Welcome to Warcraft 3 Extended Edition, a project with the goal of expanding the existing game by adding unused features from the campagin as well as by adding new content of the highest possible quality while trying to keep the game as balanced as it can be.
Gyrocopters are available upon researching Flying Machine Bombs and Flak Cannons. Then the player can upgrade each Flying Machine manually just like the Obsidian Statues.
They are much sturdier, but also slower than Flying Machines and with less sight range since their primary role is combat.