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 Front    Rear    Left    Right    
Overall Dimensions 3087 mm, 1354 mm, 1122 mm                
Wheelbase  1530 mm   1530            
Track 1100 mm   1050 mm            
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              
(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