SPR13e Gracy

Season 2013

Design goal: Reliability

100 kW

Motor power

1080 Nm

Torque

264 kgs

Total weight

Engine

1x YASA-750 brushless DC Motor
Control system: Sevcon Gen4.Size8 and dSpace MAB II
LiFePo battery (96S1P, system developed in-house)
Completely self-developed BMS (slave boards in the HV battery, master implemented in MAB)
Oil cooling with OptiCool fluid (all components in series)

Gearbox

Power transmission via tripods
Differential: Drexler Formula Student
Planetary gearbox (1.44 : 1)

Suspension

V: Pull-Rod with 4-way damper (variably adjustable)
H: Push-Rod with 4-way damper (variably adjustable)
Wheel suspension: Double wishbone made of CFRP
Tire manufacturer: Hoosier
Rims: OZ Racing
Steering: PSS steering gear with progressive steering angle characteristic

Electronics

CAN bus
HMI (Human Machine Interface)
Optimized cable routes (automotive standard)
Replaceable wiring harness
LV: 12V

Chassis

Structurally analyzed, MIG/MAG-welded tubular lattice frame
Material: E235/E355
Fire Wall: 0.5mm GRP laminated with UL94V0 resin
Crash box: Impaxx 700 covered with CFRP
GRP outer skin

Aero

First aerodynamics package
Front & rear wing
Underbody
Downforce: 240N at 60km/h
DRS (Drag Reduction System) in the rear wing

A racing car rarely drives alone.