Tag Archives: tech

Analysis: 2018 Halo and its performance implications

Right, hello everyone. You may have noticed a few other posts pop up on here lately but this one is by me again. I, like many of you, was not happy at all when the FIA announced that F1 would be adopting the Halo cockpit protection device from 2018 onwards but no doubt I’ll continue watching next year…

I’ve come to accept that the sport continually shoots itself in the foot and decided to do an assessment of how the Halo will impact the cars both visually and from a performance standpoint.

Now, there are a few things you might have missed about the implementation of the device due to the red mist descending. Firstly, the teams can paint the flip flop in whatever colour they like and secondly, and most importantly, they are allowed to wrap it in a 30 mm fairing to tidy up the air around it. Considering that the Halo is in the firing line of freestream flow around the airbox, the structure mostly hinders the intake of clean air, cooling and flow to the rear wing. Other side effects include at least 20 kg extra weight (yes, F1 is getting fatter still) and possibly some disturbances to the air over the sidepod.

The Halo’s basic design will be refined by the FIA between now and the start of 2018. In testing teams have pinned it to the tub in different ways, some slightly better looking than others. Whether every team will have to fix it in the same position remains unknown. The small fairing does however present some opportunities to shape airflow in a more desirable way, although they won’t want too bulk up the tubing much more to reduce blockage and thus decrease drag.

2018 side & plan (halo)

It is for this reason that we could see a minimal approach to the fairing. The tubing’s downward slopes induce some lift, but this could be mitigated slightly by the additional bodywork. Note the higher and wider position of the airbox, similar to that of this year’s Renault, to clear it from disrupted air. I must admit that from the side and plan views of the car it doesn’t look too bad, but when viewed from the front it just looks horrendous.

Halo review

Another possible design for the fairing is to use the sides of the structure as a downwash device over the top of the sidepod, with the two rearward fixings splayed outwards and the bodywork twisted in a similar fashion. Vortexes could roll up along the sides and direct flow towards the top of the diffuser. Again, this depends on where the FIA permit the mounting of the device on the chassis.

While the Halo is in a fairly neutral place from a mechanical perspective (its mass is at the centre of the car, albeit quite high up), it’s in a frustrating position from an aero point of view. The teams and helmet companies have worked extensively on tidying up the air around the headrest in recent years and now they’ll have a new, more complex challenge. I’m not sure how aggressive the teams will get with the fairing’s design – or whether there are any additional regulations surrounding it that further limit their scope – but I can’t see any crazy solutions emerging because it’s in a place where they don’t really want to manipulate the air. Perhaps I’m wrong and some bright spark has already come up with something much better. I hope I am.

Tech Highlights: 2017 in illustrations (so far)

Procrastinating a little bit from revision by sharing some of the illustrations that I’ve done over the season so far. You can find the associated articles on Motorsport Week that explain the effects of these developments in detail.

RS17 RW

The teams had barely hit the track when Renault were called out over their rear wing support design (inset). The design was edited in a cheekily manner, dodging the regulations that stipulate that the DRS actuator must be isolated by slimming the support.

MCL32 FW_Aus_highlight

McLaren’s pace in the final sector in Barcelona shows that their chassis is reasonable, certainly above the other midfield runners but not quite there with the top dogs. The team’s aero department are constantly churning out alterations to the car – the front wing is tweaked almost every race weekend.

FW40_FW_China

The FW40 isn’t a striking car in design terms but the chassis clearly works cohesively on both aerodynamic and mechanical fronts. The above front wing was altered twice within the same amount of weeks between Australia and China.  

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Ferrari’s development rate has been refreshing in 2017. In Bahrain the Scuderia introduced their front wing proper for the season (left), featuring six elements cutting the entire span and a more pronounced vortex tunnel.

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Pretty in pink: It doesn’t matter what colour the Force India is in, the team continue to punch well above their weight despite the regulation changes. The design office is creative and not afraid to produce complex geometries such as their bargeboards and splitter above.

w08RW_spain

Mercedes unleashed an extensive aerodynamic overhaul to the W08 in Barcelona. The nose, bargeboards and engine cover were heavily revised while the spoon-shaped rear wing was ousted for a conventional design. A monkey seat winglet straddles the rear crash structure to draw the exhaust plume upwards.

RB13_bargeboard

Red Bull’s ‘struggles’ has pushed Adrian Newey back into action, although it would be unfair to say that they got the car wrong. The RB13’s clean design leans more towards drag reduction than outright downforce and the car is often up top of the speed trap charts. More complex bargeboards arrived in Spain – is this the start of their come back?

Tech Highlights: McLaren-Honda front wing and powertrain problems

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If you haven’t already caught some of my tech analysis in the past couple of Motorsport Monday magazines then here’s your first glimpse of some: I dissect McLaren’s new front wing (only on Alonso’s car) and also explain what is going wrong (again) with the MCL32 powertrain – it’s not all Honda’s fault! You can also find some mini-articles on developments from Australia on the Motorsport Week website.

Also, a quick question I would really appreciate some responses to: Would anyone be interested in buying a print of one of my many illustrations? Obviously we don’t all want a framed McLaren front wing but something more like the Mercedes W05 below might take your fancy.

Mercedes W05 review

Leave a comment on your thoughts, please! 🙂

2017 Car Launch Analysis

Haven’t managed to do all of the cars this year but I’ve covered five of the ten for Motorsport Week. Here are the links:

  • Mercedes W08 – Huge wheelbase and complex bodywork, but is it a winner?
  • Red Bull RB13 – Don’t let the outward simplicity of this car fool you…
  • Ferrari SF70H – Find out about those crazy sidepods!
  • McLaren MCL32 – Can McLaren emerge from the midfield in 2017?
  • Renault R.S.17 – Detailed from the get-go, watch out for Renault this season

 

2017 Barcelona test (1) tech review

I don’t normally cover testing anymore but a big thank you to Charlie Stephenson (@myboringhandle) for letting me use some excellent photos he took from Barcelona last week. This short blog post will cover some general tech themes to look out for in 2017 and who I think is the fastest after the first test.

Shark fins and T-wings

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Love them or hate them, shark fins are (probably (depending on what Ross Brawn has to say in the near future)) here to stay this season. The lower and wider rear wings are in the firing line of  the turbulent wake coming off the front tyres and front wing, so a fin is used to manage the air over the rear of the car. They are particularly useful in yaw situations as the car’s wheels are turning and the wake is blocked from washing over the rear wing by the large bodywork.

Mercedes have taken things a step further by integrating a chimney into their fin – a small opening has been made into the top to cool the internals. Whilst the internal aero won’t so much be pushing hot air through it, the freestream flow above the car will pull out the higher pressure air inside the car.

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Then there’s the addition of T-wings. Funnily enough, this area of the car has been opened up completely by accident. Up until October there was no bounding box to allow for such devices but in the final release of the regulations somebody made a boo-boo and, of course, the teams have exploited it. T-wings are tiny winglets that help tidy up airflow ahead of the rear wing, kicking air upwards to help the aerostructures at the rear of the car. Williams (above image) have even put two devices on the car whilst Mercedes (below) have doubled them up to induce a greater effect.

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The Mercedes version bends over at the wing tips to prevent vortices forming, although some teams may actually prefer an open ended solution. Standalone devices such as on the Mercedes look ridiculous in my opinion but I’m not overly fussed if they sprout from the fin. This area of the car could be festooned with winglets and vanes by mid-season if the situation isn’t nipped in the bud soon.

 

Testing methods

We haven’t seen anything too outlandish in terms of sensors so far but the usual methods of checking whether on-track data aligns with that seen in the factory were very much evident at the first test.

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The larger front tyres have resulted in complex bargeboards and turning vanes to shield the sidepods and floor from turbulence. Large pitot tube arrays are mounted behind the tyre to assess the pressure and velocity of the wake and how it changes in cornering situations. This data can then be used to develop new aero devices around the cockpit, or adjusted to suit a new front wing design.

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Flow-visualisation paint (or flo-viz) is a paraffin based liquid that is used to map airflow over the car’s surface. This is particularly useful for getting a baseline understanding of how the air is being influenced by the car’s bodywork on track, which can be compared to flo-viz tests in the wind tunnel and stream traces in CFD simulations. It can also identify areas of flow separation.

The Force India above is absolutely plastered with the stuff. Use of the same colour can be quite revealing to prying eyes, especially in large quantities. Teams can also use various colour combinations of flo-viz to check for cross flow from different parts of the car.

Rake angle

Rake angle is the car’s front down, bottom up attitude relative to the track surface, and increasing this angle has huge benefits. Getting the splitter at the front of the car closer to the floor induces high speed flow along the floor, while a higher rear end essentially creates a larger diffuser for air to expand from. This combination produces a lot more downforce without a huge drag penalty – even a few millimeters of additional rake brings incredible performance gains.

OK, so why aren’t all the teams jacking up the rear ride height? Well, as rake angle goes up, the sides of the floor move away from the ground, which reduces ground effect as low pressure leaks from the underfloor. To increase rake angle you must also seal the floor using complex aerostructures that stem from the front wing. We often talk about the Y250 vortex for a reason: a stable vortex that can span a great distance along the car will improve the seal. The larger 2017 bargeboards and turning vanes will also help prevent high velocity flow escaping.

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Red Bull have long been the kings of using rake as their underlying aerodynamic concept. The relative simplicity of the RB13 compared to the Mercedes and the Ferrari should not be a sign of the team’s lack of creativity around the new regulations, as getting the car to sit the way it does in the above image takes a lot of work. Less complex bodywork will also decrease drag, an area that Red Bull have been working hard on in recent years.

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Although not quite as extreme as Red Bull, Ferrari are one of a number of teams that have also pursued extra rake to find more downforce. As you can see above, there is ever-increasing daylight between the car and the track the further rearward you look.

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McLaren stole Peter Prodromou from Red Bull in 2014 and his influence on the design of the car has become clearer over the past two seasons. Prodromou was Adrian Newey’s right hand man at Red Bull during their prime and his presence in Woking has definitely been felt judging by the MCL32 chassis design. Beautiful front wings, high rake angle and a degree of simplicity are all Red Bull trademarks finding their way onto the Woking cars. It’s a pity that Honda appear to be bloody useless again this year, but let’s wait and see on that…

So, who’s fastest at the moment?

Mercedes. Yes, they grabbed the headline time on Ultra-softs but their impressive long run pace and awesome reliability show just how mighty this team really are. I must admit that Ferrari have also looked pretty good so far and I’ve been impressed by Renault. Perhaps I’ll have a review of things next week to form a full pecking order before Melbourne. God, I’m excited!

Tech Highlights: Mercedes/Red Bull ‘energy recovery’ suspension

If you haven’t heard already, F1 is set to ban the hydraulic heave springs that many teams (notably Mercedes) have been playing with over the past 12-15 months. Although it is not an official ban as yet, a technical directive has been issued to the teams addressing the claims that Ferrari raised in a recent letter to the FIA. Ferrari claims that the component can be classed under the ‘moveable aerodynamics’ catch-all phrase in the regulations, and although it has been discussed in great length over the year it is only now that the Scuderia have chosen to make a formal move against the competition. In this blog post we will aim to cover what the hydraulic heave element does and why a ban at this stage of the 2017 developments could have an impact on the pecking order. Continue reading