Design Spec Sheet
Formula Student 2010
Competitors please replace the sample specification values in the unshaded cells of the table below with those a ppropri ppropriate ate for your vehicle and submit this with your Design Report. This information will be reviewed by the Design judges and may be referred to during the Design event. Use SI Units with dual Imperial or other units if needed for clarity of specification of standard components). --Please do not modify the format of this sheet. Common formatting will help keep the judges happy! --The sample values are fictional and may not represent appropriate design specs.
Car/Class
123 / Class 1
University
University of IMechE
Dimensions Overall Length, Width, Height
Front 2390mm, 1275mm, 1010mm
Wheelbase
1625mm
Track W eight with 68kg driver
1100 mm 116 kg (full wet car weight of 190kg)
105 0 m m 164 kg (full wet car weight of 190kg)
Suspension Parameters Suspension Type
Front Unequal length A-Arms. Pu Pull rod actuated Fox Vanilla RC spring/damper units
Rear Unequal length A-Arms. Pull rod actuated Fox Vanilla RC spring/damper units
Tyre Size and Compound Type W heels Design ride height (chassis to ground) Centre of Gravity Design Height Suspension design travel Wheel rate (chassis to wheel centre) Roll rate (chassis to wheel centre) Sprung mass natural frequency Jounce Damping Rebound Damping Motion ratio Camber coefficient in bump (deg / cm) Camber coefficient in roll (deg / deg) Static Toe and adjustment method Static camber and adjustment method Front Caste ster and adjustme stmen nt me metthod hod Front Kingpin Axis Kingpin offset and trail Static Static Akermann Akermann and adjust adjustment ment met method hod Anti dive / Anti Squat
18x7.5-10 R065 Goodyear 18x7.5-10 R065 Goodyear Douglas alloy 10" x 150mm -2 -25mm offset, Douglas alloy 10" x 150mm -2 -25mm offset, 50 m m 50 m m 290 mm above ground, with driver 26 mm bump/ 26 mm droop 26 mm bump/ 26 mm droop 16=>18.16 N/mm (droop=>bump) 30.6=>40.6 N/mm (droop=>bump) 1.0°/ g, without anti-roll bars 1.9Hz 2.3 Hz 45% of critical damping at at -1 -127 mm/sec 39% of critical damping at -1 -127 mm/sec 105% of critical damping at 127 mm/sec 116% of critical damping at 127 mm/sec 1.40:1 => 1.31:1 (droop=>bump) 1.14:1 => 0.95:1 (droop=>bump) 0.68° / cm bump 0.79° / cm bump 0.7°/deg 0.7°/deg 0mm toe out adj. by tie rods 0mm toe in adj. by toe links 1°- by shims, upright or chassis 1°- by shims, upright or chassis 6°+ non-adj adjustable 3° + adjustable via shims on upright 48 mm offset, 24 mm trail 205% 205 % Ackerman Ackerman Adjust Adjustment ment throug through h shims shims und under er clevis clevis 0%, adjustable with movable inner balljoint 0%, adjustable with movable inner balljoint locations locations 54 mm above ground, CL of car 79 mm above ground, CL of car 54 mm abov above e gro groun und, d, move moves s 3 mm tow toward ard 79 mm above ground, moves 2.2 mm outside wheel toward inner wheel Front wheel steer, in line with lower A-arm and behind axle line, 12:1, 45mm
Roll center position static Roll Roll cent center er posi positi tion on at 1g lat lateral eral acc acc Steer location, Gear ratio, Steer Arm Length Brake System / Hub & Axle Rotors
Rear
Axle type, size, and material
Front Student designed, laser cut and ground from 1040 steel, hub mounted, 193mm dia. Mechanical bias bar, for base balance. 2 x W illwood Dynalite single alumimium billet caliper HR32008XJ, 2 row angular contact roller bearing 6061 Aluminium, CNC machined single billet, integral caliper mounts, bolt on clevises for adjustment Live axle, 7075 aluminium, rotary cut
Ergonomics Driver Size Adjustments Seat (materials, padding) Driver Visibility (angle of side view, mirrors?) Shift Actuator (type, location)
Fixed seat and steering wheel. Pedal box adjust fore and aft 100mm Wet lay-up carbon fibre/epoxy composite shell 105°visibility each side from straight ahead, rear view mirrors on cockpit sides L/H manual shifter, mounted to chassis rail. Solid linkage
Master Cylinder Calipers Hub Bearings Upright Assembly
Rear Student designed, laser cut and ground from 1040 steel, diff mounted, 198 mm dia. 1 x Willwood Dynalite single alumimium billet caliper HR32008XJ, 2 row angular contact roller bearing 6061 Aluminium, CNC machined single billet, integral caliper mounts, bolt on clevises for adjustment Live axle, 7075 aluminium, rotary cut
Clutch Actuator (type, location) Instrumentation
Hand lever integral with shifter Mychron 3 mini-dash mounted to steering wheel
Chassis Chassis Construction Material Joining method and material Targets (Torsional Stiffness or other) Torsional stiffness and validation method Bare frame weight with brackets and paint Crush zone material Crush zone length Crush zone energy capacity
Steel tube space frame with glued carbon fibre floor panels C350 mild steel tube - cold drawn seamless TIG welded 2700 Nm/ deg torsion, 50Hz first body mode (non-rigid) FEA 3400 Nm/deg, 2814 Nm/deg actual, 83Hz first body mode (torsion), 37kg including aluminium bulkheads Aluminium sheet 165mm 6244KJ
Powertrain Manufacture / Model Bore / Stroke / Cylinders / Displacement Compression ratio Induction Fuel Type Max Power design RPM Max Torque design RPM Min RPM for 80% max torque Fuel System (manf'r) Fuel System Sensors Fuel Pressure Injector location Intake Plenum volume Effective Intake Runner Length Exhaust header design Effective Exhaust runner length Ignition Timing Oiling System (wet/dry sump, mods) Coolant System and Radiator location Fuel Tank Location, Type Muffler
2003 Yamaha WR450 single 95.0 x 63.4 mm / 1 cylinder / 449 cc 12.5 :1 Atmospheric induction 98 octane petrol (Shell Optimax) 10,200 rpm 7,500 rpm 6200 Student designed/built fuel injection system using Haltech ECU Magnetic crank trigger, Water temp, Air temp, Throttle Pos. 3 bar (static) Twin injectors mounted on inlet track, 100 mm (approx) from valves 1.5 litre cylindrical body, 2.97 litre including taper from restrictor 260 mm, (90mm inside head, 170mm manufactured runner) stainless steel header 500 mm header, ongoing testing to determine final length Digitally programmable by engine management system Student designed aluminium dry sump Twin Yamaha WR450 radiators mounted in sidepods Floor mounted mild steel sheet tank behind seat Megacycle brand aluminium muffler for WR450
Drivetrain Drive Type Differential Type Final Drive Ratio Vehicle Speed @ max power (design) rpm 1st gear 2nd gear 3rd gear 4th gear 5th gear 6th gear Half shaft size and material Joint type
Chain #520 Zexel Torsen University Special modified. Bias ratio 2.6:1 Adjustable between 1.57-2.33 by sprocket changes. Using 2.33 Using maximum power at 10,200rpm and drive train ratio of 2.33 56 km/h 79 km/h 104 km/h 130 km/h 162 km/h - note that final ratios to be determined after testing N/A 19.7mm diameter 4140 , splined solid shafts Rzeppa style CV joints on sliding splines
Aerodynamics (if applicable) Front Wing (lift/drag coef., material, weight) Rear Wing (lift/drag coef., material, weight) Undertray (downforce/speed)
N/A N/A N/A
Wing mounting
N/A
Optional Information
