One design philosophy, an expanding catalog. Every Sentinel platform is engineered around modular additive manufacturing, field-serviceable architecture, and repeatable deployment, built to fly, survive, and iterate.
The D-71 is Sentinel's development and trainer platform, a flight-tested STL design package that gives builders a real airframe they can assemble, service, and evolve. Engineered for repeatable FDM printability and modular field maintenance, the D-71 is the ideal starting point for pilots learning the platform and developers iterating on new configurations.
The Picket-7 is Sentinel's dedicated intelligence, surveillance, and reconnaissance platform. Built around a servo-stabilized dual-camera gimbal, it carries an 8x optical zoom for long-range daytime observation alongside a 640-resolution thermal imager for low-light and heat-signature detection. A proprietary lithium-ion battery slides onto a printed Picatinny rail for rapid field swaps without wire management. With 30+ minutes of hover endurance, the Picket-7 is engineered to stay on station.
The QR-31 is built for the spaces most platforms can't operate in. A compact 3.5" quadcopter purpose-designed for interior reconnaissance, confined-space navigation, and pilot training, where size, maneuverability, and low risk of collateral damage matter more than endurance. Optional IR camera and IR flashlight make it viable for low-light recon without modification to the airframe.
Two platforms currently in active development. Sign up for updates or reach out to discuss early access and custom mission requirements.
The Picket-7 is Sentinel's full-spectrum ISR multirotor. A servo-stabilized gimbal carries both an 8x optical zoom and a 640 thermal camera, with a full 90° downward tilt and active stabilization throughout. A proprietary lithium-ion battery mounts to a printed Picatinny rail for rapid field swaps — no wire management required. Designed for operators who need to stay on station and see clearly when it counts.
Sentinel's first fixed-wing platform. The RL-3 is built around efficient cruise performance and extended range, designed for survey, reconnaissance, and beyond-line-of-sight applications where a multirotor's hover capability isn't required. Clean aerodynamic structure, printable, and field-repairable like everything else in the Sentinel lineup.
Compact 19×19mm analog FPV camera mount engineered for the D-71. Clean integration, minimal weight, and a secure grip on standard analog cameras. Also compatible with other builds using similar geometry.
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Keep your D-71 in the air. A full set of four printed structural arms, platform-specific geometry, validated fitment, and the same print settings as the original frame. The fastest way to get back to flying after a hard landing.
Shop PartsHardware references, print settings, component specs, and step-by-step assembly logic for the complete D-71 build. Essential reading before you start, reduces build errors and gets you to first flight faster.
Open ManualIf you need an airframe adapted around a specific development goal, payload constraint, or operational workflow, start the conversation. Sentinel works directly with builders, organizations, and developers on custom scopes.
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