Kate McKenna lived in a world of millimeters. In Formula 1, a millimeter was the difference between a championship-winning floor and a piece of expensive debris that stalled in a high-speed corner. She saw people not as personalities, but as volumes—occupants of a survival cell who needed to be packaged as tightly as possible to allow for the aerodynamicists to have their way with the car's exterior.
"Is the resin temperature stable?" she asked, not looking away from the CAD screen.
"Holding at twenty-two degrees, Kate," a junior engineer replied.
The "bead seat" process was a messy, intimate ritual. It involved a large plastic bag filled with thousands of tiny polystyrene beads and a two-part epoxy resin. The driver would sit in the bag inside the cockpit, the air would be vacuumed out, and the resin would harden around their body, creating a perfect, rigid mold. It was a second skin.
Kate heard the heavy security door at the end of the bay hiss open. She didn't have to look up to know who it was. The air in the room changed. There was the smell of the London rain clinging to a wool coat, and the heavy, slow footfalls of someone who wasn't in a hurry to prove anything.
Sonny Hayes looked smaller than he did on the old tapes. In the grainy footage of the nineties, he looked like a titan. In the harsh LED light of the Brackley factory, he looked like a man who had spent too much time in the sun and not enough time sleeping. He was wearing a plain dark sweater and jeans, his silver hair still damp.
"Mr. Hayes," Kate said, finally looking up. She offered a hand. His grip was dry, steady, and surprisingly powerful. "I'm Kate McKenna, Lead Engineer. We've met before, briefly, at the gala in 2018."
"I remember," Sonny said. His voice was a low, melodic rasp. "You were the one arguing with the FIA technical delegate about the bargeboard flex. I liked your data. I didn't like your dress."
Kate felt a flicker of a smile—the first one in a week. "The dress was a requirement of the sponsors. The data was a requirement of physics. I prefer the latter."
"Me too." Sonny turned his gaze to the car. He walked toward it slowly, his eyes tracing the lines of the exposed suspension and the intricate weaving of the carbon fiber tub. He didn't touch it. He looked at it with the cautious respect one might give a sleeping predator. "She's tight. Narrower through the hips than the cars I remember."
"Aerodynamics," Kate explained. "We shrink-wrap the chassis to keep the airflow as clean as possible. It makes the cockpit a bit of a challenge for anyone over twenty-five."
"I've got a few years on twenty-five," Sonny murmured.
"More like thirty-five," a sharp voice cut through the room.
Joshua Pearce sauntered into the bay, his hands buried in the pockets of a designer tracksuit. He didn't look at Kate. He looked at Sonny with a calculated, bored indifference. "You the new development driver? Or did Ruben hire a museum curator?"
Sonny didn't flinch. He didn't even turn around. He kept his eyes on the pedal box of the APXGP-01. "The pedal throw is too long," he said quietly.
Joshua let out a short, mocking laugh. "The throw is exactly where the simulator says it should be for maximum modulation. It's calibrated to the millisecond, Gramps. Maybe your ankles are just getting stiff."
Sonny finally turned. He didn't look angry; he looked curious, like a scientist examining a particularly loud species of bird. "The simulator doesn't account for the vibration of the floor at three hundred kilometers an hour, kid. If the throw is too long, you're searching for the bite point while the car is dancing under you. You're losing five-hundredths on every downshift because you're waiting for the mechanical connection."
Kate felt a jolt of interest. That was exactly what the telemetry had been hinting at—a slight inconsistency in Joshua's brake pressure in the heavy braking zones—but Joshua had insisted it was a sensor glitch.
"We're doing the seat fit, Josh," Kate said firmly. "Unless you have something constructive to contribute to the ergonomic layout, go find a gym."
Joshua rolled his eyes but stayed, leaning against a tool chest. He wanted to watch the old man struggle.
Sonny stripped down to his fireproof undersuit. Kate noticed the scars Dr. Aris had mentioned, but seeing them in person was different. They weren't just injuries; they were a history of high-speed violence. He climbed into the "tub" with a grunt, his movements stiff until he settled into the cockpit.
"Ready for the resin," Kate commanded.
The technicians placed the bag behind him. Sonny leaned back into the chemical sludge. He had to hold a perfectly still racing position for twenty minutes while the foam hardened. It was a claustrophobic, hot, and deeply uncomfortable process.
As the vacuum pump began to whine, sucking the air out of the bag, Sonny's face went blank. He entered a trance-like state, his eyes fixed on the steering wheel rack.
"Check the line of sight," Kate said, leaning over the sidepod. "Can you see the apex of a left-hander over the halo?"
"The halo is a blind spot," Sonny said, his voice muffled by the cockpit walls. "But it's not the halo that's the problem. It's the rake of the seat. You've got me sitting like I'm in a recliner. I need to be more upright. My inner ear needs to be aligned with the center of gravity of the car, not behind it."
"If we move you up, the center of gravity rises," Kate countered. "We lose aerodynamic efficiency."
"And you lose the driver's ability to feel the rear tires sliding," Sonny replied. He reached out and touched the steering column. "Give me two degrees of tilt. I want to feel the steering rack in my forearms, not my shoulders."
Joshua snorted. "Two degrees? You think you can feel two degrees through a power-steering rack that's doing ninety percent of the work?"
"I can feel a pebble if I run over it with the front-right, Joshua," Sonny said, his eyes still closed as the resin heat peaked. "Can you?"
Joshua's face flushed. He opened his mouth to retort, but Kate held up a hand.
"Quiet," she snapped. She was looking at the CAD overlay on her tablet. If she tilted the seat as Sonny requested, it actually cleared up a small turbulence issue in the cockpit air-intake. It was a trade-off she hadn't considered because she had been so focused on keeping the driver's head as low as possible.
The twenty minutes passed in a tense silence. When the seat was finally "cured," the technicians hauled the hard, gray mold out of the car. Sonny climbed out, his undersuit drenched in sweat, his face pale.
He walked over to the workbench where the seat mold lay. He ran his hand over the indentations of his own spine.
"Kate," he said.
"Yes?"
"The steering wheel. The buttons. They're too small."
"They're standard FIA size," she said.
"They're built for fingers that haven't been broken four times," Sonny said, holding up his left hand. The ring finger and pinky were slightly crooked, a permanent reminder of a steering wheel kickback in 1992. "I can't find the 'Talk' button or the ERS-deploy by feel in the dark. I have to look down. And if I'm looking down at three hundred, I'm not looking at the track."
Kate looked at his hands. She looked at the scars. She realized she had been designing a car for a perfect, idealized human body—the kind of body Joshua had. She hadn't been designing it for a man who was held together by grit and scar tissue.
"I'll custom-print the button caps," Kate said. "We'll give them different textures. Knurled for the radio, smooth for the ERS. You'll be able to read the wheel like braille."
Sonny nodded, a small flash of appreciation in his eyes. "Thank you, Kate."
He turned to leave, but stopped in front of Joshua. The rookie didn't move, trying to maintain his wall of arrogance.
"The car isn't your enemy, Joshua," Sonny said quietly. "Stop trying to beat it into submission. It's a tool. If you don't learn how to hold it properly, it's eventually going to cut you."
Sonny walked out, leaving a heavy silence in the bay.
Joshua waited until the door clicked shut before turning to Kate. "He's a freak. A fossil. You're actually going to listen to him about the seat tilt?"
Kate looked at the CAD screen, then back at the empty cockpit of the APXGP-01. For the first time in months, she felt a flicker of something other than technical exhaustion. She felt hope.
"I'm going to listen to him because he just gave me three technical solutions for problems you didn't even know we had," Kate said, picking up her calipers. "Now get out of my bay. I have a car to build."