Deep Dive: Formula Student Team Delft DUT15

 

The Formula Student competition allows engineering students to design, develop, and build forward-looking race cars in a bid to secure jobs in top-rung series like IndyCar, WEC, and Formula 1. It’s a great format, and often really does produce some seriously innovative ideas. Even so, it’s rare for outsiders to get an up-close-and-personal look at a Formula Student race car.

For fans of crazy race cars, though, it’s Christmas in July- because Racecar Engineering magazine just published an incredibly detailed look at Team Delft’s all-electric DUT15 racer, and the Delft guys released their own excellent and informative video (above) showing how their advanced, aerodynamic contender comes together.

I won’t re-print the RE article here (that would be crazy illegal, anyway), but I will give you a sense of just how far they get into the DUT15 by including their “DUT15 Specs” table and a sample of the type of photos and captions they included to entice you to go over there and checking out the DUT15 for yourself. Enjoy!

 

Formula Student DUT15 Specs


Class Class 1
University Delft University of Technology
Team Name Formula Student Team Delft
Country NL
Car Number 1
Team Website www.fsteamdelft.nl
Facebook Account www.facebook.com/fsteamdelft
Twitter Account www.twitter.nl/fsteamdelft
Length, width, height, wheelbase 2834mm/1426mm/1195mm/1530mm
Track (front/rear) 1200mm/1200mm
Weight of car (no driver) 160kg
Weight distribution including 68kg driver (front/rear) 112kg/116kg
Suspension (front/rear) Double anti parallel unequal length CFRP A-arms. Front pull rod, rear push rod actuated vertically oriented spring and damper.
Tyres (front/rear) 368 x 209.5 – R10 Apollo
Wheels (front/rear) two-piece CFRP
Brakes (front/rear) Metal matrix composite aluminium brake disks with modified brake calipers
Chassis construction Single-piece CFRP monocoque with honeycomb core
Engine (Electric motor for alternatively fuelled vehicles) 4x AMK DT5-14 electric motors
Bore/stroke/cylinders/cc (Electric motor spec for alternatively fuelled vehicles) 32.5kW / 3.4kg
Fuel type (Type of Energy Storage for alternatively fuelled vehicles) Electric
Fuel system (Accumulator Spec for alternatively fuelled vehicles) 7.2kWh Lithium polymer accumulator
Max power/max torque 4x 32.5kW @ 11000rpm / 4x 28Nm @ 0rpm
Transmission Four one-stage planetary gearboxes
Differential Self-developed slip ratio and yaw-rate controller
Final drive 10.8:1

 

Formula Student DUT15 Close-Up


One design concept that has carried over from the DUT14 is its unique wheel layout, with external brake discs. On DUT15 the concept integrates part of the brake caliper with the upright reducing weight even further. On the inner face of all four wheels sit the hub motors.

One design concept that has carried over from the DUT14 is its unique wheel layout, with external brake discs. On DUT15 the concept integrates part of the brake caliper with the upright reducing weight even further. On the inner face of all four wheels sit the hub motors.

updut2_evdrive

The new design of the accumulator, which provides the energy to the four electric motors, can store 7.2 kWh of energy. This is an increase of 12% with respect to the accumulator of the DUT14. Simulation showed that the increase of energy capacity is more favorable although the weight increases. The result is that the car can have a higher average velocity during the endurance. Though during the endurance at Silverstone the Delft drivers had to drive at a reduced speed in order to last the distance, something the teams main rivals ETH Zurich failed to do.

 

Source | Images: Formula Student Team Delft, via Racecar Engineering.





About the Author

I've been in the auto industry 1997, and write for a number of blogs in the IM network. You can also find me on Twitter, at my Volvo fansite, or chasing my kids around Oak Park, IL.