3D preview of F-4 Phantom Centre-Fuselage Frame (Open, Tapered)
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Interactive 3D model of F-4 Phantom Centre-Fuselage Frame (Open, Tapered)

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F-4 Phantom Centre-Fuselage Frame (Open, Tapered)

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Bounding box
332.3 × 104.0 × 53.0 mm
Engine
Precision B-rep
Parameters
35
Published
September 12, 2026

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The prompt

Modify the existing model. Keep the current open-frame structure. Make the fuselage widest through the middle wing-root area and slightly narrower at the front and rear. Flatten the underside further. Make the upper fuselage narrower than the lower fuselage. Replace the irregular internal braces with one straight main wing spar passing horizontally through the fuselage and one smaller rear spar behind it. Keep all formers aligned perpendicular to the fuselage centreline. Do not add outer skin.

Parameters

NameValueRange
Fuselage Length320 mm120 – 600
Max Width (Widest Point)44 mm20 – 120
Body Height48 mm20 – 120
Lower Fuselage Width42 mm12 – 120
Upper Fuselage Width24 mm12 – 120
Belly Corner Chamfer5 mm0.5 – 20
Top Corner Chamfer6 mm0.5 – 20
Height of Widest Point-10 mm-60 – 20
Wing-Root Station (frac of length)0.420.15 – 0.85
Nose Width Scale0.750.4 – 1
Tail Width Scale0.850.4 – 1
Former Count52 – 12
Former Thickness4 mm1 – 20
Former Rim / Wall Width4 mm1 – 15
Stringer Count62 – 16
Stringer Size2 mm0.5 – 10
Stringer Faceting Segments124 – 48
Top Spine Width10 mm2 – 40
Top Spine Height6 mm2 – 30
Main Spar Chord14 mm2 – 60
Main Spar Depth34 mm2 – 120
Main Spar Span Extension30 mm0 – 200
Main Spar X Position130 mm5 – 600
Main Spar Z Position0 mm-60 – 60
Rear Spar Chord8 mm2 – 60
Rear Spar Depth20 mm2 – 120
Rear Spar Span Extension20 mm0 – 200
Rear Spar X Position200 mm5 – 600
Rear Spar Z Position0 mm-60 – 60
Engine Duct Diameter16 mm2 – 60
Engine Duct Y Offset13 mm0 – 60
Engine Duct Z Offset-12 mm-60 – 60
Alignment Pin Diameter4 mm0.5 – 20
Alignment Pin Length12 mm1 – 60
Alignment Pin Count30 – 6

Every value above is a live dimension. Open a model like this in the editor and each one becomes a slider you can drag before exporting.

F-4 Phantom Centre-Fuselage Frame (Open, Tapered) - Free CAD Model (STEP, STL) | TextoCAD