Home Platforms Store Training Mission
View Store Contact Us
Multirotor Digital Download In Stock
D-71
7" Printable UAV Airframe — STL Design Package
Prop Size
7"
FC Mount
30.5mm
Material
PA612-CF Nylon/PLA+
FC Support
BF / AP
Origin
NC, USA
Delivery
Digital

Flight-tested STL design package for builders who want repeatable printability, modular structure, and a real airframe they can assemble, service, and evolve. Designed around common 30.5×30.5mm FPV standards and validated through physical prints, assembly, and flight testing.

$14.99
One-time purchase · Instant digital download
Assembly Manual
Purchase grants personal / internal use rights. Redistribution prohibited.
Secure CheckoutWooCommerce / SSL
Instant DeliveryDownload on purchase
Product Supportsupport@sentineldynamicsllc.com

The Sentinel Dynamics D-71 is a purpose-designed, 3D-printable 7" UAV airframe developed for builders who want repeatable results, modularity, and real-world performance. This is a validated airframe design, built specifically for additive manufacturing and refined through physical prints, assembly, and flight testing.

Design Intent

  • Optimized for FDM 3D printing — no exotic processes required
  • Designed around common 30.5×30.5mm FPV electronics standards
  • Modular layout to support future revisions and customization
  • Structural rigidity prioritized over cosmetic complexity
  • Practical tolerances validated through real prints and assembly

Who This Is For

  • 3D printing enthusiasts who want a functional UAV project
  • Hobbyists looking for a printable 7" FPV platform
  • Engineers who value validated geometry and clear build constraints
  • Developers who want a base airframe to modify or integrate

Recommended Filaments

  • PA612-CF Nylon or PLA+ for structural airframe components
  • TPU for flexible components such as the FC dust cover

This is not a concept model — it is a manufacturable airframe intended to be built and flown. Component tolerance adjustments may be required depending on printer calibration, material choice, and slicer settings. This is standard for functional 3D-printed parts.

Assembly Manual
Complete hardware references, print settings, component specs, and step-by-step assembly guidance. 26 pages.
Download PDF
Required Hardware
M3 bolts, washers, and nuts. M2 hardware and heat inserts. CA glue. Soldering iron with M2/M3 heat insert tip. Full quantities in assembly manual.
Purchase Hardware
Replacement Arms
Platform-specific structural replacement arms available separately. Validated fitment, same print settings as original frame.
View Parts
SpecificationValue
Airframe
Platform Class7" FPV Multirotor
Prop Size7 inch
Build MethodFDM Additive Manufacturing
Design OriginNorth Carolina, USA
ArchitectureModular — replaceable arms and structural sections
Electronics Mounting
FC / ESC Pattern30.5×30.5mm standard
Flight ControllersTBS Lucid H7, Speedy Bee F405, any 30mm stack
ESC55A 4-in-1, Rotor Riot Brave, TBS Lucid
FC FirmwareBetaflight, Ardupilot
Video / FPV
CameraFatShark Aura (recommended) or standard analog
VTXTBS Unify Pro32 – NDAA version
Video AntennaTBS Airscrew 5.8GHz
Materials
FramePA612-CF Nylon or PLA+
FC Dust CoverTPU (flexible)
Delivery
File FormatSTL design package
Delivery MethodDigital download (instant)
LicensePersonal / internal use — redistribution prohibited
Price$14.99 USD
Complete STL Package
All flight-tested airframe STL files optimized for FDM printing. Every printable component included.
Hardware Reference List
Complete, build-ready hardware list so you can source all parts before you start printing.
Assembly Guidance
Clear, high-level assembly direction designed to reduce guesswork and speed up the build process.
Electronics Fitment List
Curated list of flight electronics verified for clearance, mounting, and compatibility with D-71 geometry.
Baseline Print Settings
Recommended print parameters — layer height, wall count, infill strategy, and orientation — developed for this airframe.
Flight-Tested Geometry
This is not a concept model. Every file in this package has been physically printed, assembled, and flown.
ComponentRecommended ModelNotes
Flight ControllerTBS Lucid H7, Speedy Bee F40530×30mm mounting holes required
ESC55A 4-in-1, Rotor Riot Brave, TBS Lucid30×30mm mounting holes required
GPSBZ-25125×25×8mm — must be similar size to fit
Motors2807, 1500kv or similar4× required
VTXTBS Unify Pro32 – NDAA versionAntenna hole aligned left — NDAA version only
Video AntennaTBS Airscrew 5.8GHz—
CameraFatShark Aura AnalogStandard analog FPV camera mount
ReceiverRP1 ELRS RX or similar—
Battery Straps20×300mm or similar—
Antenna AdapterSMA Female to MMCX Male—
⚠ Fitment Note The D-71 was designed specifically around the components listed above. Substitute parts are not guaranteed to fit. Minor tolerance adjustments may be required depending on printer calibration, material choice, and slicer settings.
Why D-71

Built to Print, Fly, and Survive

01
Modular Architecture
Arms, covers, and structural sections are individually replaceable. Crash one component, print a new one — no full rebuild required.
02
Rapid Field Repair
Designed to get back in the air fast. Key components are bolt-on and tool-accessible in the field without full disassembly.
03
Flight-Tested Geometry
Every file has been physically printed, assembled, and flown. This is not a concept design — it is a proven airframe.
04
Open Integration
Compatible with Betaflight and Ardupilot. Designed around 30.5mm mounting standards for maximum electronics compatibility.
Sentinel Dynamics
Get in Touch
✓
Message Sent
We will get back to you at the email you provided.