The workshop brims with the steady thrum of computers, the scent of resin and carbon dust, and the hush that falls whenever a simulation resolves. Ben glances sideways at the screen, his heart tapping faster as the pressure graphs animate. The new side pod configuration—wider at the leading edge, pinched at the middle, blooming out at the rear—shows the telltale dip in static pressure he’s been chasing. On another monitor, streamline visuals blush in shifting colors, a river of velocity clinging close to the surface, then fanning out in a controlled burst as it negotiates the exit curve.
Anya leans in, her fingertips hovering over the pressure tap data. “Look at that midsection,” she murmurs, voice taut with satisfaction. “That’s the sweet spot. Add the numbers up and we’ve lost almost half the drag penalty we expected.”
Ben’s mind races ahead, sketching out the potential. Side pods that compress and expand air, harnessing the same principles as the classic venturi, but wrapped around the car instead of underneath it. If the data holds, this will be the template for the rest of the car’s rear architecture.
The next phase beckons: adapting the compression-expansion geometry to the rear wing and diffuser. Ben begins by drafting a rear wing with a central narrowed span—a section that pinches airflow just behind the central pillar, then expands outboard into gracefully arched endplates. He imagines a wing that doesn’t just cut air, but sculpts it, compressing before easing it outward in an energetic sweep. With a few deft clicks, he imports the side pod’s pressure gradient as a reference, aligning the wing’s pinch and flare with the upwash so that the air, already primed by the side pod, is redirected for maximal effect.
Marcus stands at Ben’s shoulder, arms crossed. “Remember, the CFD is a tool, not a promise. The tunnel will tell us the truth.”
Anya doesn’t look away from the display. “If we can get the rear wing to maintain attached flow through the pinch, we could cheat the drag equation and get more usable downforce. I want three versions: one conventional, one with a mild central pinch, and one as extreme as we dare.”
The hours pass in a rush of digital fabrication. By nightfall, the three rear wing configurations are ready for virtual wind tunnel runs. Ben queues them up, the simulation’s progress bar inching forward while the workshop’s lights throw long shadows over scattered sketches and coffee mugs. Data begins to appear—numbers and contours, evidence of airflow either guided or wasted, pressure regions mapping a hidden dance above carbon fiber.
Meanwhile, Anya turns her attention to the underbody. The rear diffuser, she reasons, should mirror the side pod’s logic. Where the conventional path would use a steady ramp, she introduces a gentle pinch at the diffuser throat before flaring the exit more aggressively. CFD predicts a localized acceleration, a low-pressure zone that draws the car downward—provided separation doesn’t occur too early.
Ben watches the velocity vectors arch and sweep, the colors shifting as the simulated air obeys or rebels. The results are promising, but not perfect—one wing version delivers tremendous downforce but threatens to stall at high yaw angles; the diffuser’s new flare creates vortices that, if uncontrolled, could undercut gains. Still, the principle holds: compress, then expand. Squeeze more from every molecule of rushing air.
A sudden ping draws Ben’s eyes to the simulation logs—a flagged anomaly. One configuration shows a pressure spike at the diffuser exit, a signature of recirculation. If left unchecked, it could mean disaster on track: unpredictable handling, sudden losses of grip. The team crowds the screens, breath held, knowing that the next move is critical.
Ben’s hand hovers over the control, ready to revise the model or run deeper diagnostics. The workshop falls silent, tension mounting. The future of the concept—of the entire car—balances on the edge of a single choice.