This complete propeller-engine scene is intended for aviation miniatures, educational displays and workshop dioramas. Visible features include a two-blade propeller and spinner, a detailed engine body, partly open white casing, pipes, cables and mounting elements. This is a digital display resource, not a tested working engine or a certified ready-to-print kit.

DOWNLOAD CONTENTS
The two downloads retain the full-resolution linked OBJ and the complete resource ZIP. The source mesh contains 1,000,106 triangles. Its material library, supplied image resources, English preparation notes and inventory remain available under opaque filenames. Keep the OBJ, MTL and textures together. The archive includes the earlier direct-render reference; the current public cover is a later AI-assisted presentation described below. Neither illustration adds printable parts to the supplied engine.

GEOMETRY AND INTERACTIVE VIEWER
The supplied OBJ reopens as one surface mesh with its existing face assignments, UV coordinates and linked textures. A scene mesh count does not establish that each pictured mechanical element is an independent printable component. Relative source geometry is preserved. The public viewer uses a separate 120,000-triangle, approximately 6 MB display derivative. Its common orientation places the propeller shaft horizontally and the lower casing below the engine. The full downloadable mesh remains unchanged. Viewer dimensions are normalized display coordinates, not verified real-world measurements. Use the full source for fabrication planning.

MATERIALS AND PROPOSED FINISH
The engine body retains the supplied texture appearance: white casing, dark and olive metal, red-orange wiring and a metallic spinner. The cover proposes dark paint on the existing propeller surfaces instead of their original granite bitmap. This is a presentation-only material override; the original bitmap remains in the download. Apparent labels, seams and small mechanical details can be texture artwork rather than raised printable geometry. Inspect the untextured mesh and slicer before expecting those details in a physical print.

DIMENSIONS AND SCALE
No verified real-world engine dimensions, source coordinate-unit convention or scale ratio is provided. Do not infer 1:24, 1:32 or another scale from the image, display board or normalized viewer. Establish one reliable target dimension, measure the full imported mesh and apply a uniform scale deliberately. Check the thinnest blade edges, cables and gaps at the intended size. Resizing affects fragility and printer resolution requirements.

PRINT PREPARATION — UNTESTED
No physical print, mechanical function, watertightness certification or successful support layout is claimed. Inspect connectivity, normals, non-manifold edges, intersections and thin regions in your own mesh tools and slicer. Rendering topology may need preparation for fabrication; retain an untouched copy before repairs. The interactive derivative is for display, not the preferred print master.

Resin layers around 0.03-0.05 mm or FDM layers around 0.12-0.20 mm may be initial trial ranges when geometry, final size and equipment permit. These are conditional suggestions, not tested presets. Balance propeller strength, support accessibility and protection of visible details. Review overhangs and any trapped-volume risks. No exposure, temperature, speed, infill, clearance or support pattern has been validated. Remove supports gradually and avoid force on fine cables or blade edges. Test adhesive, primer and paint compatibility on samples; thin coats preserve actual surface detail.

IMAGE TRANSPARENCY
The cover combines a local Blender rendering of the complete source engine with a previously generated local-PC ComfyUI/Qwen workshop background. Verified masks preserve every protected engine, board and support pixel exactly. The engine geometry was not generated or redesigned by image AI. The dark propeller paint is the explicit finish proposal above. The separate board and workshop support are illustrative scenery, not extra downloadable engine parts or verified fabrication instructions. This is an AI-assisted illustration, not a photograph of a physical build. The older archive reference remains an explicitly different direct-render presentation.

RIGHTS AND ATTRIBUTION
Published free under CC0 following the uploader's express authorization. Original design authorship is not claimed. Legitimate source notices and necessary technical identifiers remain. Opaque filenames cannot guarantee that the design or its geometry is unrecognizable.

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