Giorgio Piola's F1 technical analysis
How teams chased 'dirty downforce' gains in Hungary
Formula 1 teams were willing to pay the price for having draggy cars in their pursuit of 'dirty downforce' for the Hungarian Grand Prix weekend.
The Hungaroring is a challenging place for both drivers and engineers alike, and is often described as 'Monaco without the walls'.
It is indeed a high-downforce circuit, very much like other street circuits, but it rubbers in much more like a traditional track.
To further add to the complications, temperatures are often high and that means cooling the brakes and the power unit become a critical factor, resulting in aerodynamic efficiency being sacrificed.
It is a track where extra grip pays off more than straightline efficiency – which is why teams focus more on finding what is known as ‘dirty downforce'.
Here we look at how a few teams approached the challenge.
The Williams FW41 may still be lacking some performance, but the front wing introduced at the last round in Germany has at least made the car more predictable for its drivers.
Keen to push on and add some more performance, the team arrived in Hungary with a new, rather large, T-wing (blue arrow).
The winglet featured two main horizontal surfaces either side of the engine cover, which are hooped together by endplates.
The lower of these two surfaces helps to drive the performance of the airflow travelling over the top of the sidepod’s surface, and the hot air exiting the enlarged cooling outlet that was last used in Bahrain (lower left inset, red arrow).
The upper surface works the airflow a little harder, sitting in relatively the same position as the regular T-wing, and features a slot along its length.
The rear wing also had changes. The mainplane swapped out for a conventional shaping, rather than the ‘spoon’-shaped wing seen elsewhere (green arrow).
This drive to create more downforce had the consequence of more drag, so the team added an extra open-end style louvre to alter the tip vortex being created (purple arrow), reducing drag.
Red Bull gains
Red Bull more usually has to think about its aero efficiency ratio more than the others, given its power deficit to the other frontrunners, but when it comes to the high-downforce tracks we see the team throw caution to the wind.
Just like in Monaco, the RB14 was fitted with a high downforce rear wing and complemented by a T-wing (red arrow) and a small monkey seat winglet (blue arrow).
The role that the monkey seat can play has been drastically curtailed by the FIA for 2018, with the governing body keen to reduce the impact that aerodynamic devices can have on the exhaust, which lies in close proximity.
Nevertheless, Red Bull has, when the need arises, turned back to the aerodynamic appendage in order to overcome any instabilities that may occur when running such an aggressive rear wing.
Most of the field runs a T-wing in one form or another at the majority of the races, teasing a little more downforce and stability from the surface for a negligible quantity of drag.
Eyeing any straightline boost in its quest to beat Mercedes and Ferrari, Red Bull only opts to run one when absolutely necessary.
Force India keeps up the fight
Starved of budget in the opening phase of this season, Force India has slumped back a little, especially when compared with the success it has enjoyed over the last two seasons.
A lack of budget can have a significant impact on the delivery of updates at key points in the season and so it has had to be more cautious about the timing of bringing new parts that help performance.
With aerodynamic efficiency less worrisome at the high-downforce circuits, the team bolted on a pair of double T-wings in Monaco and Hungary, whereas elsewhere it has opted to use just a single element (inset, red arrow).
It also toyed with, but never raced, a small monkey seat winglet hung from the rear wing centre pillar over the exhaust (inset, blue arrow).
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|Teams||Red Bull Racing Shop Now , Force India , Williams|