Unreal Engine
Is a great place to start creating your assets, or ever new aircraft mods.
Downloads
Application (Free)
https://www.unrealengine.com/en-US
Market place (A lot of free content to use and build from)
https://www.unrealengine.com/marketplace/en-US/store
My Favorite Free Market once you have the application installed
https://www.unrealengine.com/marketplace/en-US/assets?keywords=Vigilante
Enjoy, be sure to start discussions and ask for help!
Cheers
Hoova