Recommended:

OS: Windows 7, Windows 8 or Windows 10
Processor: AMD Quad-Core running at ~2.7 GHz or Intel Quad-Core with HT processor running at ~3.3 GHz (Intel Core i7 or AMD APU A6 3670 and newer architectures are recommended).
Memory: 6 GB RAM
Graphics: DirectX 11 compatible NVIDIA, ATI/AMD graphic card with 4GB of dedicated VRAM (and Shader Model 4.0 support).
DirectX: Version 9.0c
Storage: 2 GB available space
Sound Card: Any
Additional Notes: Keyboard Supported - Steam Controller, XBox Controller or compatible Recommended

Iron Wings screenshots