"Tension Bee" - a Sturdy Lightweight Copter-Frame

thingiverse

GitHub repo with latest Files --> https://github.com/splosch/tension_b # Tension Bee Sketch of a super lightweight, easy assembly drone frame that is made sturdy by tension. ## Files The Project was created with 123D Design from Autodesk. STLs of the Parts & 123D Files are attached. The STLs of the Connectors can be 3D Printed right away without support. ## Idea Flexible flat bars, such as Carbon Fiber or Glass Fiber, are connected in a ring shape using simple angled connectors. At least two edges can be used - four connectors form a ring-shape structure in this demo. This structure is easily assembled but will fall apart just as easily. But when tension is applied towards the center of the contraption with fishing-line or carbon rods, the ring stabilizes and becomes quite sturdy to bending from and towards the center. Still, flexing of corners is possible. By using an angled tensioning approach to each corner, the contraption becomes sturdy in all directions. One weak point here is the flexed flat-bar, which pushes against the connectors when made of Carbon-Fiber, potentially causing them to splinter if force is applied. The example uses standard Brushed Motors available for drones, such as JJRC H29, H29C, H29W, and H29G Quadcopter motors. It's designed for 5mm x 1mm (CF / GF) flatbars of any length, with "Spring-Metall" or wood also being viable options.