Brackets and mounts
918-Style Mid-Engine Supercar Chassis Skeleton
- Bounding box
- 4250.0 × 1650.0 × 873.0 mm
- Engine
- Precision B-rep
- Parameters
- 40
- Published
- October 7, 2026
Download
Free to download and use. See the terms.
The prompt
Create a realistic, manufacturable **automotive chassis inspired by the Porsche 918 Spyder**, but do not copy proprietary CAD. Generate **ONLY the structural chassis** — no exterior body panels, doors, hood, fenders, glass, interior, seats, or cosmetic parts. Design it as a **mid-engine, two-seat supercar chassis** with: * Main longitudinal frame members * Strong front and rear structures * Rigid central passenger safety cell * Crossmembers and triangulated reinforcements * Front and rear suspension hardpoints * Steering rack mounting * Engine/transmission mounting points * Seat and seat-belt mounting points * Brake and battery/fuel mounting provisions * Tow and jacking points * Gussets and reinforcement plates in high-load areas Make it **physically manufacturable**, using realistic automotive-grade steel/aluminum, realistic wall thicknesses, weldable joints, CNC-cut/bent plates, tubes, and bolt-on brackets. Prioritize **high torsional rigidity, structural strength, low unnecessary weight, continuous load paths, and realistic load distribution**. Use realistic dimensions for a 918-sized supercar and make all major components clean 3D solids suitable for later **FEA, stress, fatigue, and crash analysis**. The result should look like the **bare structural skeleton of a high-performance mid-engine supercar**, ready to be developed by an automotive engineer for real-world fabrication.
Parameters
| Name | Value | Range |
|---|---|---|
| Safety Cell Length | 1200 mm | 600 – 1800 |
| Safety Cell Width | 800 mm | 400 – 1200 |
| Safety Cell Height | 500 mm | 300 – 800 |
| Safety Cell Wall Thickness | 3 mm | 2 – 8 |
| Main Longitudinal Rail Length | 4200 mm | 2000 – 6000 |
| Main Rail Cross-Section Width | 50 mm | 30 – 100 |
| Main Rail Cross-Section Height | 100 mm | 50 – 200 |
| Main Rail Wall Thickness | 2.5 mm | 1 – 6 |
| Rail Lightening Hole Diameter | 25 mm | 10 – 50 |
| Rail Lightening Hole Count | 10 mm | 0 – 30 |
| Front Subframe Length | 1000 mm | 500 – 2000 |
| Front Subframe Width | 1200 mm | 600 – 1800 |
| Front Subframe Height | 400 mm | 200 – 700 |
| Front Subframe Wall Thickness | 2.5 mm | 2 – 8 |
| Rear Subframe Length | 1100 mm | 500 – 2000 |
| Rear Subframe Width | 1200 mm | 600 – 1800 |
| Rear Subframe Height | 500 mm | 200 – 700 |
| Rear Subframe Wall Thickness | 2.5 mm | 2 – 8 |
| Front Crossmember Width | 1200 mm | 600 – 2000 |
| Rear Crossmember Width | 1000 mm | 600 – 2000 |
| Crossmember Cross-Section Depth | 50 mm | 30 – 100 |
| Crossmember Cross-Section Height | 100 mm | 50 – 200 |
| Crossmember Wall Thickness | 3 mm | 1 – 6 |
| Floor Pan Thickness | 3 mm | 1 – 8 |
| Roll Hoop Tube OD | 40 mm | 20 – 80 |
| Roll Hoop Tube Wall | 2.5 mm | 1 – 6 |
| Roll Hoop Width | 700 mm | 400 – 1000 |
| Roll Hoop Height Above Cell | 350 mm | 100 – 600 |
| Seat Rail Length | 500 mm | 300 – 800 |
| Seat Rail Width | 50 mm | 30 – 100 |
| Seat Rail Thickness | 5 mm | 2 – 10 |
| Seat Rail Lateral Spacing | 200 mm | 100 – 350 |
| Suspension Bracket Length | 80 mm | 40 – 150 |
| Suspension Bracket Width | 60 mm | 30 – 120 |
| Suspension Bracket Thickness | 12 mm | 5 – 20 |
| Suspension Bracket Hole Diameter | 10 mm | 5 – 20 |
| Battery/Fuel Box Length | 600 mm | 300 – 1000 |
| Battery/Fuel Box Width | 400 mm | 200 – 800 |
| Battery/Fuel Box Height | 300 mm | 150 – 500 |
| Battery/Fuel Box Wall Thickness | 3 mm | 2 – 8 |
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.
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