Technical

ANALYSIS: The fascinating design features – and Red Bull cues – on AlphaTauri’s AT03

Special Contributor

Mark Hughes
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AlphaTauri’s digital rendering of their new AT03 shows a very elegant-looking interpretation of the all-new aero regulations with similar key features to cars already launched by Haas, McLaren and Aston Martin – but combined in a different way.

Compact cooling

It’s apparent from the shaping of the sidepod and engine cover that the Jody Egginton-led technical team have found a very compact cooling arrangement compared to those on the Aston Martin and McLaren.

The AT03 features high-shouldered sidepods, which are both heavily ramped downwards and significantly undercut at the front, without having to raise the radiators up (as per Aston) or forgoing the undercut and using the engine cover bodywork to house much of the cooling channels (as per the McLaren).

That suggests the Honda-based power unit may need less cooling than the Mercedes.

READ MORE: Why AlphaTauri could emerge a dark horse in 2022

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A comparison of the top views of the AlphaTauri AT03 (bottom) and Aston Martin AMR22 (top) illustrating different profiles surrounding the engine covers and front wings.

In terms of suspension, the car has retained the pushrod layout at the front and pullrod at the rear (unlike the McLaren, which has reversed that tradition).

The front wing profile shown (which may not be the one it actually appears with at Barcelona testing) is quite similar to that of the McLaren, with a heavily contoured middle section for each of the four elements, falling away sharply at the ouboard ends, probably to aid easier outwash around the front wheel. However, unlike any of the other cars so far seen, the nose tip extends beyond the bottom element of the wing.

The rectangular radiator inlets at the front of the sidepods, and the sharp-angled bodywork linking them to the sides of the sidepods, is a very similar treatment to that seen on the Aston Martin.

READ MORE: Massive variation and ingenious solutions – What we learned from the first week of 2022 launches

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Sidepod comparison of the AlphaTauri AT03 (L) and McLaren's MCL36 (R)

Rear-end Red Bull Clues

Because AlphaTauri will this year be taking the full 2022 Red Bull mechanical rear end (gearbox, hydraulics and suspension) we can see this is how the RB18 will be packaged, with pullrod activation of the suspension and a more Haas-like relationship between the front axle and sidepods, with the front axle appearing to be slightly further back than on the Aston and McLaren so as to maximise the length of the venturi tunnels in the floor while remaining within the maximum permitted wheelbase.

The implication from the bodywork shaping around the sidepods and engine cover is that, despite both power units sharing the split turbo architecture, with the compressor at the front, the power unit is further forward within the car than on the two Mercedes-powered cars so far revealed. The gearbox casing would therefore be longer.

READ MORE: Horner admits RB18 ‘won’t look very much like’ launch car, as Red Bull prepare to defend drivers’ title

First look: AlphaTauri's AT03

The way that the sidepod downward ramp merges at the back with the upward ramp of the venturi tunnel is quite unusual. The hot air which has just cooled the radiator would not normally be fed into the diffuser area, so it may be possible that upward ramp is internally partitioned with an upper cooling exit and a lower venturi exit.

Last year AlphaTauri punched above their weight and were occasionally the third-fastest car on the grid. But that was with a well-honed design, refined from the 2019 Toro Rosso. Can they maintain such form in the new formula?

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Side view of the AT03, showing the differing set-ups (swipe to see McLaren and Aston Martin's side views)

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