: Official "User Made" aircraft like the Duo Discus and Grunau Baby 2b can be downloaded for free from the official Aerofly-Sim website .
During Steam sales (Summer, Winter), IPACS sometimes offers free weekends. That means the is unlockable for 48–72 hours at no charge. Aerofly Fs 4 Free Download
Although the base game is paid, there are several ways to get additional content or save money legally: Aerofly FS 4 Flight Simulator on Steam 12 Apr 2026 — : Official "User Made" aircraft like the Duo