SkyTrak Lite - Modular DIY UAV

This is an improved and lighter version of my first SkyTrak: http://www.thingiverse.com/thing:1033593

This multirotor design is intended as a framework, rather than a finalized product.

I had the ideal of building an airframe on tracks (like a camera rig) rather than on plates like most designs out there.

Cutting carbon fiber plates for a custom UAV is complicated and laborious. 3D printed multirotor airframes do not scale up well because plastic is too flexible.

The SkyTrak Lite solves both issues by building a UAV on a carbon fiber tube "backbone". The tubes are light weight, common and cheap. The 3D printed plastic parts simply serve as joints. Core "track" tubes are 10mm in diameter, spaced 60mm from each other. I chose this format because it is a common rail configuration used on some commercial airframes and gimbals, like Tarot and DYS. The arms are 16mm in diameter, which is also a common size.

The design philosophy behind the SkyTrak was to make it fully modular