Brackets and mounts
STEM Racing Season 08 CO2 Car Main Body
- Bounding box
- 200.0 × 65.0 × 47.0 mm
- Engine
- Precision B-rep
- Parameters
- 22
- Published
- October 28, 2026
Download
Free to download and use. See the terms.
The prompt
Create ONE CNC-machinable, editable 3D solid: the main body of a STEM Racing Season 08 CO₂ car. **Goal:** Minimum drag and frontal area, near-zero lift (NO downforce), and minimum safe body mass. **Body rules:** - Maximum length 205 mm; minimum material thickness 3.5 mm everywhere. - Include enclosed virtual cargo, minimum 60 × 55 × 10 mm. - Include the mandatory halo pocket (6.35 mm ball-nose cutter, 3.175 mm depth; pocket bottom 24 mm above track; halo notch centre 34 ± 1 mm above track). - Include legal ballast-container/helmet-access geometry. - Cartridge chamber: diameter 18–18.5 mm, depth 45–58 mm, angle ±3°, surrounding material ≥3.5 mm, cartridge centre height 30–40 mm above track, rear protrusion ≥5 mm. - CNC-machineable from the official Model Block; one continuous solid, no impossible cavities. **ABSOLUTELY NO** wheels, axles, halo, helmet, wings, wing supports, separate nose cone, tether guides, tether holes, mounts, decals or other components. No placeholders. Keep the body compatible with the complete car's 50 g minimum mass, 1.5 mm ground clearance, 65–85 mm width, 65 mm maximum height and 120–140 mm wheelbase. Export a genuine editable STEP solid for Fusion 360. Do not invent dimensions or claim unperformed CFD testing. **Main body only. Nothing else.**...car body with least drag, and no downforce
Parameters
| Name | Value | Range |
|---|---|---|
| Overall Body Length | 200 mm | 150 – 205 |
| Body Width | 65 mm | 65 – 85 |
| Ground Clearance | 1.5 mm | 1.5 – 6 |
| Rear Block Height | 47 mm | 40 – 62 |
| Nose Tip Height | 12 mm | 6 – 24 |
| Rear Block Length | 60 mm | 40 – 80 |
| Roll-Hoop Hump End (X) | 76 mm | 60 – 100 |
| Deck End / Nose Start (X) | 155 mm | 120 – 180 |
| Profile Edge Fillet | 2.5 mm | 0 – 5 |
| Halo Pocket Floor Above Track | 24 mm | 18 – 34 |
| Halo Pocket Depth | 3.18 mm | 2 – 6 |
| Halo Notch Centre Above Track | 34 mm | 28 – 44 |
| Ball-Nose Cutter Diameter | 6.35 mm | 4 – 10 |
| Cartridge Chamber Diameter | 18.4 mm | 18 – 18.5 |
| Cartridge Chamber Depth | 55 mm | 45 – 58 |
| Cartridge Centre Above Track | 35 mm | 30 – 40 |
| Virtual Cargo Length | 60 mm | 55 – 90 |
| Virtual Cargo Width | 55 mm | 50 – 60 |
| Virtual Cargo Depth | 10 mm | 10 – 25 |
| Ballast Bore Diameter | 10 mm | 6 – 14 |
| Ballast Bore Depth | 14 mm | 6 – 20 |
| Ballast Bore Spacing (Y) | 40 mm | 24 – 52 |
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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