FR3/FR4 Quadcopter Frames

thingiverse

This is a scaled-down version of the popular FR7 open-source quadcopter frame, designed to fit both 3" and 4" quads while maintaining its sleek appearance. Key features include: * A versatile center frame that can be swapped between 3" and 4" arms. * 3" arms are optimized for use with 1306/1407 motors, while 4" arms support up to 1806 motors (M2 and M3 versions). * The top plate is compatible with batteries up to 2000mAh 4S. * A sturdy Session TPU mount with a built-in Jello Guard ND filter insert is available in two angles: 25deg and 30deg. * A micro camera mount is integrated into the GoPro mount for added convenience. The frame's design accommodates 1.5mm main plates and 2.5mm arms, but thicker plates can be used with some modifications to the GoPro mounts (coming soon). To build this frame, you'll need: * 8x M3x5 button head screws for the main plates * 3x M3x8 button head screws for the GoPro mount * 2x M3x6 button head screws for arm connections * 2x M3 24mm length 5mm OD threaded round spacers * 3x M3 20mm length 5mm OD threaded round spacer (GoPro mount and rear posts) * 5x M3 press nuts (4 for arms and one for the GoPro mount) * 16x M2x5 or M3x5 button head screws for motors * 2x M2x8 for the FPV camera mount * 4-8x ~M3x16 screws for stacks You can find the GoPro mount files here: https://www.thingiverse.com/thing:3782127