AlfaRC Beetle 3 is a compact 3" frame designed for small Nano-sized cameras. It is suitable for building a smaller, fast racing quadcopter, ideal for flying in larger gardens, gyms, or small fields. For durability, the arms are CNC-cut from 4mm thick carbon fiber, while the other plates are made of 2mm carbon. The frame supports stacks with hole spacing of 30.5x30.5mm, 20x20mm, as well as AIO boards with 25.5x25.5mm. Motors can be mounted with 9mm or 12mm hole spacing.