Pilot secure your pen

STOP creating Foreign Object in your aircraft cockpit !

Just use a thin lanyard and this TPU piece to attach your favorite pen (see photos).

The original is 9mm diameter. Feel free to resize the STL in your slicer to your favorite flying pen dimensions.

Sainsmart TPU worked great for me. NINJATECK also worked but any flex should work. 

I used a 0.25 Nozzle. It might work with a 0.4 with less detail. In this case you must use the function ‘detect thin wall in Prusa slicer’.

Use Infill 100%,  0.10mm layer maximum.

Enjoy and fly safe!