Free Mini Extra 300 Main Wing

Updated: Jul 19

How to print and build the main wing of the Extra 300



Center Spar:

Print setting: "Solidbody LWT"

Yes I did mean LWT. As it is the spar is almost overkill, the wing just needs a little bit more support from plastic extruded in an opposite direction.

Orientation: Should lay flat on its back on the build plate.

Supports: off

Right Spar:

Print setting: "Solidbody LWT"

Orientation: Should lay flat on its back on the build plate.

Supports: on because there are tabs that connect to the center spar that will need them.


Left spar: Look at the picture above in a mirror and follow the directions again. in fact you can use the mirror command within Cura to mirror the left spar making it the right spar, or left wing making it the right wing, etc.


Spar Assembly:

The left and right spar sections need to be cleanly CA glued to the center wing spar. The center wing spar is to be CA glued to the back of the landing gear mount as illustrated below. I'd recommend slipping all the wing parts onto the spar and dry fitting the actual spar center before CA gluing it. It is far easier to find the real spar center that way.


Wing Root:

Print setting: "Solidbody LWT"

Orientation: If you lay these parts on the build plate outer edge down, you will not need to provide any printing support.


Main Wing:

Print Setting: LightweightPLA thinwall. Click link for description.

Orientation: align inboard side to the build plate and print vertically.


Aileron:

Print Setting: LightweightPLA thinwall. Click link for description.

Orientation: Align the leading (hinge) edge of the aileron to the build plate.

Supports need to be on.


Aileron Horn:

Print setting: "Solidbody LWT"

Orientation: The side of the horn that you see in the image below should be flat to the build plate.


Completed Wing Assembly Below:

Custom Adjustable Pushrod:

Print setting: "Solidbody Rigid"

Supports On.

Orientation: This is a very curvy part, there is no real way of laying it flat on the build plate. Simply get is as close as possible, and ensure the supports can be created underneath.

How is this adjustable? There are three different holes at the servo horn side that can be used do better dial in your circumstances. I'm still at a loss as to why this is necessary considering the precision of a printed wing but even I have had to use different ones at times.

Conclusion: That is it for the Wing Assembly! Check the main blog here for the next steps. Feel free to reach out to us with any questions. We will attempt to clarify the construction blog including your input as much as possible. Also please check out or new community forum. Feel free to post pics, ask questions, or help others.






























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