Q+A with Pascal Vasselon, Senior General Manager Chassis
When did development of the TF108 begin ?
We made our first decisions about the direction we would take with the TF108 towards the end of the 2006 season. Since then, gradually we have increased our work on the TF108 in parallel to developing the TF107 throughout the season. However, after the Japanese Grand Prix in September, we switched our efforts 100% to the new car.
Has there been a major change for the TF108 ?
The aerodynamic concept of this car has changed. The TF107 was an evolution of the TF106 but this time the new package is a departure from recent Toyotas . The primary aerodynamic design philosophy for the TF108 is geared towards optimising the entire package to minimise balance and downforce changes throughout a lap, thereby producing a more driveable, aerodynamically robust car. In addition to the aerodynamic philosophy, another fundamental change is the wheelbase, which is longer. In mechanical terms we felt we had a strong basis in the TF107’s characteristics so we have focused on making a few refinements. We have made refinements to improve the weight over stiffness ratio with better structural efficiency, so we achieve the same stiffness values with less weight.
Why change the wheelbase ?
This was a decision we had to take at the very beginning of the TF108 project, for obvious reasons as it has a huge impact. The main reason for making this decision is to achieve more stability, but secondly we also expect greater aerodynamic development potential, giving our aerodynamicists wider surfaces so more space to play with.
Has the TF108 hit our targets in wind tunnel tests and other simulations ?
I am pleased to say the TF108 is on target, the aerodynamic efficiency and associated performance metrics continue to improve rapidly, but of course the real test will come when it runs on the track. The TF108 looks great and we are very excited to see it in action to learn if it lives up to our high expectations.
How ambitious were our targets ?
At Toyota we believe in setting challenging targets so we always aim high. When we did the comparison to other teams and what they were achieving in terms of performance, it was quite straightforward for us to deduce what targets we should be aiming for and what kind of aerodynamic figures we should expect to get. We knew what we wanted to achieve with the TF108 but setting the target is easy, the challenge is to deliver performance on the track.
Which areas did you identify to improve ?
In 2007, the performance overall was not where it had to be so there were obviously some weaknesses. The objectives for TF108 development are aerodynamic efficiency and drivability. For 2008, we want a car offering a wider operating window. This has been achieved through a better understanding of the key aerodynamic stability metrics, in addition to judicious whole car flow control and thermal management.
Are there obvious visual differences ?
Of course. One of the most visible changes is the combined use of suspension turning vanes, barge boards and undercut sidepods.
How much effort has gone into the TF108 ?
Everyone involved in this project has put an enormous amount of effort into the TF108. We started this car really early, with key decisions made at the end of 2006 to allow us to make an early start on developing the overall concept. Since then, the TF108 team have pushed hard to keep the project on schedule in terms of timing and in terms of the results we are getting in simulations and in the wind tunnel. The TF108 is the result of a great effort from everyone, from the team who designed it, to the wind tunnel, test bed and simulation guys who tested it and then our colleagues who built and assembled it. Getting a new car ready for its first test is inevitably a race against time but everyone has done a great job.
What’s next for the TF108 ?
Everyone has worked very hard to get to this stage but really the work is far from being complete. Now we will focus first on understanding the characteristics of the car on the track in order to steer set-up and development directions. This starts with the roll out on January 13 at Jerez . There is a lot of work to do to get the most out of the car before the season starts so there will be no let-up in our efforts.
Will there be a B version of the TF108 ?
We have no plans to introduce a B-spec version of this car but we will introduce significant new packages as the season goes on. The first new package will be on the car in Australia for the first race.
How has the Toyota Way been implemented in the development of the TF108 ?
The Toyota Way is in our blood so of course the principles and methods are used in the way we organise our resources and the way we deal with problems. The Toyota Way is now embedded in our philosophy.
This is the second year of the current tyre regulations, how has the team adapted the TF108 to the situation ?
In most cases you adapt to a new tyre situation by adjusting some key concept parameters on the new car. There are significant factors you must get right to use the tyres correctly, such as the weight distribution window or the camber change. We know from the TF107 that we got these characteristics in the right window so for the TF108 we expect to be in a position to work within our usual set-up parameters to get the best out of the tyres. Of course, we are still learning every day how to truly get the maximum out of the tyres because there are always small improvements to be made. The tyres for this season will be very similar to 2007, with just a subtle construction change which will be minor in terms of its effect on the car.
Has the team learned lessons from its 2007 performance ?
In Formula 1 you are always learning and that is especially true in our case. Our learning curve is probably steeper than most other teams’ simply because we are a relatively young team. We have learned lessons in terms of car performance, race management and start management. The positive thing about mistakes is that they make you stronger when handled in an efficient and constructive way. We still have work to do if we are to compete with the best teams but we are constantly learning and continuously improving.
What are your objectives for 2008 ?
Personally, I believe the target should be to fight systematically for the podium in 2008. Next year we should aim to achieve what BMW Sauber achieved in 2007, which was to be the best of the rest. It would not be realistic to talk of fighting for the title this year but we want significant improvement.
