the EDF housing.
Fanhousing07-75mm.STL - Generic housing for universal use (not F-35) with mounting lugs.
EDF08-75mm-low.STL - Low pitch fan that I used with my setup.
EDF09-75mm-low.STL - High pitch fan for experimentation.

3D printing settings

EDF08-75mm and 09-75mm should ideally be printed from a strong and heat resistant material like GreenTec Pro Carbon. PLA is strong enough but the motor shaft can get warm enough to make the fan slip off if PLA is used. Settings: 7 perimeters, 6 top and 6 bottom layers with 100% infill.

Fanhousing06-75.stl should be printed with 100% infill and from a heat resistant material.

Fanhousing 04, 05 and 07 can be printed from PLA.

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