Red Bull has looked to improve the flow to its radiators, coolers, and ancillaries housed within the sidepods of its RB15 by correcting the shape of the inlet and underbite. The aperture was widened, and the leading edge of the underbite was raised to alter the aspect ratio. This move will not have a significant impact on the volume, ensuring a win-win trade-off between cooling demands and increasing space in the undercut beneath the sidepod to deliver more airflow to the rear of the car. The change in the bodywork geometry around the inlet has brought about changes to the entire sidepod, including the aerodynamic furniture mounted on it, and the geometry of the floor’s edge, which has been subtly re-crafted for enhanced performance.
Modifications have also been made to the rear brake duct fence, with one winglet split into two to better manage the airflow in that region. Red Bull has opted not to introduce newer, low-downforce rear-wing variants for the Baku street circuit but will use the solutions that have proven to be extremely potent, including the same low downforce rear wing option paired with a single-element lower beam wing that was used in Australia.
Mercedes, on the other hand, has focused on smaller alterations as it looks to make up ground on those ahead of it. Changes have been made to the rear wing, with subtle changes to the shape of the endplate and tip section for Azerbaijan to improve airflow and improve the performance of the diffuser, and also to the lower deflector of the rear brake duct. The team has increased the size of its rearward-facing outlet to improve cooling at a demanding circuit, while changes to the fairing on the lower wishbone have been made at the outboard end to improve how the airflow interacts with the floor behind.