This assembled four-blade utility helicopter is supplied as a static modelling and display subject. The inspected native scene includes the fuselage, framed cockpit and cabin windows, long tail boom, tail surfaces and rotor, main rotor and hub, exhaust openings, landing skids and small exterior fittings. Its blue finish, weathered panel artwork, rotor markings and number 238 come from the supplied appearance resources. They are retained as source artwork; a particular historical aircraft, operator or paint standard has not been independently established. No flying mechanism, motor installation, working rotor or physical build is claimed.

DOWNLOADS AND NATIVE VARIANTS
The coloured 3MF and binary STL are complete display derivatives of the inspected native FBX scene. The 3MF uses a compact facet-colour approximation of the supplied texture artwork; the STL contains geometry without paint. The complete ZIP preserves every supplied native FBX, OBJ, MTL, 3DS and STL variant, all 24 supplied image resources, and an additional Blender inspection scene with functional relative texture links. The full source variants are retained individually: they have different mesh counts, tessellation and unit conventions and are not presented as interchangeable copies of one file. Random file identifiers organise the downloads; the included English inventory explains each file's role. The source package was not altered on disk.

DISPLAY DIMENSIONS AND SCALE
The prepared 3MF and matching display STL are uniformly sized to a selected 250 mm overall bounding length in the illustrated static rotor pose. Their measured bounds are approximately 187.64 mm wide, 250.00 mm long and 67.34 mm high. This is a chosen miniature size, not a verified historical scale or the unit setting of every native variant. The 3MF explicitly uses millimetres; STL stores no unit declaration, so choose millimetres when importing the display STL. Inspect the separate native formats' dimensions before conversion. For another display size, use target length divided by 250 multiplied by 100; a 200 mm target uses 80%. Resizing also changes the thickness of blades, skids, frames and small fittings. No particular 1:48, 1:72 or other historical scale is certified.

PRINTING AND ASSEMBLY NOTES - UNTESTED
This is an assembled display mesh, not a documented snap-fit kit or a tested support layout. Examine intersections, open boundaries, disconnected shells, normals, wall thickness and slender features in a slicer before printing. Native object separation is not evidence that the parts fit together or form printable solids. The full display files retain fourteen zero-area source facets; use a working copy for any repair, and keep the complete native resources as references. The original source STL is also preserved separately.

Rotor blades, hub details, tail rotor, aerials, skid struts and cockpit framing need particular attention. Consider splitting a working copy into manageable sections and planning hidden assembly joints, supports and reinforcement appropriate to your equipment. Keep supports away from visible window and painted panel detail where practical, and test a representative thin feature first. As initial experiments only, fine FDM layers around 0.12-0.20 mm or resin layers around 0.03-0.05 mm may be evaluated on suitable equipment. These are not measured settings for this model; material, orientation, support density, exposure, temperature and tolerances remain to be established by the maker. Enlarging a display can help preserve features that become too thin at a smaller size.

FINISHING, IMAGES AND RIGHTS
Check the supplied colour maps and native scene when masking the blue finish and markings. Prepare a sample before choosing primer, paint or clear coat, and protect thin geometry during sanding and support removal. The two finished-display images use the actual upright native model render over a workshop background generated by AI locally on the PC. The aircraft geometry and opaque rendered pixels were protected from AI redrawing. The wooden board is illustration context and is not part of the helicopter downloads. These images are digital illustrations, not photographs of a physical print. Published by Tomás Piernas, free under the account holder's explicit CC0 authorisation. Original design authorship was not independently identified; necessary technical identifiers and supplied notices are retained. Printing, fit and operation have not been physically tested.

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