During the recent NASCAR race at the Circuit of the Americas (COTA), multiple drivers faced critical issues with their cooling suits malfunctioning, resulting in dangerous health situations on the track. One notable incident involved AJ Allmendinger, who required medical assistance and was placed in a supine position as a precaution after the race.
Not all drivers use cooling suits, and malfunctions are not a constant occurrence. However, when these suits fail, the consequences can be severe, as the devices are essential for managing intense heat during races.
Denny Hamlin’s Insight into the Causes of Cool Suit Failures
Denny Hamlin addressed the problem on the Actions Detrimental podcast, explaining how the cooling shirt technology can sometimes backfire. He linked the failures primarily to the way heat accumulates inside the cars when their speeds drop, especially during caution periods.
Hamlin illustrated the issue by describing how airflow diminishes at slower speeds, causing heat to become trapped within the vehicle’s cockpit. Without sufficient air circulating, the cooling suits can overheat and stop functioning properly.
“It seemed like there was some cool shirt issues, and that’s definitely the downside to it is that if it does not work it is worse than not having it at all,”
Hamlin said.
“I think the car heat soaks. That’s what I think is causing these things to go bad, is that they’re going out when temperatures are up.”
He elaborated on the mechanisms behind this phenomenon:
“Once the car goes to caution, all the heat gets trapped inside because you’re not cutting through the air,”
Hamlin stated.
“You’re not having the air push that hot air. It’s like having a fan on an ice cube. You’re driving, it’s blowing and that gives you cool air. Well once you go caution, your car stops going fast, you shut the fan off. Then you don’t have that cube pushing air onto you anymore. In the hot sense, right, the car just gets really, really hot during cautions. And I think that’s when these cool units are failing. They’re getting overheated and tripping, and that’s when they’re out for the count.”
Hamlin’s Own Experience and View on Cool Suit Usage
Despite his detailed understanding of cooling suits, Hamlin does not use one himself, which meant he did not experience the heat-related struggles during Sunday’s event. Still, he sympathizes with those who rely on the devices when they stop working under extreme conditions.
“I know it makes a lot of guys feel certainly better and what not,”
Hamlin acknowledged.
“I think I’ve just, my body’s just gotten used to it from doing this for so long that just the heat doesn’t really bother me.”
Challenges in Finding a Solution Amid NASCAR’s Regulations
When asked about potential fixes to prevent cooling suit failures, Hamlin expressed uncertainty, noting that NASCAR’s strict rules on airflow pose significant challenges for teams trying to keep drivers cool without compromising regulations.
I don’t know, he commented.
“I know that NASCAR’s very, very strict with these teams on restricting airflow to the drivers and their cool units. … All I know is that NASCAR really frowns upon diverting any air that should be going to the driver.”
The Broader Impact of Cooling System Problems on NASCAR Driving Conditions
These recurring cool suit malfunctions highlight the intense heat challenges NASCAR drivers face, particularly at events like COTA where ambient temperatures and car dynamics combine to create a hazardous environment inside the cockpit. The inability of cooling systems to reliably function during slower race phases, such as caution laps, significantly increases risks to driver health and safety.
Moving forward, this issue underscores the urgency for NASCAR and involved teams to explore engineering solutions or regulation adjustments that could better protect drivers from heat stress without infringing on competitive rules. Meanwhile, drivers like Denny Hamlin continue to endure the physical demands of racing, whether relying on cooling suits or their own heat acclimation.
