Trunk Spoiler v0.1
Z is direction of travel, X is side force, Y is parallel to gravity. Directional indicator in lower left corner of video references the wind tunnel and not the object- ignore it.
v0.1 improves downforce at 65 mph versus baseline by 32.2%, or 40.6 Newtons, while maintaining the same measured Cd (.299) as baseline.
Trunk Spoiler v0.1 is a trunk-mounted spoiler that attaches to the trunk lip using double-sided tape; 3M VHB- or similar- is preferred.
The pre-split file can be fabricated on any printer with a >250 x 250 x 250 mm build volume. It also features dowel holes which are designed to accept commonly-available .25”/6mm aluminum rod. The monolithic file is one single piece and contains no dowel holes.
Hard-curing epoxy with a thickening additive- such as colloidal silica- is recommended for assembly of the pre-split spoiler although any adhesive that strongly bonds the chosen filament will likely work well.
| Key stats | R-010 | R-001 Model 3 Control |
|---|---|---|
| Frontal Area (m2) | 2.259 | 2.259 |
| Planform Area (m2) | 8.183 | 8.156 |
| Drag Coefficient (Cd) | 0.299 | 0.299 |
| Lift Coefficient (Cl) | 0.073 | 0.107 |
| Force in X | -12.1 Newtons | 8.32 Newtons |
| Force in Y | 85.4 Newtons | 126 Newtons |
| Force in Z | -351 Newtons | -351 Newtons |
| Run | Configuration | Cd | Cl |
|---|---|---|---|
| R-010 |  Trunk Spoiler v0.1Spoiler | 0.299 | 0.073 |
| R-001 |  Model 3 ControlBaseline | 0.299 | 0.107 |
