The flight controller that defines the future of drones

The first version of Fusion Engineering’s state-of-the-art flight controller—the Fusion Reflex—is the key to a new generation of drone flights. Designed with reliability and flexibility in mind, the Fusion Reflex is adaptable for any type of multirotor drone.

Aside from its light aluminium sleek design and powerful hardware, the real strength of the Reflex comes from the software. Written completely from the ground up in the Rust programming language and based on the latest research, Fusion Engineering’s flight control meets the needs of the commercial drone applications of the future.


Three years in the making with the TU Delft Research Lab; testing with the Royal Netherlands Aerospace Centre (NLR). Built from the ground up for the commercial drone market. Fault-tolerant by design. No legacy systems to get in the way. Based on Rust programming language.

  • Fully functioning nonlinear INDI controller, including trajectory control
  • Compatible with QGroundControl and other software requiring MAVLink communication
  • Optimized data management system for easier data gathering and analysis
  • Flexible in drone lay-out: works with any multirotor configuration
  • Written in an isolated modular software architecture, significantly improving reliability

Future features of the Reflex include fault detection and fault-tolerant control, advanced state estimation, an improved user interface and much more.

A glimpse into the future

We are constantly improving our flight controller so you get the best quality. Therefore, our team will continue working on software updates. Here’s some of the new improvements you can expect.

Over the last months we implemented trajectory control and made UI and configuration improvements. Furthermore, we included triple GPS for heading support and did the implementation of our unique INDI based flight control. Additionally, fault detection and fault tolerant control will be implemented over the coming months.

More questions? Read our FAQ or send us a message:

The Fusion Reflex

The Fusion Reflex is perfect for drone manufacturers that work on drone applications for the future. We work hard every day to deliver you the finest state-of-the-art flight controller that will fit your design the best. User friendliness, safety and compliance are our top priority. Contact us now and get your hands on ground-breaking tech built from the ground up for the commercial drone market and designed for the future.


Revolutionary tech, ahead of its time.
The Fusion Reflex is perfect for commercial drone companies that want to develop the next generation of drone solutions. We use the newest algorithms; facilitating the next generation of drone applications. Enter new markets and deploy for applications you didn’t consider possible.

Compliant with EU and US regulation.
Higher standards than currently required for granted Part 107 waivers. Designed to meet the EU requirements of SAIL 5 & 6, the highest risk mission classes for drones. This will make it possible to fly in places where it is not yet allowed right now.

Benefit today from more reliable and user-friendly software. Save time and costs by not having to worry about flight control. Installing it is easy: plug it in, set a few numbers and you’re good to go. No need for endless tinkering and tweaking. Still need some help? No worries, we offer full integration support.

FAQ: Reflex Introductory Model

The Fusion Reflex IM is the foundation of our envisioned system, the core of the platform. This version contains simple yet effective flight control algorithms captured in a fail-safe software architecture, running on specifically designed hardware, optimized to ensure maximum performance.

The Reflex IM is perfect for those who enjoy being early adopters of ground-breaking tech. The IM really is the bare bones of the Reflex model that is in development. But of course, you don’t have to keep it laying around on the shelf: it is fully capable of flying your multirotor drones. This first model is designed for you to get accustomed to our platform through testing it.

The Reflex IM is meant for prototyping and testing, not yet for live missions/operations.

The Fusion Reflex IM is perfect for drone manufacturers that work on drone applications for the future. With the Reflex IM, you’re one of the first to get your hands on a flight controller that will completely change the commercial drone landscape.

As an early adopter, you will be the first to receive updates along our development roadmap, including:

  • Trajectory control
  • Triple GPS for heading support
  • The implementation of our INDI algorithms
  • Fault-tolerant flight control

Join us now and get your hands on ground-breaking tech built from the ground up for the commercial drone market and designed for the future.

It contains:

  • Fusion Reflex IM
  • Power supply for testing

And every connector for connecting the flight controller:

  • 4 pin JST connector × 2
  • 6 pin JST connector × 3
  • 10 pin JST connector × 5
  • 10 pin JST terminal × 3
  • 4 pin JST PA × 2
  • JST PA pre-crimped wire × 76
  • ESC breakout board × 2

Send us an email to get your hands on one!

Software and specifications

Our flight controller uses a technique based on Incremental Nonlinear Dynamic Inversion (INDI): a novel method designed at TU Delft that overcomes the robustness issues of NDI by reducing the dependency on an accurate system model while still allowing for a precise and fast response.

Its combination of fast sensor update rates and a nonlinear control law allows for precise and aggressive manoeuvres. The use of acceleration measurements allows the control law to capture unmodeled dynamics, such as gust wind disturbances, and effectively cancel these without any modelling assumptions.

In order to increase the reliability and certifiability of drones even more, we are designing fault-tolerant control systems to equip multicopters with an additional layer of safety. Relying on fast detection of rotor failures, our fault-control system is able to steer a damaged multicopter to safety, even after complete loss of one of the rotors. Despite the loss in controllability of the drone, the combination of INDI with a novel in-house developed control technique allows the damaged drone to still land safely.

Software on our platform is split up in separate modules which run as independent isolated processes, such that a bug in one cannot take down other tasks. Even if important modules would crash mid-air, the drone will keep on flying just fine, as modules can be immediately restarted without interrupting communication with others. This way, an unexpected failure will not take down the whole system. This flexible set-up also allows you to easily add your own software modules to the system, without risks.