foldable multiwii quadcopter

by muellerr_ch, published

foldable multiwii quadcopter by muellerr_ch Apr 9, 2013
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5537Views 1730Downloads Found in R/C Vehicles


this is my first foldable quadcopter that i designed to accompany me on hikes in the mountains. the model was created in creo elements express (free cad package from ptc). the model can therefore be modified freely.
here's a first film of the thing in the air:

the main picture shows the quadcopter after the first crash. despite a free fall of more than 20 m nothing major got damaged except for the legs that broke off.

quadcopter on my site:


  1. 3d print the following parts:
    • house_1 to house_6
    • mount_1 to mount_4
    • ball_1 to ball_3
    • legattachment
  2. cut an 8 mm carbon rod of 1 m length in half
  3. cut 3 pieces of 70 mm length from a 4 mm carbon rod
  4. cut lid_1, lid_2, lid_4, lid_6 and lid_7 from 1 mm birch plywood
  5. cut lid_3 and lid_5 from 2 mm birch plywood
  6. glue an 8 mm carbon rod to house_3
  7. glue an 8 mm carbon rod to house_4
  8. glue mount_1-4 to the ends of the 8 mm carbon rods
  9. glue the 4 mm carbon rod to the legattachment
  10. glue the balls to the other ends of the 4 mm carbon rods
  11. assemble using m3 bolts and m2 bolts for the motor attachment ...

further material required:

  • 4 esc's (turnigy multistar 10 a)
  • 4 brushless motors (turnigy mt2204-14t)
  • 4 propellers 8x4.5 cw and ccw
  • 2s lipo 2200 mah
  • multiwii mini (40x40)
  • rc receiver

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I wonder if you could improve the landing gear by making it out of a flexible filament. I have been playing with polyurethane (http://www.thingiverse.com/thing:93148)http://www.thingiverse.com/thi... and I think it might make great rubber landing gear which could withstand the impact and even cushion it to help protect the craft.

Just an idea. And Love your design =D.

Printing in Polyurethane Rubber using Fenner Drives' Eagle Orange

I like the idea of printing a flexible landing gear. Unfortunately the quadcopter does not always crash on its landing gear. Last saturday it lost a propeller in flight and the quadcopter rammed motor first into the ground.
Flexible prints might actually be very useful for vibration insulation. After attaching a camera to this quadcopter I had a really hard time getting rid of the rolling shutter effect. I tried almost everything except for a 3d printed motor mount made of flexible plastic.

That's another excellent idea. Have been playing with this printable rubber for a bit now, but haven't had too many really good ideas for what to use it for. The camera mount and shock absorbers would be excellent uses for it. Let me know if you do design either and want me to give it a try printing them if you can't.

For now I solved the problem by using alpha gel pads. But I might consider designing another camera mount that could be printed.

Awesome foldable design. I never seen one like this great idea and great build.