Aurora II

Aurora-II received the EDS award for "Best Use of Aerodynamics in Design"
Fastest time from Louisiana , MO to Fulton, MO
Aurora-II speed record for the fastest daily leg average speed
Finished 2nd in Sunrayce 95
Finished 2nd in Junior Class of the 1995 WSR, and 9th overall


General Data

Length: 16.70 ft (5.09 m)
Width: 6.3 ft (1.92 m)
Height: 3.25 ft (1.0 m)
Wheelbase: 8.1 ft (2.49 m)
Trackwidth: 4.4 ft (1.35 m)
Clearance: 0.83 ft (0.24 m)
305 lbs (138 kg) w/o driver and batteries
613 lbs (278 kg) w/o driver
794 lbs (360 kg) w driver
CdA: 1.652 ft2 (0.154 m2)
Cd: 0.14(CFD Prediction)
Frontal Area(A):
11.80 ft2 (1.10 m2)
Wheels: 3
Number of Flats: 2
48 spoke 3 cross, 20 inch (50.8 cm) wheels with spoke covers.
ACS 20 x 1.9 in (50.8 x 4.8 cm) knobby tires @ 100 psi. Custom quick release hubs and bearing housing.
Crr: 0.0050
Removable Body Parts:
1 solar array/upper body
Composite sandwich structure of Kevlar/Carbon Fiber with Nomex and Polyurethane foam core.
Prefabricated Graphite panels were used as stiffners and to tie the top and bottom body surfaces of the car together.
Bubble style, custom manufactured canopy via vacuum forming.
Controls and Instruments:
Foot actuated throttle and brakes
Cruise control
Bicycle style speedometer/odometer
All other vehicle data monitored via telemetry to support vehicle

Dual front hydraulically actuated disc brakes with braided lines for safety.
Front discs are custom manufactured from 6061 aluminum
Secondary braking is provided by bicycle style brake on read wheel
Regenerative braking on rear wheel
Front Suspension:
Double A-arms with air/oil spring damper.
Linkage design incorporates zero bump steer and advanced zero scrub geometry.
Rear Suspension:
Hybrid double A-arm/trailing arm made of Chrome-moly with air/oil spring damper. The single rear wheel is supported on one side for quick release and wheel changes. Shock mount is integrated with the roll bar support. The motor is mounted to the lower arm.
Rack and pinion steering with postive steering stops. Custom quick release composite steering wheel with a magnesium steering shaft and adjustable Ackerman angle.
Fiberglass/Nomex sandwich composite panels were used to assemble a monocoque structure.
Battery enclosures, electronic enclosures, roll bar and vehicle belly pan are integral structural members.
Frame is nonconductive for driver safety.
Single reduction direct drive chain to rear wheel

Unique Mobility, DR086s
3.2 kW rated, 4kW max, 6000 RPM
84 volts
90% efficient
93% peak efficiency
8 lbs (3.6 kg)
Blower cooling for motor
Unique Mobility CR10-100
96% efficient
99% peak efficiency
12 lbs (5.5 kg)
Solar Cells/Array:
ASE Americas, Monocrystalline Silicon
1129 cells
14% single cell rated efficiency
13% overall panel efficiency
3 facets on the top, and one as the array extension underneath(which is reorientated during charging peiods)
Panel Voltage:
117 Volts provided by the top array, and 94 Volts provided by the array extension
Type of Panel:
Total array area is split into four facets, total area is 84.05 ft2 (7.8 m2)
Array was encapsulated with optical silicone adhesive and Tefzel
Power Trackers:
4 AERL peak power trackers, 1 lbs (0.45 kg)
98% efficient
99% peak efficiency