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To run G4.5 smoothly on modern hardware, ensure your PC meets these specifications: RealFlight G4.5 System Requirements

Access to over 70 aircraft and numerous 3D airports, including water-based takeoffs and landings.

RealFlight G4.5 remains a beloved legacy radio-control (R/C) flight simulator, offering a critical bridge for hobbyists wanting to practice complex maneuvers without the risk of damaging expensive real-world models. Whether you are a veteran pilot or a beginner, keeping your software updated to the final version of the G4 series is essential for the best physics and stability. Why Update to RealFlight G4.5?

Submerging a turbine engine now correctly "kills" it, adding a new layer of realism to seaplane operations.

If you are using modern versions like RealFlight Evolution , updates are typically managed automatically through Steam. System Requirements for G4.5