FSAE (EV) Design Spec Sheet 2017
Competitors: Please read the Instructions-Tips (tab below) prior to the completion and submission of this sheet.
Car No. E17
School Swinburne University of Technology
Dimensions Units
Overall Dimensions mm Length: 3087 Width: 1354 Height: 1122
Wheelbase & Track mm Wheelbase: 1530 Front Track: 1100 Rear Track: 1050
Center of Gravity Design Height mm CG Height: 244 Confirmed Via: Tilt Test
Mass without driver kg Front: 96 Rear: 156 Total: 254
Weight Distribution with 68kg driver % Front: 43 % Left: 50
Suspension Parameters Units Front Rear
Tire Size, Compound and Make Hoosier 18x7.5 - 10 R25B Hoosier 18x7.5 - 10 R25B
Wheels (width, construction) 8" wide, (offset here)mm offset 8" wide, (offset here)mm offset
Suspension Type Uneven-Length non-parallel A-arms, Direct Acting 4-way adjustable Ohlins Dampers, Coil Springs Uneven-Length non-parallel A-arms, Direct Acting 4-way adjustable Ohlins Dampers, Coil Springs
Suspension design travel mm Jounce (col D): Rebound (col E): 25 25 Jounce (col G): Rebound (col H): 25 25
Wheel rate (chassis to wheel center) N/mm 49.9 87.6
Roll rate (chassis to wheel center) NM/deg 864.5 1091.5
Sprung mass natural frequency Hz 4.56 5.13
Jounce Damping % critical 75 at __ mm/sec: 75 70 at __ mm/sec: 75
Rebound Damping % critical 90 at __ mm/sec: 75 98 at __ mm/sec: 75
Motion ratio _.__:1 0.796 Type: Rising Rate 0.726 Type: Rising Rate
Ride Camber (Rate of Camber Change) deg/m 57.1 96.2
Roll Camber deg/deg 0.49 0.25
Static Toe (- out, + in) deg -1.5 1.0
Static camber deg -1 -0.5
Static camber adjustment method Shims between upright and upper suspension point Shims between upright and upper suspension point
Anti dive / Anti Squat % Up to 49.9 0
Roll center height above ground, static mm 10 20
Roll center position at 1g lateral acc mm Height (col D): Lateral (col E): 10.07 -1.18 Height (col G): Lateral (col H): 20.2 18.5
Front Caster, Trail, and Scrub Radius Caster (deg): 6 Kin Trail (mm): 9 Scrub Rad (mm) 15
Front Kingpin Axis Inclination (deg): 5 Offset (mm): 35.5
Static Ackermann % 98.5 Adjustable? No
Suspension Adjustment Methods Rod-end bearings on upper a-arms, adjustalble length steering tie-rods, adjustable height chassis brackets
Steer Ratio, C-Factor, Steer Arm Length Steer Ratio (x:1) 4.34 c-factor (mm) 98.96 Steer Arm Length 70 mm
Brake System / Hub & Axle Units Front Rear
Rotors Floating, 135 X 5 mm, Bis 80, vented Floating, 135 X 5 mm, Bis 80, vented
Master Cylinder Push Type, 3/4", Balance Bar Push Type, 3/4", Balance Bar
Calipers Custom, Aluminum 2024 Billet, 1" Piston, 4 Piston Custom, Aluminum 2024 Billet, 1" Piston, 2 Piston
Brake Pad/Lining Material Bendix, custom compound Bendix, custom compound
Force and Pressures @ 1g Deceleration Front Pres. (bar): 48.5 Rear Pres. (bar): 48.5 Pedal Force (kN) 0.65
Upright Assembly 7075 T6 Aluminum, CNC machined 7075 T6 Aluminum, CNC machined
Hub Bearings OD: 62mm ID: 40mm Width: 12mm Deep Groove Ball OD: 62mm ID: 40mm Width: 12mm Deep Groove Ball
Axle type, size, and material Rotating hub, 30mm, 7075 T6 Aluminium Rotating hub, 30mm, 7075 T6 Aluminium
Ergonomics Units
Driver Size Adjustments Sliding Track Adjustable Pedal Box, Seat insert
Seat (materials, padding/damping) Composite Construction Moulded
Steering Wheel (dia, construction) Diamter (mm) 240 Construction MOMO
Shift Actuator (type, location) NA
Clutch Actuator (type, location) NA
Instrumentation Ignition and fault LED's, Pack Voltage Indicator LED's, RGB Feedback LED Indicator
"Optional:
(e.g., Driver Safety Systems, etc.?)" N/A
Electrical (non-drive systems) Units
Power Management / Control Induvidually fused custom fuseblock with regulated supplies, cooling and battery management system
Wiring / Loom / ECM mounting Mil-W-81044 concentrically twisted wiring harness with keyed aerospace connectors
Battery / Charging System 2x independent auxiliary 16Ah/14.8V Graphene Lipo
Grounding Permanently grounded single piece aluminium honeycomb core backed with star ground wire in looming
Driver Assist Systems Electronic Differential System, Traction Control
Logging / Telemetry Vector GL2000 Data Logger, CAN Logging, 4X Analogue Inputs
Special Sensing Technology Accelerometer, Shock Potentiometers, Optional Tyre Temperature Sensors
Frame Units
Frame Construction Full Monocoque
Material Carbon fibre skins and Aluminium Honeycomb core
Joining method and material Bonded Carbon Fibre Composite
Bare frame mass with brackets & paint kg Target: 25 Physical Test:
Torsional stiffness N-m/deg Target: 3900 Simulated: Physical Test:
Torsional stiffness validation method Physical Torsional Stiffness Test
Impact Attenuator configuration Impaxx 700 Foam Standard Impact Attenuator Type 13
Impact Attenuator dimensions mm Width: 305 Height: 350 Depth: 255
Impact Attenuator energy capacity kJ Energy: Method:
Tractive Drive Power System Units Front Rear
Motor Manufacturer / Model / Type N/A Enstroj Emrax 228 HV Combined Cooled
Motor Technology utilized 3 phase Permanent magnet synchronous
Motor Count and Location(s) 2 x independantly conrolled inbound motors
Driven Wheel Count & Location(s) 2 x independantly conrolled rear wheels
Nominal Motor Voltage (phase and volts) P, V Phase (col D): Voltage (col E): Phase (col G): Voltage (col H): 3 250 RMS
Maximum Design Motor RPM (1/min) rpm 5500
Base Speed (max torque until xx RPM) rpm 5500
Maximum Motor Torque (peak) Nm for Xsec 240 Nm for 3 seconds
Maximum Motor Torque (continuous) Nm 125 Nm
Maximum Motor Power (peak) kW at RPM 100 kW @ 5000 rpm
Maximum Motor Power (continuous) kW @ RPM 40 kW @ 1600rpm
Motor Speed Sensor(s)? If so, what type Resolver LTN 5PP, Resolver mounted to motor plate
Significant Motor Modifications PT100 high accuracy temperature sensors
Motor Controller(s) Type / Model Rinehart PM100DZ
Motor Controller Discharge Power (peak) kW for x sec 100kVa instantaneous (200Arms)
Controller Continuous Discharge Power kW 150Arms
Accumulator Cell Manufacturer / Type Samsung, INR18650-25R 8p Modules
Accumulator Cell Voltage / Capacity Volts, mAh 2500mAh ea. / 20Ah, 4.2V / 3.6V Nominal
Accumulator Voltage (fully charged) V 420
Accumulator Cell Technology/Chemistry LiNiCoAlO2 (NCA)
Accumulator Cell Configuration 100s8p
Accumulator Discharge Power (peak) kW for x sec 140kW / 5 sec, rest 12 sec.
Accumulator Discharge Pwr (continuous) kW 80
Accumulator Full Charge Time hrs:min 3:00
Accumulator Charging Efficiency % 92% Nominal
Accumulator Charging Power kW 3
Torque Control Modes (vectoring, etc.) Electronic Differential, Traction Control
Other Special Components N/A
Drivetrain Units
Drive Type Spur gear, single stage reduction
Differential Type (if used) Electronic
Final Drive Reduction Ratio _:1 2.22:1
Vehicle Speed @ max power (design) rpm kph 1st gear: 155 2nd gear: N/A 3rd gear: N/A
Vehicle Speed @ max power (design) rpm kph 4th gear: N/A 5th gear: N/A 6th gear: N/A
Half shaft size and material 20.05mm, 12mm bore, S150 Case Hardened Steel
Axle Joint type Dual Plunging Tripod
Aerodynamics (if applicable) Units
Type / Configuration Front wing, Undertray and Sidepods
Forces (at 80 kph, ρ= 1.162 kg/m^3) Downforce (N): 190 % Front: 52 Drag (N): 133.4
Coefficients & Reference Area Cl: 0.8372 Ref. Area (m^2): 0.791 Cd: 0.5878
Noteable Features (active, etc) Adjustable front wing mainplane
Other Information Units
Body Work (material, process) Infused kevlar/carbon nose cone, sidepods and undertray
Optional Information N/A