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Compile directly from MATLAB/Simulink. Run at 100 Hz hard real-time on a deterministic, defense-grade platform. Close the simulation-to-flight loop without compromise.
100 Hz Hard Real-Time
USA Made & Assembled
$799 Ships Internationally
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KESTREL
Aerospace Division
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BUILT FOR ENGINEERS WHO BUILD CONTROL LAWS
THE KESTREL DIFFERENCE
Simulink Direct Deployment
Compile your controller from MATLAB/Simulink Autocode and run it as-generated - no reporting, no abstraction layer, no middleware. Your model runs exactly as designed. PX4 and ArduPilot require significant manual C++ porting effort. KESTREL eliminates it entirely.
Fixed, Bounded Latency
Deterministic sensing-to-actuation pipeline at 100 Hz hard real-time. Because latency is constant, you can apply standard robustness analysis - gain/phase margin, structured uncertainty - directly. Variable-latency stacks make this analysis intractable. KESTREL makes it rigorous.
MATLAB-Native Flight Data
Flight data outputs directly as MATLAB-compatible files. Close the loop between simulation and flight test without conversion tooling or manual log alignment. The simulation-to-flight feedback cycle that took days now take minutes.
Clean Stack Ownership
Your controller runs on a clean substrate - no legacy autopilot underneath it. On PX4/ArduPilot, your code runs on top of frameworks with legacy assumptions baked in throughout. KESTREL gives you full ownership. You build the controller, you own the behavior.
U.S.-Made & ITAR Free
Designed, manufactured, and assembled in the USA. ITAR free. Most competing boards are foreign-manufactured - creating ITAR concerns for defense programs. KESTREL is one of the only viable platforms for controlled-environment flight testing of proprietary control architectures.
68 Years of Flight Science
AscendOS and KESTREL are built on STI's six-decade pedigree in flight dynamics, handling qualities, and nonlinear control for piloted and autonomous aircraft. This isn't firmware from a hardware shop. It's a flight control platform from engineers who have lived flight dynamics their entire careers.
KESTREL VS. THE ALTERNATIVES
HARDWARE
BUILT FOR SERIOUS ENGINEERS
Flight Control Researchers
Deploy and validate novel control laws - adaptive, nonlinear, fault-tolerant - in flight without porting code or fighting a hobby autopilot stack.
UAS OEM Autonomy Teams
Run Simulink-generated controllers on a clean deterministic substrate. Close the simulation-to-flight loop with MATLAB-compatible data output - no conversion tooling.
Defense R&D Programs
USA-made, ITAR-free platform for controlled-environment flight testing of proprietary control architectures. No supply chain concerns, no ITAR complications.
STI Engineering Engagement Customers
Engage STI's team to build and integrate a custom flight controller for your platform. STI delivers a working system on KESTREL hardware with defined deliverables.
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