SITL Forge — Physics-First Flight Simulators

SITL Forge builds high-fidelity simulation environments for open-source flight controller firmware. Every motor, propeller, and battery is modeled from real bench test data at 1000Hz. We connect directly to real firmware — Betaflight today, INAV and ArduPilot next — so you can validate builds, tune PIDs, and stress-test configurations without risking hardware.

Products

BF SITL — FPV Laboratory Coming Soon

Design, tune, and test real quadcopter builds before you ever touch hardware. Full Betaflight SITL integration with 1000Hz physics, VMG motor model, virtual workbench, and procedural audio.

Betaflight 1000Hz Physics Jolt Godot Windows Linux

Steam Store

In Development

INAV SITL Planned

SITL environment for INAV firmware. GPS navigation, waypoint missions, and autonomous flight testing with the same physics-first approach.

INAV GPS Nav Waypoints

In Development

ArduPilot SITL Planned

Simulation environment for ArduPilot firmware. Support for multirotor, fixed-wing, and VTOL configurations with full MAVLink integration.

ArduPilot MAVLink Multi-Vehicle

Shared Technology

⚙

1000Hz Physics

Jolt Physics engine with sub-millisecond timestep for accurate flight dynamics

⚡

VMG Motor Model

Torque-balance simulation with iron losses, ESC modeling, and thermal derating

🎵

Procedural Audio

Real-time motor sound from RPM, current, and thrust — no samples

🔌

Real Firmware

Direct connection to flight controller firmware via UDP/TCP at full loop rate