Haas

The 2026 Technical Regulations introduce a revised layout for the Floor.

The 2026 floor architecture features a predominantly flat underbody, with only a limited allowance for front inboard devices and a floorboard as defined by the regulations. Our geometry incorporates a substantial vertical vane to condition and manage the tyre-wake structures, complemented by a series of horizontal aerofoils that promote localised load extraction. This combination enhances vortex stability, preserves floor sealing, and improves the underfloor mass-flow distribution.

The 2026 Technical Regulations introduce a revised layout for the diffuser geometry.

The 2026 diffuser incorporates a single primary fence per side, while the FIA-mandated outboard devices—previously mounted to the rear corner assemblies up to 2025—are now integrated directly into the outboard diffuser structure. The central expansion volume extends laterally alongside the rear impact structure, maximising underfloor mass-flow extraction and enhancing the diffuser’s overall pressure-recovery efficiency.

The 2026 Technical Regulations allow for a three‑element upper Rear Wing configuration within a reduced legality volume compared to previous seasons.

Haas employs a three-element upper rear-wing assembly, with the SM mechanism providing simultaneous actuation of both flap elements. The mainplane is configured with a relatively low camber, while the flap cluster adopts an aggressive geometry to maximise downforce generation in Corner Mode (CM). In Straight Mode (SM), the system targets a substantial drag reduction by unloading the flap pair and exploiting the flat mainplane to minimise pressure-drag contribution

The 2026 Technical Regulations allow only a simplified lower-wing element.

The 2026 rear-structure geometry is deliberately simplified in compliance with the regulatory constraints. The beam wing is aligned with the incoming flow and functions primarily as a structural and aerodynamic interface, supporting both the floor assembly and the upper rear-wing system.

The 2026 Technical Regulations introduce a revised layout for the Front Wings Haas features a three-element wing.

The newly introduced SM Adjuster is positioned on the centerline beneath the nose and actuates both flap elements. The geometries have been optimized to deliver high load in Corner Mode and reduced drag in Straight Mode.

The 2026 Technical Regulations introduce a revised layout for the Front Wing Endplates.

The endplate is engineered for optimal tyre-wake control, incorporating a high-mounted diveplane and a channelled footplate to enhance local flow conditioning and improve downstream aerodynamic flow.

The 2026 Technical Regulations introduce a revised layout for the Floor Edge.

The floor edge incorporates a multi-slot geometry combined with an upper fence, engineered to mitigate tyre-contact-patch–induced pressure losses and reinforce the robustness of the floor’s sealing vortex system. This configuration enhances shear-layer stability, preserves underfloor mass-flow continuity, and reduces the susceptibility of the diffuser to wake-related load drop-off.

Small winglet placed on top of the Rear Impact Structure The winglet is shaped to promote upwash, which in turn improves the local aerodynamic characteristics and results in a corresponding increase in load.

The FW SM actuation system was simplified allowing smaller exposed geometries The FW SM linkage was simplified, enabling a reduced external envelope.

The smaller linkages decrease blockage and consequently improve the airflow directed towards the rear of the car.

Device added on Floor Winglet The additional device on the Floor Winglet results in an increase in local aerodynamic downforce by modifying the pressure distribution and flow behaviour around the element.

Revised Sidepod Inlet The revised bodywork enables a more pronounced undercut along the lower surfaces, which, combined with increased top‑surface downwash, channels higher‑energy airflow towards the rear of the car, allowing the bespoke floor design to operate more efficiently.

Revised floor geometry, with new floor board, new floor edge splits and a more aggressive diffuser promoting up- and side-wash The new floor was developed in conjunction with the updated bodywork.

Its geometries are optimised to guide higher‑energy airflow through the floor volume, enhancing mass flow and stability, and promoting more efficient extraction and overall load generation.

Optimized suspension faring design The updated floor and bodywork required a realignment of the suspension fairings, enabling improved flow conditioning in this region and extracting additional performance from the overall package.

Revised winglet geometry on the inboard drum face The modified incoming flow field required a realignment of the inboard drum devices to maintain their aerodynamic effectiveness and ensure consistent performance within the updated overall flow conditions.

Undercut and top downwash

Front Trackrod position A slight modification to the front trackrod geometry was required in order to comply with the specific steering angle demands imposed by the characteristics of this circuit.

SM Fairing geometry change A minor revision to the RW SM fairing aimed at inducing localized upwash, providing a small but beneficial contribution to meeting the circuit’s high downforce demands.

Additional device on RIS top surface An additional aerodynamic device was installed downstream of the exhaust tailpipe, with the primary objective of encouraging local upwash and consequently enhancing the generation of localized downforce in that region.

Simplified Rear Impact Structure geometry An alternative Rear Impact Structure device will be available on track, enabling targeted tuning of the car’s characteristics for this circuit.

Revised Front Brake Duct design The FBD geometry was refined to provide a smoother flow path, reducing local losses and improving downstream flow quality towards the rear of the car.

The revised scoop configuration required a concurrent optimisation of the suspension leg fairings to preserve aerodynamic efficiency.

Additional Gill option The circuit-specific operating conditions required an additional increase in cooling capacity, achieved through the introduction of two additional apertures on the upper surface of the sidepod.

New Rear Wing profiles The rear wing profiles were comprehensively revised, with particular emphasis placed on the optimisation of flap geometry, leading to an increase in aerodynamic load while preserving a high level of overall efficiency across the operating range.

Rear Wing Endplate with external protrusions

The Rear Wing Endplates were refined through the introduction of localized protrusions aimed at promoting upwash, contributing to the increase of load of this assembly.

Revised Endplate geometry A revised Front Wing endplate geometry has been introduced to complement the updated Front Wing profiles, optimising local airflow control and maintaining aerodynamic efficiency across the front wing assembly.

Marginal geometry changes to deflector A circuit-specific Front Corner configuration has been made available, providing additional flexibility to better match the aerodynamic load requirements of this circuit.

Revised lower Rear Wing geometry A new Lower Rear Wing configuration has been introduced as a circuit-specific option, providing additional flexibility to align the car’s aerodynamic characteristics with the demands of this venue and optimise overall performance.

Revised Profiles and Pylon geometry A revised Front Wing geometry has been introduced to increase local aerodynamic load while maintaining aerodynamic efficiency, improving airflow management and overall front- end performance across a range of operating conditions.

Rear Wing SM Fairing optimization and new Rear Wing gurney-flap The revised SM Fairing increases local aerodynamic loading and, in combination with a more aggressive Gurney flap configuration, contributes to increased rear wing downforce.

New Front Floor - new side geometry and diffuser update The floor update focuses on optimising the main expansion region and associated side geometry to improve airflow behaviour throughout the floor. The revised design increases floor efficiency, delivering a net gain in overall aerodynamic performance and downforce production.

New Sidepod and coke-line. Narrower Roll-Hoop and updated engine cover The revised bodywork has been developed in conjunction with the new floor design to maximise the aerodynamic benefit of the floor package. The updated geometry improves airflow management around the car while providing the necessary cooling performance for all operating conditions.

Realigned rear suspension fairings and drum deflectors The aerodynamic changes introduced by the new floor and bodywork package alter the flow structures reaching the rear corner region.

To accommodate these changes and maximise the benefit of the update, the rear corner fairings have been re-optimised and the rear drum deflectors realigned, improving local flow management and overall aerodynamic efficiency.

Bearman caveated his praise of the new upgrade package - giving him more downforce through corners and more confidence throughout - with the fact that Saturday will be about slipstreams and track position.