Description

This FPV platform is designed as a lightweight, structurally optimized, fully 3D-printed long-range micro-class drone. The frame shown combines sweeping organic curves with a low-profile central electronics bay, delivering both aerodynamic efficiency and structural resilience. Its geometry supports beginner-friendly indoor flight while offering enough rigidity for outdoor cruising and long-duration Li-ion powered flights.

The frame leverages a skeletal, quadrupedal-style architecture: four arched legs extend outward and downward, merging into a unified base plate with weight-saving cutouts. This creates excellent impact dispersion, making the craft crash-tolerant while maintaining extremely low weight.

Frame Description

General Shape

• The chassis consists of a monolithic, single-piece 3D print with organically sculpted legs forming a broad footprint.

• Each leg curves outward and then down, creating a hovercraft-like stance that keeps the propellers well elevated above the ground plane.

• The legs terminate in smooth, oval-shaped landing pads that prevent digging into grass or carpet.

Top Structure

• A rectangular central electronics pod sits between the arches, housing the AIO flight controller.

• The pod has open sides for ventilation and wire passthroughs, ensuring the ESC and RF components do not overheat.

• Two cylindrical objects (these represent 2× 18650 Li-ion cells) sit parallel inside a recessed tray above the FC, holding the long-range battery firmly in place.

Camera Housing

• A compact cube-shaped camera shroud is molded into the front of the frame.

• The camera is positioned low, directly between the front legs, protected by the forward curvature of the frame.

• The wide spacing of the arches forms a natural impact shield around the camera lens while maintaining a clear FOV.

Structural Optimization

• The frame features triangular and oval cutouts along its arms and main body.

• These reduce weight substantially while preserving bending stiffness.

• The symmetrical skeleton-like geometry evenly distributes crash energy into the legs.

Motor Mount Regions

• The outer ends of the arches flatten into motor plates with pre-modeled recesses for bolt heads.

• Each plate aligns naturally with the vertical load path from the motor bell into the main frame.

Specs & Features

Core Advantages

• Frame engineered for long-range flight, optimized endurance, graceful crash absorption, and indoor maneuverability.

• Printed in one solid piece—no fasteners, no joints.

• Designed specifically for 2S Li-ion long duration packs.

• Low-profile electronics cavity ensures ideal CG alignment.

Parts List 

Frame

• 1× 3D Printed Frame (One-piece organic-arched monocoque design)

Electronics

• Flight Controller: Happymodel ELRSF4 2G4 AIO (5-in-1)

  • Integrated ELRS 2.4GHz receiver

  • Integrated VTX 25–200 mW

  • 4-in-1 ESC

• Camera: Ant Nano FPV

• Battery: 2S Li-ion pack (2× 18650 cells shown in the frame)

• Motors: Happymodel EX1202.5 11500KV

• Propellers: Gemfan 75 mm bi-blade

Physical Dimensions

• Length: Approx. 125 mm

• Width: Approx. 115 mm

• Height: ~40–45 mm (variable with battery + antenna)

• Weight: ~64 g (without battery)

3D Printing Settings

• Layer height: 0.2 mm

• Material: PLA+, PETG, or lightweight carbon-fiber-filled filament recommended

• Walls: 3–4

• Infill: 25–40% gyroid (for impact absorption)

• Print orientation: Flat on the bed as shown in the image (legs down)

• Supports: Not required for most printers

Assembly Notes

Motors

• Mount motors onto the flattened outer pads at the end of each curved leg.

• Ensure wiring routes inward through the oval-shaped cutouts toward the electronics pod.

Camera

• Insert the nano camera into the integrated shroud.

• Secure using the printed side pockets or a single M2 screw (depending on your model variant).

Flight Controller

• The AIO board sits inside the top central cradle.

• The frame’s open sides allow the XT30/Battery leads to pass through without strain.

Battery

• The recessed tray accommodates two 18650 cells.

• Use a velcro strap routed around the central pillars.

Programming Reminders

• Disconnect the Li-ion pack before plugging into USB.

• Flash firmware, set motor order, assign receiver, and save frequently in Betaflight.