Now that the Formula Student European series has wrapped up for 2016, its time to recap with a summary of each Swedish Formula Student teams season. We will feature one team per day during this week. This will be an opportunity for SVEA members to understand not only the projects themselves, but also how the teams spread out over Sweden and how each have approached and achieved in their own way.
Our second entry of the week is Chalmers University and their team Chalmers Formula Student (CFS), based in the home of the Swedish automotive industry, Gothenburg. The team competed at both the UK and German competitions with their second fully electric vehicle, which features a two wheel driven layout and is the lightest vehicle the team have built in their history.
CFS are quite unique in the Formula Student series in that they effectively start with a brand new team every year and project engineer Arez Mohideen explains the set-up behind this. “At Chalmers, Formula Student is run as a course as it is considered to be a perfect project for the CDIO (Conceive, Design Implement Operate) pedagogical framework. We are responsible for and take part in the whole product development process, from idea to final product.” Quite an achievement and current given the focus of the automotive industry to reduce their delivery time to market. Arez explains in further detail “We start with a four week pre-study phase by setting a team goal, gaining knowledge on our competitors and also the prior CFS vehicle concepts. The team works in subgroups that have a specific focus areas on the car. The nine week long design phase follows and at the end of this, the car is fully designed in a virtual world.”
After only 13 weeks they have assembled a complete virtual vehicle and I query how the team are sure of the strength of their design. “You need a fast car, but it’s equally important that it’s tested and reliable, as it is not only the fastest teams with biggest budgets that win! So we focus a lot on Computer Aided Engineering – simulating as much as possible – but backing this up with physical testing to ensure that the design is solid.” Arez explained that one of the highlights of the team goal was to design for manufacturability and this was key for the 12 week manufacturing phase. He had simple advice in the design phase which helped “Avoid all designs that you don’t have a manufacturing solution for!” and this is important given that the students manufacture a high percentage of the vehicles themselves.
It paid off for CFS as, with 720km of driving completed during their 12 week test phase, the team achieved 6th place overall at the UK competition – which was the highest placed electric vehicle in the UKs combined powertrain format – and 9th place overall in the electric vehicle class at the German competition. An impressive achievement, however Arez was keen to highlight that the final positions are not the most important learning to take away from the year. “Formula Student is an innovative educational framework that challenges the limit of creativity and engineering skills of the students. More importantly, it produces the next generation of top class vehicular engineers.”
We definitely agree with Arez and it is why SVEAs parent organisation FISITA, and many of our international partner organisations (IMechE, SAE, ATA, to name a few) all support and run the Formula Student competition series.
The SVEA board and members wish you all the best and look forward to your return in 2017!
|Track [mm]||Front: 1200 Rear: 1200|
|Center of gravity design height [mm]||295|
|Total mass (without driver) [kg]||193|
|Suspension & Unsprung mass|
|Tyres||18” x 6” -10, LC0 Hoosier|
|Wheels (width, construction)||7” x 10”, 11mm offset, 3 piece Al rim|
|Suspension||Double Unequal length wishbones|
|Brake rotors||Front: 195x4, toolox steel Rear: 186 x 4,5, toolox steel|
Two PMSM from Aros Electronics AB
45kW per motor at 7000RPM
|Accumulator voltage (fully charged) [V]||
|Accumulator cell chemistry||
Two stage single reduction, one per motor
|Transmission reduction ratio||
|Vehicle speed at maximum rpm [kph]||129|
|Chassis & Aerodynamics|
|Chassis||One piece CFRP monocoque|
|Downforce at 80kph [N]||1048|
|Dragforce at 80kph [N]||432|