FlexSandwich 100mm flexible brushed quadcopter

thingiverse

This is a training FPV quadopter I've designed for maximum durability to facilitate painless learning. It's specifically suited for printing with flexible materials. FPV footage: https://youtu.be/jwg5GdMFVk4 Excuse my beginner flying skills. The overall look and shape of the frame was inspired by https://www.thingiverse.com/thing:1221911. Thanks, [punkkills](https://www.thingiverse.com/punkkills) - it was also the first FPV quadcopter I've flown. Unfortunately it was too brittle printed from PLA for my flying skill, so I needed something more rugged. After many failed attempts to design a durable (meaning one that survives crashing into a tree at its maximum speed) 100mm frame which could be printed from PLA or PETG, I decided to try flexible materials for the top and bottom frame parts. So far I've had the best results with Ninjatek SemiFlex for those parts (blue parts in the drawings). The rest of the parts (green) I've successfully printed in PLA and PETG and proven to work fine. For a full frame you'll need to print: * 1x FS_base (choose rigid or flex depending on material), * 1x FS_roof (as above) - *print upside down*, * 2x FS_splitter (don't use flexible materials) - this parts breaks the most often; print at least one spare, * 4x FS_pin (don't use flexible materials) *print upside down* - this part is easily lost if pin clip detaches; print at least 2 spares, * 4x FS_pin_clip (don't use flexible materials) *print upside down* - this part easily detaches in case of crash, print at least 4 spares, * 1x FS_rubber_clip. All models provided in assembly orientation. Some (marked above) require printing upside down. The 2 main parts of the frame are the base and the roof. They can (and should) be printed using flexible materials. The rest of the parts should be printed using regular plastics. If you don't want to use flexible materials, choose the rigid versions of base and roof, they have larger motor clearance. In fact the flex versions have negative clearances around the motors - otherwise the motors would fall out.