How to 3D Print a Complete FPV Drone Carrying Case: Design and Build Guide
A proper carrying case protects your investment, organizes your gear, and makes traveling to flying spots effortless. While commercial cases from Pelican, Nanuk, and Harbor Freight (Apache series) are excellent, a custom 3D-printed case — or more practically, a 3D-printed insert system for a commercial case — provides perfect fitment for your specific equipment. This guide covers designing and printing custom FPV drone cases, from full printed enclosures to laser-cut foam replacement inserts that organize your goggles, transmitter, batteries, tools, and multiple quads in a single grab-and-go package.
Approach 1: Fully 3D Printed Case (Small Gear)
A completely 3D printed case is practical for goggles, a radio transmitter, or small accessories. For anything larger, the print time and material cost become prohibitive compared to a commercial case with printed inserts.
Design Requirements
A functional case requires several elements:
- Structural rigidity: The case walls must resist crushing and impact. Use at least 4mm wall thickness with internal ribbing for larger cases.
- Weather resistance: A tongue-and-groove seal around the lid perimeter, combined with a compressible TPU gasket, provides splash resistance.
- Secure closure: Snap-fit latches designed with TPU’s flexibility create reliable closures. Alternatively, use off-the-shelf draw latches from a hardware store embedded in printed pockets.
- Carry handle: Design an integrated handle with enough cross-section (at least 15×10mm) to support the loaded case weight without permanent deformation.
Material Selection
For a fully printed case, use PETG for the structural shell (rigidity, durability) and TPU 95A for the gasket, latches, and internal padding. A two-material design leverages each material’s strengths. If your printer supports multi-material (Bambu Lab AMS, Prusa MMU3), print the case in PETG with integrated TPU seal — if not, print separate PETG and TPU components and assemble.
Practical Example: Goggle Case
A goggle case is the most practical fully-printed project. For DJI Goggles 3 or Walksnail Goggles X:
- Dimensions: Approximately 200×150×120mm external. Fits on any printer with a 220×220mm bed.
- Print time: 18-24 hours total (split into shell and lid).
- Material cost: ~$8-12 in PETG + $3-5 in TPU for inserts.
- Design features: Contoured internal cavity matching the goggle shape, a cutout for the battery cable, and a mesh pocket area for spare antennas.
Approach 2: Printed Inserts for Commercial Cases (Recommended)
The most practical and popular approach combines a commercial hard case with fully custom 3D-printed inserts. This method gives you the durability and weather sealing of a professional case with the precise fitment of custom design. The Harbor Freight Apache 3800 ($39) and 4800 ($59) cases are the community standards — they’re 80% of a Pelican at 25% of the price.
Measuring Your Case Interior
Accurate measurements are critical for inserts that fit properly. Measure the interior dimensions at the bottom (where the insert sits) — cases typically taper slightly. Account for the lid’s interior protrusion (some cases have egg-crate foam in the lid). Leave 2-3mm clearance on all sides for easy insertion and removal. Document these dimensions in your Fusion 360 parameter table.
Designing the Insert Layout
The insert is essentially a negative space — cavities that match each piece of equipment, surrounded by structural walls. Start by taking reference photos of your gear arranged in the case, then model each cavity:
- Quad cavity: The most complex cavity. Trace the drone’s outline with 5-8mm clearance on all sides. Account for protruding antennas, the battery strap, and any cameras. Add finger cutouts (semicircular recesses) on at least two sides of each cavity so you can grip and remove equipment.
- Transmitter cavity: The radio is the largest item. Model the main body plus clearance for extended sticks (if you leave them attached) or separate cavities for detached stick ends.
- Goggle cavity: Deep cavity with the antenna stowed. Add a cutout for the battery cable and power button clearance.
- Battery cavities: Individual slots for LiPo packs, sized 10-15% larger than the pack dimensions. Leave walls between battery slots for impact protection — you don’t want damaged packs contacting each other.
- Tool and accessory cavities: Rectangular pockets for hex drivers, props, spare antennas, zip ties, and other small items. Group similar items together.
The Modular Approach
Rather than printing one monolithic insert (which strains your printer’s build volume and wastes material if one section fails), design the insert as modular tiles that fit together like a puzzle. Each tile covers a section of the case floor (e.g., 120×120mm or 150×150mm) and contains cavities for specific equipment. The tiles butt against each other with a simple interlocking tab-and-slot or dovetail joint. This modular approach allows you to reconfigure the case when your gear changes — print a new tile for your new quad instead of reprinting the entire insert.
Print Settings for Case Inserts
Case inserts use different print settings than other drone parts because the requirements differ — they need compressive strength (supporting stacked cases), good dimensional accuracy (friction-fit parts), and reasonable print speed (large parts):
| Parameter | Value | Rationale |
|---|---|---|
| Material | PETG (structural) or PLA+ (budget) | Rigidity needed; TPU too flexible for insert structure |
| Layer Height | 0.28-0.32mm | Speed over surface quality for large prints |
| Walls | 3-4 perimeters | Good strength without wasting material |
| Infill | 15-20% gyroid | Adequate compression resistance; gyroid distributes load |
| Top/Bottom Layers | 3 top, 3 bottom | Solid surface for equipment to rest on |
| Nozzle | 0.6mm (if available) | Faster printing with thicker layers; detail not critical |
Adding TPU Padding
Even with a well-designed PETG insert, equipment benefits from a softer contact surface. Two approaches work well:
- TPU cavity liners: Print thin (2mm) TPU shells that drop into each PETG cavity, providing a soft surface that grips equipment and prevents rattling. These print quickly (30-60 minutes each) and can be reprinted if they wear.
- Adhesive foam: Line the bottom and walls of cavities with adhesive-backed neoprene or EVA foam (available in sheets from craft stores). This is lighter than printed TPU and provides excellent shock absorption. Cut foam to size using the cavity footprint as a template.
Complete Case Build Example: The Ultimate FPV Go-Bag
Here’s a real-world example using an Apache 4800 case with printed PETG inserts:
Layout (Apache 4800: 457×370×152mm interior)
- Left zone (225×370mm): Radio cavity (Radiomaster Boxer) with antenna folded, goggle cavity (DJI Goggles 3), and a front accessory pocket for lens cloths and SD cards.
- Right zone (232×370mm): Two 5-inch quad cavities with prop clearance, each with a battery storage bay beneath (the insert is two layers tall — quads sit on top, batteries nestle below).
- Center strip (30×370mm): Tool slots for hex drivers, prop wrench, and a slot for a USB power bank.
- Lid insert: A thin PETG panel with zippered mesh pockets for props, spare antennas, and cables.
Print Schedule
| Part | Tiles | Time Each | Material |
|---|---|---|---|
| Left zone insert | 3 tiles | 5-7 hours | 800g PETG |
| Right zone insert | 3 tiles | 4-6 hours | 650g PETG |
| Battery bay | 2 tiles | 3-4 hours | 400g PETG |
| Lid panel | 2 tiles | 3-4 hours | 250g PETG |
| Cavity liners | 6 pieces | 0.5-1 hour | 200g TPU |
Total project: ~40 hours of printing, ~2.3 kg of filament ($50-60 material cost), plus the case ($59). Complete custom FPV carrying case for approximately $110 — half the price of a Pelican equivalent with inferior pick-and-pluck foam.
Design Tips for Professional Results
- Fillet everything: All internal corners in cavities should have a minimum 2mm radius. This improves print quality, reduces stress concentrations, and makes the insert look professional.
- Label cavities: Emboss text labels into the insert floor (“5-INCH QUAD”, “6S 1300mAh”, “M2 HEX”). At 0.2mm layer height, text is crisp and legible. Print in a contrasting color by swapping filament at the text layer (single-extruder technique) or using a multi-material system.
- Drainage holes: Add 5mm holes in the bottom of cavlties that might hold wet equipment (quads, tools). Water drains instead of pooling.
- Desiccant compartment: Design a small lidded pocket for silica gel packets to control humidity inside the case.
- Weight relief: Use the Shell command in Fusion 360 to hollow out solid sections of the insert that don’t bear load. This can reduce material use by 30-40% without compromising strength.
Alternatives to Custom Design
If designing from scratch is too time-consuming, several options provide a head start. Thingiverse and Printables host dozens of FPV-specific case inserts for popular cases and equipment. Search for “[your case model] + [your gear]” — there’s a good chance someone has designed an insert for your combination. These designs can be modified in Fusion 360 or Tinkercad to adjust cavity sizes. Even if the design isn’t perfect, starting from an existing model saves hours of measurement and layout work.
A well-organized carrying case elevates the entire FPV experience. No more tangled antennas, no more forgotten batteries, no more damaged goggles rattling around in a backpack. Invest a weekend in designing and printing your custom case insert, and every flying session afterward starts with a smile when you open that perfectly organized case.