MakerBot Print is our newest print-prepration software, which supports native CAD files and STL assemblies,
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"wytti" flown his first one perfectly with even 680 grams, but he is a very experienced pilot.
See here https://www.thingiverse.com/make:180914
The total weight should be about 540 grams.
My wing weighs 270 grams incl. servos.
How thick did you print the wing?
Perhaps the engine was too weak?
Can you share pictures or upload a Make?