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)

Weight:

• 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

Tires:

• 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.

Canopy:

• 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

Mechanical

Brakes:

• 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.

Steering:

• Rack and pinion steering with postive steering stops. Custom quick release composite steering wheel with a magnesium steering shaft and adjustable Ackerman angle.

Chassis:

• 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.

Transmission:

• Single reduction direct drive chain to rear wheel

Electrical

Motor:

• 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

Controller:

• 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

Sunrayce 95 Race Data

Batteries:

• Delphi Automotive Systems, 7 batteries
• 5000 Whr at C/5, 60 Ahr
• 293 lbs (133 kg)

Race Awards:

• EDS "Best Use of Aerodyanmics in Design"
• Fastest time from Louisiana , MO to Fulton, MO
• Sunrayce fastest daily leg average speed
• 2nd Place Overall

Daily Awards

• 1st Place: 6/27
• 2st Place: 6/23, 6/24
• 3st Place: 6/26, 6/28
• Sportsmanship Award: 6/25

Time: 33:56:00 hours

Average Speed: 36.88 m.p.h. (59.34 kph)

Day Finished Before 6:30 p.m.: 10

Total Distance Travelled: 1,251.5 miles (2013 km)

Overall Position: 2nd

Qualifying Speed: 31.98 m.p.h (51.46 kph)

Qualifying Distance: 163 miles (262 km)

Qualifying Position: 5th

Average Race Speed: 36.88 m.p.h. (59.34 kph)

Best Daily Average Speed: 50.4 m.p.h. (81.25 kph)

Maximum Instateous Power During Race: 1100 Watts

Solar Power on a Sunny Dat at High Noon: 592 Watts

Average Solar Power while on the road: 543 Watts

Speed on 1900 Watts of Panel Power: 55 mph (88.5 kph)

Records set:

Set the record for the fastest average speed during a Sunrayce leg, THREE times.

• Previous Record: 43 mph by Cal. State Los Angeles with Solar Eagle II in Sunrayce 93 on June 27, 1993
• New Records:
  • June 22, 1995 - 43.70 mph
  • June 23, 1995 - 47.73 mph
  • June 28, 1995 - 50.4 mph

1995 World Solar-Car Rally Race Data

Batteries:

• Workhorse, 8 batteries
• 2592 Whr at C/20, 27 Ahr
• 191 lbs (87 kg)

Race Awards:

• 2nd place in Junior Class
• 9th place overall

Number of laps: 32

Average Speed: 26.79 m.p.h. (43.10 kph)

Total Distance Travelled: 617 miles (993.7 km)

Overall Position: 9th

Junior Class Position: 2nd

Acceleration Test Time: 27.78s, 32.21 mph (51.82 kph),

Qualifying Position in Class: 5th

Qualifying Position Overall: 14th

Average Lap Speed: 28.3 m.p.h. (45.5 kph)

Best Lap Speed: 33.3 m.p.h. (53.5 kph)

Maximum Instateous Power During Race: 1100 Watts

Solar Power on a Sunny Dat at High Noon: 592 Watts

Average Solar Power from 8-5 During a Sunny Day: 408 Watts

Speed on 577 Watts of Panel Power: 33 mph (53 kph)

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