W08 vs RB13 vs SF70H: Technical Analysis
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The two testing sessions are over and in a week’s time the cars will hit the track in Melbourne and the season will be underway. The regulation overhaul means that everyone has started from scratch (more or less) and the pecking order is unknown. While true performance levels of individual cars won’t be known until Australia, we can still dig a little bit into images and spec sheet to gauge and assesses the 2017 technical marvels. The top 3 team are the best and most intriguing of the lot. So let’s head out and take a look.
W08
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Nose and front wing
The nose, although similar to the 2016 car in stature, is another matter. Although the slender mounts have been outlawed for this year the camera pods remain in a similar position and sit upon almost identical vanes, only shorter. The S-duct is also a carry-over feature. Its design moves away from the simple exit slot utilised previously and instead follows what McLaren have been doing by embedding the car’s antenna in the middle and creating two deeper grooves.
Turning wanes
Perforated bodywork already looks like being a strong theme in 2017. It’s used to create elongated vortices that influence the surrounding freestream flow. The turning vanes that hang from beneath the nose are split into four elements, each with their own footplate that are again divided into a total of seven individual aerofoils.
BargeBoards
A large, beautifully sculpted vane towers above the bargeboards. This also fits in the regulatory region described above – expect to see these sorts of devices break out as the season progresses.
Sidepods
As the power unit regulations mature the engineers find them easier to cool sufficiently, and so the inlets can be reduced in size and drag decreased.
Most of the cars will be around 15cm longer than last year to manage the larger front tyre wake and take advantage of the larger floor. The W08’s sidepods have certainly extended and as a result the coolers inside can also be stretched and the bodywork squeezed in for less blockage.
Together with intricate bargeboards there are equally complex flow conditioners which straddle the car. These are composed of three elements and reach forward to deflect as much wake from the sidepod undercut as possible. Their curled undersides entice clean flow towards the rear where it can be used more effectively.
These are accompanied by new wing mirrors which appear to incorporate infrared cameras to monitor tyre temperatures. The team’s partnership with Qualcomm has produced a variety of data acquisition and transferring techniques during their recent dominance and perhaps this is another development.
Whereas some of the other teams that have launched so far have taken the opportunity to narrow the frontal region of their sidepods, Mercedes has actually widened it, which is in keeping with the extra 100mm per side tolerance allowed by the new regulations.
However, whilst the sidepods have this extra girth, the sidepod’s inlet is perhaps the shallowest, allowing for an extreme undercut that tapers down the rest of the car into a very narrow coke bottle region, that is framed by an elevated cooling outlet, which begins in line with where we’d expect the engine and exhausts to sit.
In order to achieve this new-found slimness, the team has seemingly re-angled the radiators within the sidepods to facilitate the aerodynamic concept.
Floor and diffuser
Having used scallop slots ahead of the rear tyres to displace turbulence away from the diffuser in recent years it is interesting to see Mercedes move to simple perforations for 2017 (albeit as many as nine of them).
Rear wing and mini-wing
The rear wing has a bow shaped profile – it is shallower at its tips than at the centre. This gives us some indication as to how aerodynamically balanced the car is, as the team doesn’t feel the need to go chasing maximum downforce at the expense of stability.
SF70H
Ferrari tends to hide its race (and even test) specification parts at launch so any assessments of the front of the car should be taken with a pinch of salt.
At the moment the camera pods are fused with the nose with no mounting bodywork dictating the aerodynamics. Four overlapping fins – reminiscent of 2008 – sprout from the bulkhead to ease the transition of flow from the steep nose to the flat chassis top.
Bargeboards and Sidepods
The bargeboard area will be heavily exploited this year but Ferrari have kept their powder dry for the launch and testing.
The array of vanes and flow conditioners are designed to do a variety of things. The curled vane that stems from the sidepod shoulder forces the air down and along the undercut towards the back of the car. Closing off the top of the inlet is another horizontal vane that guides air into the aforementioned secondary intakes. Protruding into the front tyre wake is a huge rectangular board, shielding the undercut from turbulence. Two louvres are used to bleed off pressure built up on the inside face.
Shark Fin, Rear Wing and T-Wing
A shark fin and a T-wing – words you might not associate with F1 until now. The function of the shark fin is to ensure that airflow arrives cleanly at the lower rear-wing which now sits in a realm of dirty flow coming off the upstream bodywork.
The T-wing is a new feature for this year thanks to a small opening in the regulations as a result of the lower and slanted rear wing. It captures and kicks cleaner flow passing higher up the car upwards, enticing the flow coming off the rear-wing behind to rise. This helps the rear-wing to produce more downforce.
A monkey seat winglet has been installed on the rear crash structure but it is sat some distance from the exhaust exit. In recent years teams would use the combination of the hot exhaust gasses and a winglet to connect the diffuser and rear-wing aerostructures, generating an upwash effect. Given that the wing is lower and the diffuser now taller, a monkey seat is not as beneficiary.
RB13
Despite the overall simplicity of the new Red Bull, the front of the RB13 has had arguably the most treatment over winter than any of its main rivals.
Front Wing and Nose
There are no drastic changes to the front-wing but, unlike the rest of the grid, the upper flaps have an upturned shape inboard of the car.
The nose has drawn a lot of attention simply because nobody else has put a hole in their thumb tip extension. Lotus came up with a solution to evade the single cross section rule in 2014 and this has been copied inside the RB13’s nostril. A series of vertical aerofoil-shaped vanes are arranged in a vee and are arranged closely so that when any slice of the nose is taken, the upper part and lower parts of the channel are always connected by one of the vanes.
The hole exits immediately behind the tip and not up to the new S-duct or to the driver footwell, so it is clear that it has been designed to work the airflow passing over and around the neutral section of the front-wing.
Bargeboards and Bodywork
We all know how strong the Red Bull aero department are so whilst it was disappointing to see a lack of creativity in the bargeboard region we can be confident that something new is on its way ahead of Melbourne.
Having always put aero ahead of every other aspect of the car, the tight bodywork has many benefits – should the Renault power unit beneath be sufficiently cooled. The wider tyres and track width have had a notable impact on the car’s drag, meaning that power sensitivity is even higher from an engine perspective. To counter any potential shortfalls from Renault’s end, decreasing the car’s surface area will improve straightline speed. In addition, the exposed floor area as a result of this pinching effect can be used to power the rear diffuser, which is both taller and wider for 2017.
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Floor and Rear Details
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The larger rear diffuser continues with the edgeless outwash design with slots made into the sides to entice airflow out from beneath.
A simple but notable observation is the central exhaust placement, which now sits lower and between the two wastegate pipes. This lowers the car’s centre of gravity slightly and also opens up opportunities for a winglet to influence the exhaust plume.