Installation

In Blender open Edit, Preferences, Get Extensions, then use Install from Disk and pick the helicopter_generator zip.

Usage

1. Open the Helicopter tab in the 3D viewport sidebar (N). With nothing selected, click the picture to pick one of the 15 helicopters, then press Add. You can also use Shift+A, Mesh, Helicopter.
2. The card at the top shows the helicopter. Click its picture to switch to another type. Surprise Me makes a random helicopter, Variation changes the current one and New Seed reshuffles the camouflage and small details.
3. The Livery box sets the paint scheme, its three colors, the registration and the title on the tail boom.
4. Rotors & Motion: Spin Rotors and RPM drive the rotors during playback, Spool-Up makes them start slowly. Motion Blur Setup turns on motion blur for Cycles and EEVEE. Doors, the ramp and retractable gear are sliders: Shift+click the buttons next to them to add a keyframe.
5. The closed sections below hold the details: fuselage, tail, main rotor, engine and gear, equipment and weapons, materials and export.
6. For game engines set Detail to Low and use Convert to Mesh; the meshes have UVs, the origin on the ground under the rotor mast and plain Principled BSDF materials.

Scripting

helicopter_generator.generator.create_helicopter(context, "BLACKHAWK", (0, 0, 0)) adds one from a script.