D-20C Personal Eagle II

D-20C Personal Eagle II

Fully 3D-Printable Personal VTOL — a Working Tool, Not a Toy

The D-20C Personal Eagle II is a fully 3D-printable fixed-wing hybrid VTOL — the civilian variant of our D-20 platform. It carries an 850 g payload over long distances — up to 75 km one way, 70 minutes in the air. Two tilting front rotors and a third rotor inside the ring tail lift the aircraft straight up from a backyard, forest clearing or boat deck; then the front gondolas tilt forward and the D-20C flies like an efficient airplane.

Typical missions: aerial photography and video, mapping and surveying, search & support, FPV training, long-range cruising — the quick-swap payload bay accepts a camera gimbal, extender battery or cargo.

HIGHLIGHTS

• Autolaunch — place the aircraft on the ground, plug in the battery, press the START button on the airframe. The aircraft takes off, flies its mission and lands back — no laptop, no RC transmitter required.
• No pilot skills needed — automated vertical takeoff and landing removes the highest-risk flight phases entirely.
• 100% 3D-printed airframe — no carbon spars, no metal fasteners. The whole aircraft is assembled with CA glue in 8 bonding operations, under 30 minutes (when printed on a Prusa XL; smaller printers split the parts into more segments, adding a few joints).
• Tool-less field setup — the wings detach for transport; from backpack to air in under 2 minutes.
• Companion-computer ready — a Raspberry Pi (or any SBC with the Pi 40-pin connector) plugs straight onto the NavPack: its own high-current power rail switched by the autopilot, MAVLink already wired. No cables, no extra BEC.
• Built to last — unlike classic vase-mode printed airplanes, the D-20C prints conventionally with two perimeters and infill: a much stronger structure that also handles sun exposure well.

SPECIFICATIONS

INCLUDED IN YOUR DOWNLOADS

• STL files — the complete airframe, plus the XL folder with larger one-piece sections for the Prusa XL (fewer joints)
• 3MF print projects (PrusaSlicer) — all critical settings pre-configured: foaming flow, walls, seams, orientation. Open, slice, print
• Ready-made G-code for the Prusa MK4S
• User Guide PDF — detailed step-by-step build, setup & flight manual, including a full slicer-settings breakdown for porting the profiles to any printer

Coming soon as a free update: the printable transport backpack, adapted to the D-20C — the whole aircraft, wings off, carried on your back. From backpack to air in under 2 minutes.

FLIGHT CONTROLLER

The D-20C is designed for our plug-and-play NavPack D04, which ships pre-flashed with the complete D-20C setup — autopilot, GNSS, professional magnetometer, digital airspeed and all power electronics on one board. No soldering of modules, no weeks of parameter tuning: plug in motors and servos and go flying.

Flying it on a different ArduPlane flight controller (e.g. Matek H743 Wing)? Download the free universal D-20C parameter file — the complete airframe tuning (VTOL + fixed-wing PIDs, transitions, servo functions and end points, Siyi gimbal and gimbal-holder setup) for any ArduPlane 4.6+ board; only board-specific setup and calibrations remain on you. See the NavPack in action: NavPack video.

ELECTRONICS NEEDED

2× front motor 2812 900 KV with tilt servos, 1× rear motor 3110 1200 KV, 3× 50 A ESC (BDShot), 3× control-surface servo, NavPack D04, 6S2P Li-ion battery, mLRS/ELRS/CRSF RC system. The complete shopping list with specs, cable lengths and connectors is in the User Guide.

BASIC REQUIREMENTS

3D printer with a 0.4 mm nozzle and direct-drive extruder, build area 250 × 210 mm or larger (G-code for Prusa MK4S; XL folder for large-format printers — and the included slicer-settings table lets you port the profiles to any machine).

PolyLight 1.1 active-foaming LW-PLA, FlexiLight 1.0 foaming flex, PolyAir strong PLA and PET-G.

PrusaSlicer or OrcaSlicer (both free).

Create account and download:

You’ll receive a link for all files to your email inbox and after checkout, the download button appears (in most cases immediately). Or login to your account and download directly from our website anytime.

BECOME A 3DFENSE PARTNER

We are looking for partners to represent 3DFENSE in other parts of the world — selling the complete UAV Production System: a turnkey capability to print, build and operate UAV fleets locally, aimed not only at defence but at universities, public services, research and civil institutions. Hands-on experience with the D-20C (or other 3D-printed aircraft) is expected — if you have built one and see the potential, we want to hear from you: dokoupil@3dfense.com

3DFENSE — from printer to sky. Vertically.