2011 Force India VJM04 Mercedes

The Force India VJM04 is the first car created by the team under its new technical director Andrew Green, who exactly 20 years ago was one of the men behind the original Jordan 191.

Green and rest of the Silverstone-based team faced major challenges created by the changes in the 2011 FIA Technical Regulations, with a cut in downforce and the movable rear wing chief among them. In addition Pirelli has become the new tyre supplier, and the teams have agreed to allow the use of KERS again. The result is a car that is very different from its predecessor.

'Everything is different, but visually a lot of it is subtle,' says Green, who re-joined the team in July 2010. 'The most obvious visual change is that we've gone away from a conventional roll-hoop to a blade. This gives us a small packaging improvement compared to a more conventional style. The engine cover is different, in-line with the abolition of the F-duct system. But there are a lot of differences under the skin that people won't necessarily notice.'

The ban on double diffusers and other changes in the rules created a drastic cut in downforce at the rear of the car. Getting it back has been one of the major challenges of the winter.

'We've recovered a lot of the aerodynamic performance, we believe. We still have a little bit to go, but we are still in the process of the realignment after the end of last season, because it does take a long time to move aerodynamically from one position to another. The movable wing is a whole new game, and we'll be trying to exploit its performance to the max.

'We've also put in a lot of work trying to maximise the potential performance of the new Pirelli tyre compounds. To this end we've recruited a new senior tyre engineer, Jun Matsusaki, to guide us through the development process. The test we recently conducted in Valencia was a good learning exercise.

'Exhaust management will also be a big area of development this year. There will be an upgrade for the first race, so there are some changes that will come into effect at the Bahrain test. Further down the line there are some big updates for the front of the car coming in for the first European race.'

Significantly the team has done far more than simply address the new rules. It has also gone back to basics by taking a close look at the fundamentals of last year's package, and attempted to address key areas of concern.

'Towards the end of last season there was a drop-off in our relative performance,' says Green. 'In theory we were adding performance to the car, but it wasn't getting translated to the track. We decided to have a very close look at what was happening on the car, and what could be causing this. The bottom line is we didn't extract the most from the blown diffuser, thus over the winter we've taken a reasonable philosophy chance on the aerodynamics of the car in order to try and prevent the sort of drop-off in performance that we saw at the end of last year.'

In addition the team has focussed on improving its performance in high downforce spec.



Únderlining the team's renewed focus on aerodynamic development, there will extra emphasis on gathering data on the Fridays of race weekends.

'We are going to be using the real car at the track as a validation tool for the aerodynamics, which is something that we haven't done effectively before. There's a lot more focus on what's actually happening on the car aerodynamically. To measure it at the fidelity that we need to measure it at is a huge task.

'We understand how important it is, and we're in that game now as well. That will start to feed back into the aerodynamic development of the car. When we get positive results it backs up our development tools, and when we don't, we'll investigate why. Fridays will be a lot more about understanding the car we have as well as understanding the track at the time and the tyres you're running.'

The change requires more accurate sensors and different procedures for gathering data, better analysis tools, and dedicated people at the trackside focussing on the aerodynamic performance.

Force India is not entirely new to KERS. The 2009 car was designed to utilise the Mercedes system and the team ran it in testing, although it was never raced.

'The Mercedes KERS system looks very strong, and we're really happy with it. We've done a lot of running in the simulator, so the drivers are well up to speed with how to use it. We're well developed with what we have to do for harvesting and deployment. It's smaller and lighter than in 2009, and packaging required very few vehicle compromises.'

Summing up, Green says the intention is to build momentum over the course of the year as developments come on stream, and the aero work pays dividends.

Source - Force India

Turkish Grand Prix Report

It was a tough afternoon for Force India as Adrian and Paul battled hard but missed out on points at Istanbul Park. Adrian enjoyed exciting battles with Barrichello's Wiliams and the Sauber of Perez in the closing stages, while Paul failed to finish a Grand Prix for the first time this year after encountering some technical issues.
Adrian Sutil, P13, VJM04/04

Tyres: Soft, Soft, Hard, Soft

Source - Force India

Chinese Grand Prix Report

Temperatures

Air, minimum/ maximum: 22.0 - 23.0°C
Track, minimum/ maximum: 26.0 - 32.0°C
Humidity, minimum/ maximum: 23.5 - 30.9%

Force India Formula One Team drivers Paul Di Resta and Adrian Sutil came home in 11th and 15th positions respectively at the end the 2011 Chinese Grand Prix. Both drivers made good race starts, with Paul up one place to 7th and Adrian making up three positions to P8 by the end the first lap. Únfortunately, the usual front runners who had started lower down the grid were just too strong as the race unfolded, and the team narrowly missed out on a top 10 position for Paul, whilst an incident with Perez forced Adrian to come into the pits for an unscheduled nose change in the latter stage of the race.
Adrian Sutil (car 14)

I was unlucky with the incident with Perez, which cost me the race. But in the end we had problems as well with the tyres, they didn't last as long as we thought and I was just struggling the whole time. We have to understand why we were not so competitive in the race this time; in qualifying we were much better, so we will go away, analyse everything and I think it is good that we have the break now before the next race in Europe. The team back at the factory did a good job to get us to where we are after these first three races; we just need to work out what happened in particular today to bring both qualifying and race performances together.

Paul Di Resta (car 15)

It was always going to be quite a tough race, starting from where we were. We came very close to scoring points, but just missed out at the end when the tyres had gone. Having gone into the race without heavy fuel runs may have compromised us a bit. We didn't quite get the aero balance right at the start, but the second and third stints I think were pretty good, just a bit longer than expected because we had to stop early to try and cover Michael Schumacher. May be a three stop strategy would have suited us better, but only time will tell in the simulations. But we came here relatively strong in performance and I think we have to be very thankful of that. Overall I am still very happy on how the weekend went considering we qualified into Q3 and came close to scoring points once again.

Source - Force India