Open top menu
Showing posts with label Sauber. Show all posts
Showing posts with label Sauber. Show all posts
14 Feb 2013
#TechF1 Show - Under Nose Ducts & 'S' Ducts Explained (Sauber, Red Bull Racing & Ferrari)

In this brief video I have a look at a feature started by Sauber last season (C31) and carried across to their new design.  Red Bull have also adopted an S Duct within their design this season whilst Ferrari are using a duct underneath their nose for additional cooling and to tidy up the Boundary Layer being produced under the nose. (Boundary Layer = Formation of slowed airflow over an extended section of bodywork) By intersecting the point at which the Boundary Layer starts to form with a change in surface the slowing of airflow isn't as rapid.


Read more
9 Feb 2013
DRD – Drag Reduction Device - Passive Drag Reduction

Lotus introduced a system they simply designated 'The Device' during Free Practice sessions in 2012 as a response to the FIA continuing to allow Mercedes the use of their DDRS (Double Drag Reduction System).

The mainstream media I believe have caused confusion amongst fans as they continue to call the Lotus style system DDRS when the systems are very different. The term DDRS should be used when the DRS mechanism is used for a secondary purpose just as Mercedes and Red Bull did in 2012 when stalling the Front Wing and Beam Wing on their cars respectively. This secondary function of DRS was utilised by these two teams by means of holes placed in the Rear Wing being exposed when DRS was deployed moving airflow to other regions of the car.

DRD however is a passive system and requires no interaction from another system or the driver to reduce drag at the rear of the car. As Lotus were the first team to utilise the device I will use theirs as my example.

DRD is made up of several additional components with different teams having tried different configurations along the way in order to both assess it's capabilities and fit within their own aero configuration. In the case of Lotus we have 5 main parts:


1. Airbox Ear's - Starting at the Front these little ducts move air down the internal tubing (2) toward the periscope.

2. Internal Ducting - The airbox and ears have separate outlets (Seen in the image below) with the top one most likely the pipe from the Airbox Ear's that feeds to the periscope and the lower regulating the release of airflow from the engine as usual. 


3. Engine Cover Exhaust: Usually the engine cover stops much more abruptly at the rear of the car that when the 'device' is fitted. The additional exhaust section serves a few purposes: It allows the addition of the periscope that extends upto the rear wing but also acts as an exhaust for the airflow which exits into the beam wing Monkey Seat / Mini Diffuser.

4. Periscope: This is most important aspect of the whole system as it's how the air is transported to the underside of the Rear Wing in order to create the additional downforce at low speed and 'Stall' the rear wing over the speed threshold. In the picture below Lotus had the ejector holes taped over in order to stop the device operating (due to bad weather conditions) 

5. Monkey Seat / Mini Diffuser is placed / being used in order to take advantage of the situation presented by the device in general. By adding this Diffuser shaped Monkey Seat the airflow will be pulled through the exhaust as Downforce is generated on top.

So now we understand the sum of the devices parts lets look at how it works and how much of a benefit it could offer.

Air travels through the airbox ears out through the engine cover to the engine cover exhaust (depicted in blue), at a pre-determined speed threshold (measured by the team) the exit of the cover exhaust cannot extract the airflow it's being presented with. This allows the air to move up the Periscope and is ejected from the narrow slits placed on the sides of the periscope. The orientation of the slits means the airflow blows tangentially across the mainplane disrupting the regular airflow pattern sending the wing into a stall.  (In order to adjust the speed threshold at which the device stalls the rear wing you must adjust the size of the outlet)

The problem the teams have faced whilst testing DRD is the ever changing conditions (climate) and car changes ie ride height etc. Furthermore this season will represent a different challenge for the devices as unlimited DRS usage is now unavailable for qualifying. This puts the onus on all the teams to use DRD and reduce the drag wherever possible but the time required to calibrate the device for it's passive switch eats into valuable setup time elsewhere on the cars setup.

The speed differential created by reducing drag via DRD will of course differ for the given application and as we have seen throughout 2012 and 2013's Testing different approaches have ensued. The other way to look at is how much downforce are you willing to give up? Teams with more downforce to trade off could start their stall earlier resulting in a higher top speed. So in summary although the innovation behind DRD is fantastic to see, it's adoption due it's passive nature remains to be seen. In terms of gains I'd speculate based on the gains seen by teams using the F Duct that a speed boost upwards of 5/8KMH could be seen on the straights.

DRD is perfectly legal as it requires no moving parts or interaction from the driver, it's activation is passive and relys on fluidic switching. The periscope lies within the central 15cm of the rear wing making it dimensionally legal and so unless the FIA deem the usage to be un-safe I don't see this being banned for 2013. In order to prohibit it's use the FIA would need to amend:

3.9.2 - No bodywork situated between 50mm forward of the rear wheel centre line and 150mm behind the rear wheel centre line, and which is between 75mm and 355mm from the car centre line, may be located between 400mm and 730mm above the reference plane.

Here's what we have seen in terms of DRD thus far:

Above: Lotus' application of blue flo-viz here helps us see the effects of DRD, the V formation on the mainplane indicates that the airflow in this region has separated causing the wing to stall allowing for a higher top speed.

Above: Mercedes version trialled from Spa onwards in 2012 featured a periscope that fell short of the underside of the rear wing.  This would increase the distance at which the periscope could blow over the mainplane but would reduce it's targeting effect.


Above: Red Bull took the opportunity to test their iteration of DRD at the Young Drivers test in Abu Dhabi

Above: Although this isn't DRD it seems Toro Rosso were evaluating running a centralised device when they tested at Abu Dhabi.  Their appendage however featured two periscopes rather than one which could enable even more drag reduction.

Above: Last day of testing at Jerez (2013) and both Lotus and Mercedes placed their DRD's on the car to test but as we can see both have switched their design format effectively trying out each others designs.

As an aside we all know I don't have CFD in order to ascertain the credibility of my theories however as I have put forward in the past a way overcoming the switching effect required for DRD to work may be to introduce another flow construction enabling DRD's speed threshold to be lowered. To do this I'd look at the plausibilty of running DRD in conjunction with a mainplane hole like we have seen many teams utilise in the past. This may make tuning DRD easier as you now have another way of regulating the airflow in the central portion of the mainplane.


Lastly DRD has thus far been seen to be targeted at the Rear Wings Mainplane in order to reduce drag but just as Red Bull did from Singapore onwards with the use of DDRS I see no real reason why the Beam Wing couldn't be stalled through the use of DRD instead or aswell as.  I look forward to seeing if/what teams decide to implement in regard to DRD throughout the 2013 season.

If you prefer to listen to what I'm explaining in this post then I have also compiled the information in the following video:


Read more
6 Nov 2012
Abu Dhabi Young Drivers Test – Day 1

Whilst some of the teams elected to carry out their Young Drivers Tests earlier in the season we have Red Bull, McLaren, Lotus, Sauber, Toro Rosso & Caterham all taking part in a 3 day test after the Abu Dhabi GP.

Although the Test carries the 'Young Drivers' title teams can use their experienced testers behind the wheel as long as they haven't competed in a GP weekend. This is why we find Gary Paffett (31) and Nicolas Prost (31) behind the wheel of the McLaren and Lotus respectively. These drivers are used due to their technical nous and relative time spent in the simulator. Meanwhile Red Bull, Sauber, Toro Rosso & Caterham (latterly followed by McLaren with Magnussen) are happy to try out the new breed of drivers.

The test days provide not only the opportunity to assess future talent but also offers the teams time to look at setups and aerodynamic components that may not be able to be covered in the usual Free Practice programme.

In Sauber's assault towards Mercedes for fourth in the constructors it's been important that the team score regular points and so less risk is taken in testing new components throughout their Free Practice time. The team decided to debut their own version of a DRD (Drag Reduction Device) with Frijns on the first day of testing in Abu Dhabi to assess the devices potential for integration into their 2013 challenger.


The Device bears more resemblance to the Mercedes counterpart (of which Mercedes have continued to test during FP1 at the last few GP, the team are however coy on it's usage, stating that it's unlikely it will feature in the W04's design)
Unlike the Mercedes & Lotus DRD's Sauber haven't added inlets around the roll hoop but instead it would seem two periscope ducts have appeared on top on the bulkhead. (Credit @F1Talks) It seems Sauber may be using these 2 ducts to feed the airflow channel encased within the Engine Cover that leads to the Periscope.

Like Mercedes we can see that Sauber's version doesn't meet with the underside of the Mainplane most likely to distribute the airflow it creates over a larger surface area. As I discuss in my DRD article the Mercedes and now Sauber devices are more likely keyed to produce more downforce from the Rear Wing by making the Mainplane more efficient at higher AoA's (Angle of Attack)


Red Bull have the impressive Antonio Felix Da Costa behind the wheel of the RB8 for the first 2 days of the test. Da Costa, I believe could be the next big name to break through as part of the Red Bull young driver programme and think it could happen as early as late next season if either of the Toro Rosso drivers fail to impress. The young Portuguese driver who has showed his talents in both GP3 and WSR this season completed the most laps on day 1 racking up 79 laps in the RB8. His fastest lap was merely 0.066 from the fastest lap of the day recorded by Magnussen in the MP4-27 but as we can see from the pictures below the team were using a Pitot Tube Test Device on the car for some of his running.


Luiz Razia is no stranger to Young Driver's tests having done the same for Virgin Racing in 2010 and Team Lotus in 2011. He was also signed as a test driver for Team Lotus during 2011 whilst continuing to compete in GP2. With his 2nd place finish in the GP2 Series for 2012 the young Brazilian is looking for a place in an F1 team for 2013. With Toro Rosso having already named their lineup for 2013 the opportunity to drive their car simply puts him on the radar for other teams with the driver completing 67 laps.  The Toro Rosso did feature their HUGE 'Monkey' Seat which I'm now going to start calling a 'Gorilla' Seat (below)


Giedo Van Der Garde piloted the CT-01 on Day 1 with the team continuing to evaluate parts taken to Abu Dhabi but seemingly didn't work as planned.  In the pic below we can see the team using a test rig in front of the Sidepod to evaluate the airflow.

McLaren ran 2 driver's in their day 1 lineup both of which have already been mentioned, unlike some of the other teams it would appear that McLaren were simply looking to establish track time on day 1 with both Paffett and Magnussen covering 84 laps combined. They did however use their diffuser test rig during some of that test phase along with their Front Nose/Wing test rig.


Lotus also used a test rig that attached above the diffuser in the gap between the Wheel & Rear Wing Endplates to assess their new 'Coanda' Style exhaust.
Read more
16 Sept 2012
no image

Eddie Jordan threw Silly Season into full swing by announcing he was privy to information relating to Lewis Hamilton making a move to Mercedes. However this rumour alone has not the only impacted Lewis Hamilton, McLaren & Mercedes but it will form the lynch pin in the whole driver market.

Red Bull shrewdly moved earlier in the season to resign Mark Webber for another season and with Sebastian Vettel already on board until the end of 2014 the team can concentrate on racing rather than PR.

Ferrari have Fernando Alonso signed until 2016 further showing his status as number one driver within the team. Meanwhile Felipe Massa's seat with Ferrari has been in doubt all season, a recent climb in form may be enough to warrant his seat for 2013 whilst Sergio Perez spends another season with Sauber. Felipe struggled to come to terms with the F2012 and Pirelli tyres at the start of the season and marked Monaco as a turning point in the season claiming that he finally understood the setup required. It could be no coincidence that Felipe's struggles could be down to Ferrari's decision to run with Front Pull Rod Suspension, with Fernando Alonso being the last driver to utilise it to his advantage in his maiden year at Minardi.

McLaren are obviously at the centre of a battle between themselves and Mercedes over procuring Lewis Hamilton's services for 2013 and beyond. Lewis signed a lucrative deal with McLaren just before the economic downturn and it's understood that McLaren are no longer in a position to fund the same or better deal. Further adding to his requirements are his image rights and the relinquishing of any trophies the driver may win. McLaren have a history of insisting on their drivers being intrinsically linked to the sponsors that McLaren have onboard these image rights alone can be worth many millions if carefully managed and so XIX Entertainment will be fighting to release these from any further contracts Lewis should sign.
Jenson Button meanwhile has already been in this position last year and easily manoeuvred his negotiations whilst also being put in the frame for Red Bull & Ferrari seats. Although the team always give the impression that they favour neither driver it could be argued over the last 2 seasons their development path has been more favourable to Jenson. Could this also be a catalyst in Lewis' thoughts about a switch to Mercedes?
I've previously written about the relationship between McLaren and Mercedes which leaves us wondering are the two working on a deal that sees both parties win in the battle for Lewis' signature? http://somersf1.blogspot.co.uk/2012/09/could-lewis-merry-go-round-be-engine.html
Much has already been talked about the use of Mercedes global platform to catapult Lewis' image to a larger audience but I personally feel that if the negotiations are actually taking place he needs to decide if he is a racer or a celebrity.

Mercedes have Nico Rosberg signed for 2013 and beyond but with them courting both Michael Schumacher for a contract extension and Lewis Hamilton to sign on for the team could he be forced to leave the team? Using Rosberg as leverage in a multi faceted driver and engine deal / compromise could see the young German line up alongside Jenson Button for McLaren. Rosberg's driving style is not dissimilar to Jenson's and so could allow McLaren to focus their design process behind the MP4-28 solely on their more conservative attributes.
Ross Brawn has already alluded to the fact that their 2013 challenger (WO4) will be an evolution of the WO3 but has instructed the team to 'try out' things toward the end of the season in order to have a better chance throughout 2013. (They did exactly this at Spa with the own DRD http://somersf1.blogspot.co.uk/2012/09/lotus-mercedes-drd-drag-reduction.html – and took a McLaren Style exhaust, DRD and other bodywork to the Young Drivers Test this week in Magny Cours - http://somersf1.blogspot.co.uk/2012/09/mercedes-wo3-updates-at-young-drivers.html )
The teams DDRS system although innovative has failed to make a huge dent in a season that has seen the teams closer than ever. Meanwhile they have been lacklustre in terms of developing the WO3 and now with only 9 races left of the season although mathematically still able to contest the Championships really find themselves battling for 4th place alongside Lotus and Sauber.
Michael Schumacher's impact since his return to F1 in 2010 has been low key, however this year has shown that the old dog still has some fight left in him. Schumacher's best chance of further glory lies in the regulation changes of 2014 at which point he will be 45. So can the German convince the board in Stuttgart he can still bring them success or is this why they are moving for Hamilton? I fear without Hamilton's signature either in place of Nico or Michael the German Marque may decide to cut their losses with their own team and re-focus their F1 aims at just being an engine manufacturer.

Lotus in my opinion made a shrewd move when signing Kimi Raikonnen although he had been out of the game for 2 years Kimi had remained competitive in 4 wheel sport. The Finn brings a certain character style that neither McLaren or Ferrari truly harnessed. Kimi's goals are not driven by the celebrity limelight that some require but instead lets his racing do the talking. He is signed with the team for 2013 that may be forced to rename as their sponsorship deal with Group Lotus expires at the end of the season. I have seen Kimi mentioned by McLaren fans as someone to return to the team should Lewis move but personally I cannot see that happening.
Romain Grosjean is undoubtedly a talent having succeeded at varying levels of open wheel racing however his F1 career is always under somewhat of a cloud. Whether it's his first attempt at F1 with the Renault team after Nelson Piquet Jnr was dismissed or his current drive with Lotus. Boullier however is sticking by Romain and although his contract expires at the end of the season I expect he'll remain with the team for 2013.

Sauber are a team on the up, typically Swiss they always seem to be the most neutral of all the F1 teams. However behind close doors they work away on relationships that allow them to keep a foothold in the sport. The use of Sergio Perez who is part of the Ferrari Academy allows the team to create a partnership with Ferrari who also supply their engines, KERS and drivetrain. Notably Checo has been able to use the Pirelli tyres to his advantage throughout 2012 bringing him to the attention of some of the top teams. As part of the Ferrari Academy Checo will undoubtedly have his career manipulated by the Ferrari team whilst Checo joins a long line of drivers drawn into the Hamilton to Mercedes battle as the Daily Mail today infer that McLaren are interested in the Mexican. Meanwhile Ferrari president Luca di Montezemolo has said that Checo is not yet ready to join Ferrari and so the temptation of a top seat with McLaren could test his mettle if offered a contract. The largest stumbling block I forsee in a move for Checo to McLaren are his ties to Telmex. Although Telmex are largely a South American concern any deals he currently has with the brand would eliminate him McLaren's radars due to their own involvement with Vodafone. As we can see from the C31 the Mexican's sponsorship is displayed on virtually every corner of the car (Telmex, Claro, Visit Mexico) with the Billionaire Russian Abromovich fronting the rest with his Chelsea logo's.
For a team like Sauber that relies heavily on funding from outside sources Checo must remain a driver for the team to continue in F1.
Kamui Kobayshi is a driver that will have warmed most people's hearts when he burst onto the scene with Toyota at Interlagos in 2009. He famously took on Jenson Button who needed to finish well at Interlagos to secure the 2009 Championship. Although Kamui has scored more points already this season than that of 2011, he has been overshadowed by Checo and I'd imagine like many others is struggling with the Pirelli rubber. Kamui is a solid driver and I see no reason for him to be replaced unless the cash strapped Sauber outfit do indeed lose Checo and need to balance the books with 2 sponsored drivers rather than one.

Williams acquired the services of the Venezulean driver Pastor Maldonado for 2011 and retained his services for 2012. I was recently at Williams for the FOTA forum where Sir Frank Williams lauded his driver for his dedication and skill set. I see no reason why Williams would want to replace Pastor as he brings plenty of money to the team and previously had success in GP2 with the Rapax Team.
Bruno Senna joined Williams having previously had arduous seasons behind the wheel of the HRT (2010) and replaced Nick Heidfeld for the end of the 2011 season for Renault. The Brazilian brings his own array of sponsors to the table for Williams and although going almost unsung hasn't had a dissimilar season to Pastor. Rumours are abound that he will be replaced for next season, however unless a driver of much higher talent or one that can bring much more money were to be available I see no reason for him to depart.

Force India have both of their drivers contracted for the 2013 season but have already stated they won't stand in the way of either making moves to higher teams. Both Di Resta and Hulkenberg have been linked with Felipe Massa's Ferrari seat and as possible replacements should Michael Schumacher decide to retire once more. Di Resta has more recently been linked as a replacement for Lewis Hamilton at McLaren should the latter make a switch to Mercedes. This may be fuelled by Di Resta's new management who also looks after Jenson Button.

Toro Rosso have already proven that their driver programme comes first when they ejected both Sebastian Buemi and Jaime Alguesuari from the 2012 plans. The Red Bull brand use the Toro Rosso team as a platform to find new talent for their senior team with Sebastian Vettel being the benchmark. Daniel Ricciardo jumped the queue during 2011 by being place with HRT in order to access his abilities in advance. With neither Ricciardo or Vergne showing the type of pace that Vettel did in his Toro Rosso days it will be a surprise to no-one if the team start with a fresh line up next season. This will leave the current drivers looking for drives in 2013.

Caterham have had the services of Heikki Kovaleinen throughout their various guises over the last 3 years. It does however seem that Heikki is done with his share of trying to help the team elevate through the grid and rumours have linked him to both Sauber and the seat potentially being vacated by Lewis Hamilton. Heikki has already been part of the McLaren team once in his career and so McLaren and/or himself may be reluctant to revisit the partnership. Vitaly Petrov found his way to a Caterham seat after a lacklustre performance for the Renault team. I've heard rumour that some of his sponsors are becoming disillusioned by his and Caterham's performances and may withdraw their support at the end of the year. I personally never understood why the Russian didn't find his way to a Marussia seat in the first place but he looks destined for there should the rumours hold firm.

Marussia may well be a further force throughout 2013 with their technical partnership with McLaren bearing fruit. The team have also announced they will run KERS for the first time during 2013 which will give them a much needed boost in order to chase the teams in front. Timo Glock is the lynch pin in the Marussia team and is signed on a multi year contract, however Charles Pic is rumoured to be unhappy and reports have him linked to Caterham, Force India and Sauber for 2013 drives.  Marussia could well place Max Chilton in the second seat in place of Pic (Thanks to @MarussiaF1Will for his fan perspective)

HRT the team if they are wanting to progress surely need to recruit some young talent in order to inject both life and money into the team. However De La Rosa's Spanish connection and years of technical experience inside McLaren may well see him keep his seat.  Both Dani Clos and Ma Qing Hua have connections with the HRT team and could see their way to at least one of the seats.  Meanwhile Antonio Liuzzi still has some connections to the team and could take up one of the seats again. (Thanks to @Lundo888 for an insight who is a HRT fan)

On the fringes – There are plenty of drivers out there that still either warrant a seat or warrant a shot at one but the most likely candidates would be:

Adrian Sutil – Was dispatched by the Force India team but has been touted to be talking to quite a few teams including Ferrari and a return to Force India
Jaime Alguesuari – Toro Rosso driver for 09-11 and currently keeping himself busy with the Pirelli test drivers role.
Lucas Di Grassi – Ex Virgin Racing driver and the previous Pirelli driver has now aligned himself with a test role with FormulaE (See my article on Formula E here - http://somersf1.blogspot.co.uk/2012/09/formula-e-future-of-motorsport.html )
Karun Chandhok – Ex HRT and test driver for Team Lotus in 11 Karun never really had the opportunity to show the talent he may have.
Jerome D'Ambrosio – Currently a reserve driver at Lotus and drove at Monza in place of the banned Grosjean
Sebastien Buemi – Currently a reserve driver for Red Bull Racing
Rubens Barrichello – Still wants a seat in F1 and could prove an asset to one of the younger teams.
The list of drivers that could/should step up from Feeder series like GP2/3 is huge but as Will Buxton mentioned in his recent article (http://willthef1journo.wordpress.com/2012/09/05/poisoning-the-well-f1s-underlying-problem/ ) the problem with this no longer just lies in the expectations of quality.

Lewis Hamilton holds the key to a driver market that will unravel when he puts pen to paper and why shouldn't he hold all the cards? Afterall he is a once in a generation driver who transcended the need to start his F1 career at a lower tier team and won a title in his second year (He should really have clinched the title in his maiden year too, although we'll let him have that one) 
You have to wonder if his desire to win races and titles can be matched by the Mercedes team. Their only win in 3 years came at a time when almost any team from 7/8 could have won a race as they all battled over understanding the Pirelli tyres. 
Lewis' decision needs to be one made from the heart of a racer and not one from the brain of a branding house.
Read more
14 Jul 2012
Off Throttle Exhaust Blowing in 2012

The use of Off Throttle exhaust blowing is not something the teams will simply forget about, with anything in life once learnt you can't simply unlearn it.  Some of the teams are pushing the limits of what is able to be achieved with this years rules in regards to off throttle mapping.

During 2011 the teams were using aggressive off throttle maps in order to get a continued exhaust gas flow whilst the driver was off throttle using 'Hot Blowing'.  Put simply when the driver lifted off the accelerator pedal the ECU continued to supply a small injection of fuel but cut the ignition, the net result is that the fuel still combusts due to residual heat but doesn't provide the same force it would if ignited.  This results in an increased exhaust gas speed, effectively allowing a transition period whereby the driver isn't robbed of the rear downforce that the exhaust gases generate when the throttle is applied.
It is also possible to 'Cold Blow' which is essentially a leaning out process wherby you introduce less fuel to air ratio up until the point whereby you're 'Off Throttle' where the exhaust valves are still open, pumping nearly all of the air from the cylinders.

For 2012 the FIA altered the rules to try and restrict the teams using off throttle blowing to aerodynamically influence their cars.  Firstly by restricting the exhaust outlets to vent to atmosphere atop of the bodywork rather than placed inside the bodywork above the floor.  Secondly they amended the regulations in regard to engine mapping, torque deliverance, clutch position/usage etc.  Although the FIA would love nothing more than to have Off Throttle mapping totally outlawed the engine manufacturers requested that a certain element remained in order to safeguard the engines.  This obviously leaves room for the teams to pick holes in the regulations in order to further extract aerodynamic advantage from off throttle blowing, be it Hot or Cold Blowing to create downforce.

It is clear that the effect has been dramatically reduced from 2011 where the cars sounded distinctly different to how they do now under deceleration / cornering. (See the video below)



However I think what it is important to realise is that the Off Throttle blowing is still happening even if it's effect is dampened.  It's usage this season is not as aggressive as before but it still allows a transition period for the downforce to dissipate from the car rather than it suddenly be robbed.  It's also important to realise that it's not just one team that is using this as an advantage but some clearly push the boundaries further than others.

Melbourne 2012 and the teams were using Off Throttle Blowing but the sound is much more attenuated meaning the effect has been quelled.  However some teams definitely still have a more audible off throttle blowing sound.  In the video below (Thanks MrJokerman001) we can hear many occasions where both Red Bull and Sauber have a more distinct over run note (Start with Red Bull at around 0.11 and compare the deceleration to that of the Ferrari following.  At 1.06 the person shooting moves to another section of the track and you can hear the difference between the Red Bull, Sauber and Williams over the next few minutes)




At Barcelona this time we can hear below that McLaren are utilising off throttle at around 0.22 in comparison to the cars that proceeded it.



Valencia: A video I have posted in the past showing the Red Bull use of off throttle in low speed corners



As the ability to control off throttle usage filters down through the teams we will see all of the teams pushing the limits imposed upon them to gain an aerodynamic advantage.  As we can see in the video below from Silverstone (Thanks fraserjhamilton) Caterham were using off throttle blowing to assist.



Red Bull are now also using a Resonator / Expansion chamber in their exhaust which will not only add the benefits mentioned in my previous blog post: http://somersf1.blogspot.co.uk/2012/07/red-bull-exhaust-resonator-expansion.html it will attenuate the off throttle sound produced.

I have also previously talked about my theory of using Cylinder Deactivation in order to produce a more successful off throttle application, perhaps my intent behind talking about that subject wasn't clear enough but I'll try to briefly touch on this subject again now. (Having previously talked about cold blowing earlier in the post)

The advantage of Cold Blowing, Cylinder Deactivation & the Exhaust Resonator / Expansion Chamber would be that you would have a more tractable car.  Lets look at the engine cycle to further explain my thoughts but we'll do it from the premise of a 4 cylinder engine to allow for an easier explanation.
Lets imagine that we are deactivating cylinder 1 & 3 that means you would normally have the inlet and exhaust valves closed and no ignition fuel sent to those cylinders during the piston stroke. However in order to cold blow lets imagine we continue to open the exhaust valve after the normal power stroke, the gas usually stored for the next cycle will be dispensed and cold blow.  If this effect could be switched between cylinder banks after each cycle you would have cylinders 1&3 producing cold blow whilst 2&4 would produce the regular power cycle after this cycle is complete switch to 1&3 in the power cycle and 2&4 cold blowing.  The largest advantage Red Bull would currently have here is the stored gas in the resonator / expansion chamber helps create a pressure drop in the cylinder sufficient enough to draw more air into the cylinder than would normally be the case when the inlet valve opens.

The teams are always intent on taking advantage of loopholes within the rules but in their quest for more off throttle effect perhaps we may see more cases of influence from other sectors to amplify it's effect.

(I have used amateur footage during this post as the footage available via the Broadcasters is always covered by commentary and onboard footage doesn't allow the sound to come across as well)
Read more
31 May 2012
Sauber Cut an F1 car in half

Thought I'd write a short piece about the video that Sauber released yesterday.  A great idea by Sauber that apparently took two years to complete.  The car in question is a BMW Sauber F1.08 so a few years old, however it goes a long way to show the core elements and packaging involved in creating an F1 car.  You can see how tightly packaged the components are with the voids left only for crash/impact protection reasons. As its an 08 car there are no KERS components on the car and refueling was still around in 08 so the fuel tank will be slightly smaller in size than it's modern counterpart.  I'm hoping the team may release so high res images so I can explain aspects of the car more closely.  The 08 season was at the end of a regulation run as you can tell by all of the additional aero elements on the car.  Anyway enough from me, here's the video below:


Read more

Total Pageviews