B25j Mitchell model plane

We have posted about model planes and drones before and know the model plane and drone communities are avid 3D printers. We saw a great model of a B25j Mitchell plane on Facebook recently and asked the maker, Coen Loos, for more information. He was kind enough to share some more details.

Printed by Coen Loos / design by 3DLabprint / all images by Coen Loos

Coen works at a school and got in touch with 3D printing there. He has been an avid 3D printer ever since 2015 and specifically focusses on model planes. He mainly uses designs by 3DLabPrint, specialist in 3D printable plane models. Coen was the first one using 3D printing with his local model plane club and people were skeptic at first… until he flew his printed plane!

The classic North American Mitchell B25j was mostly printed on the Prusa i3 Mk3 and made with our PLA Economy filament. Coen says: “colorFabb is my prefered brand due to its good service, reliable filament and perfect printing results.” Always glad to read that! Some smaller items were printed with nGen and Ninjaflex filament on the Ultimaker 2+.

The print settings for the main parts on the Prusa were:

  • Layer height 0.25mm
  • Nozzle temp 230c
  • Bed 55C
  • No cooling fan
  • Single perimeter of 0.42mm

Coen has chosen PLA due to its reliability but sees the need for more specific filaments. For that reason we sent him spools of our LW-PLA and varioShore TPU for further testing and we look forward to the results of that!

You can find this and many other plane models available for purchase at the 3DLabPrint website.

The results are amazing and Coen is planning on the maiden flight soon and we’re sure we’ll update you on that! Thanks for sharing, Coen!


About PLA Economy

PLA Economy is available on 2.2kg, 4.5kg and 8kg spools only. It is very well suited for the maker who needs quality filament at an affordable price. It is a perfect material for large volume and small series production, made with the guaranteed colorFabb quality that we are known for.

PLA Economy is now available in six of the most popular colors. ColorFabb PLA Economy is not a standard PLA. It has been modified for better layer adhesion and flow properties to get better performance over other basic PLA filaments. Because it’s made with the same processing technology used for other premium colorFabb products, this PLA Economy will be just as reliable.

Light Weight Plane

November 15 update: Now with video of the first flight! Scroll down to see the spectacular footage!

When we launched our light weight filament LW-PLA earlier this year we saw a lot of handy applications: cosplay, medical instruments, grips. Every print where weight is of the essence. The most positive replies we got were from the drone and RC plane community. One of the companies specialized in RC planes, Eclipson Airplanes from Spain, contacted us and were very interested in our latest offering. During the summer the Eclipson team worked on a light weight plane design specifically made to be printed with LW-PLA. Here is a first look at their Model V plane:

All designs and images by Eclipson Airplanes

A few details about the Model V plane:

  • Total weight of the printed parts 170 gr
  • Ready to flight weight (estimated) 380 gr
  • Wing span 1.370mm
  • Wing area 16 dm2
  • Wing loading 24gr/dm2

You can find more information about this design on the dedicated Model V page.

“This means that this airplane holds a new world record, it is the lightest RC plane in terms of wing loading.”

  • Team Eclipson

Rendering with Eclipson logo

When printed with regular PLA, the plane would weigh twice as much and as we all know: every gram counts in aviation. As Eclipson states on its homepage:

“Drag and weight are the two main enemies of any flying machine, reduce those two forces to the minimum was one of the main goal of this project since the conceptual phase.
The drag was reduced thanks to its streamlined shapes, clean design, V tail, high aspect ratio or winglets. Special mention deserves the wing, which is simply the best we have ever designed, this wing has a great balance between safety (docile stall characteristic) efficiency (high lift to drag ratio) maneuverability (high roll rate) and strength. Landing gear, tail and wing can be detached from the fuselage allowing you to print only damaged parts in case of crash.”

Not only did the LW-PLA reduce weight significantly, the Eclipson team also found out that LW-PLA worked extremely well for them when printing the landing gear thanks to its flexibility.

The Model V light weight plane will be for sale from Eclipson from mid-October. Keep an eye out for this excellent plane!

Located in Madrid, Spain, Eclipson Airplanes is specialized in the design of RC Planes and they have already several models available (click here to see their portfolio).

The Model V design is available for purchase at Eclipson (follow this link) and it has already made its maiden flight!


About LW-PLA

LW-PLA is the first filament of its kind using an active foaming technology to achieve lightweight, low density PLA parts. At around 230C this material will start foaming, increasing its volume by nearly 3 times. Users can decrease material flow by 65% to achieve lightweight parts, or use the expanding properties to effectively reduce print time by using big layer heights or single extra thick perimeters.


Decreasing flow means using less filament. Therefore users can expect to print 2-3 times more parts using LW-PLA compared to a regular PLA spool. LW-PLA prints in a fantastic matte looking surface finish and is very easy to post process. Any oozing or stringing artifacts rub right off and the surface is easily sanded for a smooth finish. Find out more here.

Curious how to print with LW-PLA? Find out more in our tutorial!

LW-PLA is available in Black and Natural and is available now. We ship daily, worldwide and from stock.