My friend and I are working on an (hopefully) industrial grade carbon fiber quad frame (X4 and X8). We would like to share the progress with the community, and we would really appreciate your feedback:)
The designed frame size is 1050mm with 28 inch blades, but since the arms are switchable, it can be extended or shrunk to a variety of sizes.
The prototype is currently being printed before we finalize the mold. The prototype is an X4 that comes with landing gears installed under the motors. The design also allows a different kind of landing gears attached to the main body, so that we can accommodate X8, or X4 with blades under the arms (we learned that this layout can significantly boost the efficiency).
Still debating between fixed and switchable batteries, a fixed one seems to make life easier for us in most cases, but not sure if it is the case for other users.
Thanks for your time~~