Coaxial-Rotor Helicopter - Display Model and Native Variants

OVERVIEW
This coaxial-rotor helicopter display project preserves a complete airframe with two rotor levels, original rotor blades, tail surfaces, landing wheels, cockpit glazing, short wings and existing mounted details. The finished illustration uses the supplied blue-grey body, pale nose, dark glazing and original markings. It shows the model upright on an illustrative plinth in a hobby workshop. The image is a digital presentation rather than evidence of a physically printed, assembled or flight-tested miniature.

DOWNLOAD CONTENTS
Two ZIP archives preserve two separately retained native resource versions. Each archive contains its own editable FBX and Blender scene, twenty-seven associated appearance resources, both retained OBJ viewing alternatives, an English guide, an integrity manifest, CC0 information and the current presentation image. The archives are alternative resource versions rather than parts intended to be combined into one assembly. The manifest identifies each neutral filename and its role. An earlier unbound presentation photograph is retained privately rather than reused as the finished cover.

PRESERVATION CHECKS
Both FBX versions are independently reopened before and after neutralization. Both Blender copies are saved and reopened with Blender 5.2. Each native scene retains eighteen mesh objects and 118,944 surface triangles. Numerical geometry, UV coordinates, material assignments, node relationships, hierarchy and decoded bound-image pixels are compared. Previously unresolved texture paths are restored only to supplied resources using format-aware path-field changes; the remaining non-path native data are checked separately. All twenty-seven appearance resources in each archive retain their decoded pixels and effective orientation.

The two public OBJ alternatives are independently preserved. Vertex, face, normal, smoothing and vertex-colour statements retain their original numeric payloads; labels are replaced with independent identifiers. Their arrangements and supplied viewing colours can differ. Neither OBJ is substituted for the other. Native scenes provide the editable appearance resources. Mesh-object counts do not establish a number of independently printable pieces, mechanical fit or working articulation. Original files and private preservation receipts remain archived.

PRINTING PREPARATION - UNTESTED
Open a working copy and confirm units, intended dimensions and printer build volume. Inspect thin rotor blades, rotor hubs, tail edges, landing-gear legs, glazing boundaries, small mounted details, open boundaries and intersecting surfaces. A complete-looking model can still need watertight repairs, thickening, separation or hollowing. Perform those changes only on a copy after examining the actual geometry. Rotor movement, balance, strength, articulation, flight capability and powered operation have not been verified. Do not treat a decorative surface mesh as an airworthy structure.

Untested source geometry. Confirm slicer units, manifoldness, intersecting surfaces and fine-feature thickness. The upright display OBJ is normalized for visualization; use full-resolution source geometry in the corrected package for fabrication checks. No verified physical scale, print settings, assembly fit or flight capability is claimed.

Prepared for display and download. No physical print has been certified.