SITL Forge - FPV Laboratory Demo is a free taste of the physics-first quadcopter simulator and engineering workbench. The full 1000Hz simulation engine, calibrated motor models, virtual workbench, OSD, debug graphs, and built-in PID flight controller — no compromises on fidelity, no time limits. Content is limited to two preset drone builds; upgrade to unlock the complete parts catalog and integration with real flight-controller firmware.---What's in the demo Full 1000Hz physics simulation (Jolt Physics with the calibrated VMG motor model) Built-in PID flight controller in ACRO, ANGLE, and HORIZON modes PID and Rates tuning with live feedback Two preset drone builds: a 7" airframe and a 10" airframe Two calibrated motors and two matched propellers One ESC stack and one battery Full OSD, debug graphs, and force / drag visualization Procedural motor audio generated from RPM, current, and thrust Joystick and RC transmitter support FPV camera with lens distortion, chromatic aberration, and vignetting Bilingual interface: English and Ukrainian---What the full version unlocks Complete parts catalog — dozens of frames, motors, propellers, ESCs, and batteries calibrated to real bench data Vibration tuning — inject configurable noise into the simulated gyro and accelerometer to stress-test PID stability Payload simulation — attach and release boxes, tubes, and custom weights mid-flight Simulation feature toggles — motor thermals, ESC damage, battery wear, motor drag, and more Optional DLC bridges to real firmware running in software-in-the-loop mode (Betaflight, iNAV, ArduPilot — sold separately) MSP Bridge for connecting Betaflight Configurator directly to the simulated drone---Same engine. Same