1993 "Maize & Blue" University of Michigan Solar Car

The 1993 Maize & Blue solar car was built by the University of Michigan Solar Car Team during the period from 1990 to 1993.

The car was raced in two races. The car won a national championship in Sunrayce 93, the predecessor race to the North American Solar Challenge. It then went on to finish 11th in the 1993 World Solar Challenge. Maize & Blue is now part of the permanent display at the Museum of Science and Industry in Chicago, Illinois. The car had an evolutionary design descended from the General Motors Sunraycer and the University of Michigan's first generation car, Sunrunner. The car is considered an early example of and demonstration platform for energy efficient automobile design.

Team[edit]

The University of Michigan Solar Car Team was founded in 1989 and has been in continuous existence since. The team, composed of University graduate and undergraduate students as well as faculty advisers has competed in many major races including the World Solar Challenge and the North American Solar Challenge. The team that raced in 1993 was the second generation "Maize & Blue" team (team tradition dictates that each team names their car and that team is known by the name of their car). The Maize & Blue team was formally established in October 1990 and completed in December 1993.

Over a unique three-year period for the team, they designed the car, built a prototype chassis, tested the prototype, built the race vehicle and then tested that vehicle in preparation for the two races.

The team was founded by a few individuals and grew to its peak of several hundred students from all academic disciplines. During design and construction, the team was at its largest in numbers. During testing and the actual races, the team shrunk to a core group dubbed the "race crew" composed of approximately 30 students and advisers.

Over the course of the project the team included at least 260 student members (see list of known team members below). Note that not all team members participated for the duration of the project (more than 3 years) or contributed the same amount of time and effort. One team member of note is Larry Page,^[1] seen at the top left of the photo at right, co-founder of Google, who participated in the early phase of the project but did not play a significant role in the final phases. In total approximately 70,000 hours of student labor were invested in the project.

Design[edit]

Maize & Blue combined technology typically used in the aerospace, bicycle, alternative energy and automotive industries. Unlike typical race cars, Maize & Blue was designed with severe energy constraints imposed by the race regulations. These rules limited the energy to only that collected from solar radiation and as a result optimizing the design to account for aerodynamic drag, vehicle weight, rolling resistance and electrical efficiency were paramount. Conventional thinking had to be challenged, for example, rather than a conventional automobile seat which would weigh tens of pounds, Maize & Blue employed a nylon mesh seat combined with a five-point harness that weighed less than 3 pounds.

One of the cutting edge, at the time, processes that the team employed in designing Maize & Blue was computer aided design. CAD was used to design almost all of the car using Dassault Systems' CATIA and then modeling the physical characteristics using SDRC I-DEAS and other programs most running on some IBM RS/6000 Unix workstations donated by team sponsor IBM. At the time, CATIA was being used to design the Boeing 777, the first commercial airplane fully designed using CAD. Initially several hand built foam quarter scale models were constructed and tested in the University of Michigan's subsonic low turbulence 5' x 7' wind tunnel. This testing was instrumental in determining the ultimate vehicle configuration. Once finalized, the body of the car was NC milled in quarter scale from the CATIA model and verified in wind tunnel testing. On May 8, 1993, Maize & Blue was tested in a full scale wind tunnel at Lockheed's facility in Atlanta, GA.

Fundraising[edit]

Obtaining cash and in-kind donations was critical to the completion of Maize & Blue. Early on in the project, the team created a dedicated group focused on raising funds. Team sponsors ranged from the University of Michigan itself to corporate sponsors and university alumni. In total, there were hundreds of sponsors who contributed to the project. Corporate sponsors included Ford Motor Company, IBM, Northwest Airlines, General Motors, 3M, Magnetek, TRW, Monroe, BASF, Dana Holding Corporation and many others. Among the individual alumni sponsors, University of Michigan alumni Charles Hutchins stood out as a major contributor.

Testing[edit]

Component, system and vehicle testing was a continual process throughout the project and began very early on in early 1991. An initial vehicle design for Maize & Blue had a three-wheel configuration with one wheel in front which afforded significantly improved aerodynamics but introduced handling concerns. In 1991, the team built a "test buck" which was used to evaluate the handling characteristics of the tricycle configuration. As a result of these tests, the design was abandoned in favor of a more conventional, and more stable, four-wheel configuration. In early 1992, the team constructed a prototype chassis based on the final vehicle design for Maize & Blue. This prototype chassis was tested in excess of 1,000 miles on closed courses, primarily the Michigan International Speedway in Brooklyn, Michigan. A final round of vehicle testing was conducted in San Angelo, Texas, at the Goodyear Proving Grounds and on nearby roads. Also, the team completed three days of testing on the actual race route the week prior to the start of the race (primarily to get a feel for the actual route and traffic patterns).

Sunrayce 93[edit]

There were three qualifiers for Sunrayce 93; the first two several months prior to the race start and the third "last chance" qualifier held in the weeks before the actual race start. The qualifiers were used to determine that the vehicles met all of the race regulations and also to determine the starting positions. Maize & Blue completed the qualifier held at the Indianapolis Motor Speedway and qualified to start in the 10th position.

The race was held over seven days from June 20–26, 1993. The race began at the recently opened Ballpark in Arlington (now known as Ameriquest Field) in Arlington, Texas and finished at the Minnesota Zoo in Minneapolis, Minnesota.

By the end of the first race day, Maize & Blue had moved from 10th into 1st place, just a few minutes ahead of the second place car from Cal Poly Pomona. Pre-race favorite Cal State LA suffered debilitating electrical failures on day 1 putting them out of contention for the remainder of the race. Over the next three days, the team jockeyed for position at one point falling behind first place by as much as 20 minutes, primarily due to two penalties levied by race officials for violation of traffic rules.^[2]

On day 5 of the race, the weather forecast called for rain and overcast conditions for most of the day. Maize & Blue was the only car to finish that leg of the race under its own power (the Iowa State University car finished ahead of Michigan, but incurred a 10-hour penalty for replacing their battery pack at the start of the day^[3]). On day 5, the Michigan team accumulated a 90-minute lead over the next fastest car.

Days 6 and 7 were uneventful with Maize & Blue maintaining its lead and finishing in first place overall followed by Cal Poly Pomona in second and Cal State LA in third. Maize & Blue finished with an average speed of 27.29 mph over the 1100-mile course edging out the second place car by 90 minutes.^[2] The victory gave Michigan its second consecutive national championship in solar car racing.

1993 World Solar Challenge[edit]

Between Sunrayce 93 and the 1993 World Solar Challenge, the team made many changes to Maize & Blue, the two most important being replacing the lead acid battery pack with an equivalent capacity silver-zinc pack which resulted in a significant weight savings and the other being replacing about 40% of the solar cells with high-powered "Green Cells" produced specially for the team by Dr. Martin Green at the University of New South Wales.

Unfortunately, as a result of an assembly flaw during the encapsulation process the new cells were unable to produce peak power output resulting in lower total array power. There were other minor changes to the vehicle designed to reduce weight or aerodynamic drag (the most notable with the removal of all decals except those required by race officials).

Maize & Blue finished in 11th place in the 1993 World Solar Challenge. Honda won the 1993 World Solar Challenge followed by the team from Biel University. Maize & Blue finished the race ahead of the 1990 University of Michigan Sunrunner's record of 5 days, but that was not enough for a top finish.

Vehicle specifications[edit]

Body:

Drag Coefficient, Cd: 0.115
Frontal Area, A: 1.16 m^2 (12.53 ft^2)
Drag Area, CdA: 0.133 m^2 (1.44 ft^2)
Measured full scale in the Lockheed, Atlanta, Georgia, 4.9 x 6.1 meter (16 x 20 foot) wind tunnel with boundary layer blowing to simulate moving ground plane

Chassis:

6061-T6 Aluminum tubing space frame, 2.54 cm (1 in) OD, 0.11 cm (0.045 in) wall
Carbon/Nomex body, Kapton insulators between panel and body
Weight w/o Driver: 358 kg (790 lb)
Length: 5.75 m (18.87 ft)
Width: 2 m (6.56 ft)
Height: 1.1 m (3.61 ft)
Wheelbase: 2.2 m (7.22 ft)
Track Width: 1.89 m (6.20 ft)
Clearance: 0.45 m (1.48 ft)

Wheels and Tires:

36 spoke, 43.18 cm (17 in.) wheels with spoke covers;
Michelin 43.18 x 3.18 cm (17 x 1.25 in.) slick tires @ 150 psi
Number of wheels: 4
Est. Tire Rolling Resistance Coefficient: 0.0060

Brakes, Suspension, and Steering:

Hydraulic motorcycle disk front brakes
No emergency brake (used chocks)
Custom titanium suspension parts. Modified MacPherson strut with Monroe custom shocks in front, 86 lbf/in (15.1 N/mm). Separate coil spring. Trailing arm rear, with 236 lbf/in (41.3 N/mm) coil over shocks
Rack and pinion steering with two redundant push-pull cables

Transmission:

Direct drive chain to rear wheel
2.06/1 ratio typical

Electronics:

Motor: Custom Magnetek DC brushless, 1.8 kW rated, 3.7 kW max, 2250 RPM, 100 volts, 14.5 kg (32 lb), 93% efficient at operating power level, 95% peak efficiency. Blower cooling
Controls and Instrumentation: Constant power / constant speed motor controller. Telemetry of voltages, currents, temperatures, and speed to chase van
Batteries: Eagle Picher, 3 parallel packs, 96 volts, 4.8 kW·h, 54 A·h, 154 kg (340 lb)

Solar Cells:

Type of Solar Panel: Fixed panel with eight gently curved facets
8 facets of 3 modules each
BP Solar Saturn Cells, Laser grooved, Monocrystaline Silicon, 7615 cells, 90% area packing, 17% single cell rated efficiency, 16.3% mean single cell observed efficiency measured at TRW in Redondo Beach, CA. Average was for 8000 cells processed. Overall panel efficiency 14.5%, 1300 watts peak. Note that for the World Solar Challenge approximately 40% of the array of BP cells was replaced with higher efficiency silicon cells manufactured by Dr. Martin Green at the University of New South Wales
8 AERL peak power trackers
Panel voltage: 130 volts

Press[edit]

Maize & Blue and the team received prominent press coverage and recognition including:

The University Record July 19, 1993, by the Regents of the University of Michigan
Australian Broadcasting Corporation November 7, 1993
Popular Mechanics September 1993, page 104
CNN Early Prime, June 20, 1993, 3:25PM, (0:30)
CNN Headline News, June 27, 1993, 5:57PM, (0:25)
CBS This Morning, June 23, 1993, 8:33AM, (4:00)
NBC Saturday Today, June 5, 1993, 7:50AM, (1:30)
Fox KSHB-41, Kansas City, June 23, 1993, 10AM Live, (15:30)
PBS Scientific Frontiers^{[permanent dead link]} hosted by Alan Alda, November 3, 1993, (20:00)
Michigan Today, October 1993, Volume 25, Number 3, Cover Story
Ann Arbor News Sunday Edition, April 11, 1993, page C1
Ann Arbor News April 10, 1993, Cover Story
Michigan Daily, October 2, 1993, page 5

Post racing[edit]

After the two races, the team set about finding a permanent home for its car, Maize & Blue. At the conclusion of a several month long process, the car was donated and accepted into the permanent display at the Museum of Science and Industry in Chicago, where it now resides as part of its Transportation Gallery exhibit.

Beginning in early 1994, the Maize & Blue team began the transfer and hand over to the third-generation team and thus concluded the project.

Notes[edit]

^ Team member Birger de la Pena recalls "I actually worked with Larry a fair amount, he was on the signal electronics sub-team. He worked on the side with control systems and such. Alas he was mostly involved in the beginning phases of the project. It is something I remember vividly. One anecdote I remember was that once when I visited his apartment he had broken apart an Apple Stylewriter and turned it into a full size Inkject Plotter. This was at a time when Ink-jet technology was cutting edge and all plotters were pen plotters, there was no such thing as an Ink-jet plotter on the market." ^{[citation needed]}
^ ^a ^b Popular Mechanics, September 1993
^ PBS Scientific Frontiers^{[permanent dead link]} hosted by Alan Alda, November 3, 1993, (20:00). Accessed 2009-05-28. Archived 2009-05-30.

External links[edit]

List of team members[edit]

Name	Role	Name	Role	Name	Role	Name	Role
Abdou, Michael	Sub-team Leader	Filip, Andrew		Liles, Jeremy		Ross, Daniel	Business Team Leader, Race Crew
Abernethy, Craig		Forman, Mike		Lin, Jerry		Roth, John
Agrawal, Gautam		Franzky, Tiffany	Sub-team Leader	Linn, Sascha		Rozas, Carlos
Agrawal, Sanjiv		Feishler, Jeff		Litherland, Craig		Rupp, Matthew
Ahmad, Atiya		Frolik, Jeff		Liu, John		Samsons, Andris	Driver, Chassis Team, Race Crew
Aldstadt, Jared		Gabel, Brian	Aero/Body Team	Lockhart, Collin		Sander, John
Andrejevic, Mark		Gabel, Shawn	Aero/Body Team	Loh, Henry		Sandhu, Gagandeep
Arkinson, Heather		Garcia, Chito	Faculty Adviser	Long, James		Sartor, Cara
Armbruster, Ed		Gearhart, Kristine	Sub-team Leader, Race Crew	Low, Tah		Schell, Dawn
Aziz, Hannan		Geiss, Doug		Lukachko, Stephen	Aero/Body Team Leader, Race Crew	Schroeder, David
Bankstahl, Mark		Gibson, Mike	Graphics Team Leader	Magee, Michael		Schwartz, Cam
Barringer, Dan		Greenshaw, Brian	Sub-team Leader	Marsh, Jeff		Scolaro, Christopher
Bartlo, Joseph	Head Meteorologist, Race Crew	Hansen, Asbjorn		Masserang, Susan	Aero/Body Team	Seiler, Rebecca
Benjamin, Ken		Harris, Scott		Don	Sub-team Leader	Shaffer, Robert
Benjamin, Stefanie	Chassis Team, Race Crew	Hernacki, Brian		May, Scot	Aero/Body Team	Shah, Chirag
Berg, Hans		Herr, Melissa		McGuire, Danyielle		Shih, Paul
Beuther, Dave		Hewitt, Kevin		Mell-Case, Tenicka		Shin, Chae
Bielby, Sara		Heydt, Jeffrey		Mentzer, Charles (Chad)	Power Team Leader, Race Crew	Shore, Norm
Block, Gavin		Hibbard, Tim	Sub-team Leader	Messing, Dawne		Shum, Raul
Bokniak, Dave		Higley, Scott		Mizzi, Pamela	Design Team	Slimko, Eric	Aero/Body Team Leader, Head Strategist, Race Crew
Bork, Anne		Hilbert, Elizabeth		Monroe, Bob		Smith, Edmond
Borus, Mike		Hjung, Mike		Montgomery, Kevin		Smith, Gene PhD	Faculty Adviser, Race Crew
Bradley, Joe		Ho, Richard		Moore, Travis		Smith, Len
Brewer, Jim		Hoagberg, Amy	Sub-team Leader	Moorthy, Ramesh		Smolinski, Sharon
Brotherton, Mark		Hoggard, Chad		Morris, Johnathan		Soh, John
Buzman, Adalberto		Hohnson, Nicole		Morrison, Ted	Sub-team Leader	Soh, Tzeyun
Cain, Kevin	Sub-team Leader, Race Crew, Driver	Hollister, Todd	Chassis Team Leader	Nazeeri, Furqan	Project Manager, Race Crew	Spague, Ben
Calas, Chris		Holt, Richard		Neal, Michael	Chassis Team Leader	Stander, Matthew
Calligaro, Michael		Hopkins, Alan		Nee, Markus	Aero/Body Team	Starrman, Jennifer
Camblin, Lesley	Assistant Project Manager, Race Crew	Hopping, Ryan		Nelson, Nancy	Faculty Adviser, Race Crew	Steffe, Mark
Carmody, Andrew	Systems Coordinator, Race Crew	Hoyi, Brian		Newman, Adam		Steven, Chappell
Chan, Kim Fung		Hudecek, Andrew		Noveloso, Charles		Stonev, Gregory
Chang, Howard		Iagnemma, Carl		O'Ryan, Cahan		Sullivan, Armeka
Che, Denise		Jensen, Craig		Oates, Robert		Sullivan, Brian
Chen, Robert		Jones, Karen		Oberliesen, Michelle		Sun, Grace
Chittle, Matt		Kaak, Laura		Ortiz, Bernard		Swan, Scot
Cho, Dave		Kaiser, Adam		Page, Larry	Electronics Team	Sy, Michael
Cho, James		Kalleberg, Lance	Conceptual Design, Wind Tunnel Testing	Pai, Wallace		Tang, Howard
Chung, Marcus		Kanemoto, Mike	Graphics Design Team	Pan, Alfred		Tenniswood, Steve
Clark, JK		Kanitz, Dan		Parekattil, Sijo		Theis, Bryan	Logistics Team, Race Crew
Cohen, William		Karnopp, Bruce PhD	Faculty Adviser	Parol, Jason		Tom, Christine	Sub-team Leader
Conley, Chris		Keesee, Kreg	Sub-team Leader	Parpart, Dawn		Valencia, Marinelli
Conrad, Jason		Kegley, Melissa		Passerello, Kimberly		Van Kampen, Jeri
Corbin, Adam		Keinath, Donald		Patel, Amisha		Velthoven, Mike
Corrado, Joe		Kennedy, Kevin		Patel, Dilip		Vijan, Baljit
Cosnowski, Bill	Race Team Manager, Race Crew	Kibiloski, John		Patel, Ketan	Electronics Team Leader, Race Crew	Wagner, Matt
Coulston, Scott		Kim, Bobby		Patel, Mihir		Walberer, Andrew	Power Team, Battery Strategist, Race Crew
Crowley, Jennifer		Klain, Seth		Pawlusiak, Phillip		Walsh, William
Crumrine, David		Koerkel, Don		Pinto, Rahul		Warner, Andrew	Chassis Team Leader, Crew Chief, Race Crew
Cruz, Anthony		Kott, Jennifer	Power Team Leader	Pirich, Chris		Watt, Chris
Cua, Albert		Koziel, Adam		Poh, Alfred		Weedman, Alan
Czajkowski, Kevin	Strategy	Krause, John		Poll, Scott		Westbrook, Craig
D'Allessandro, Frank		Krauss, Alan		Pollock, Joshua		White, Elizabeth	Race Crew, Driver
Daiga, Ed	Sub-team Leader	Kreger, Kristina		Quesenberry, Michael		Whitney, Mike
de la Pena, Birger Miguel (T)	Electronics Team, Race Crew	Kronowitz, B. Lowell	Business Team Leader	Radoicic, John		Wickham, Steve	Adviser (Magnetek), Race Crew
Decker, TC		Ku, Elizabeth	Sub-team Leader	Ramos, Joe		Willis, Michael
Dempsey, James		Kulie, Mark	Weather Team, Race Crew	Ramsey, Bernadette		Winton, Deanna	Chassis Team, Race Crew, Driver
Deshpande, Akshay	Sub-team Leader	Kurnik, James		Rathur, Bilal	Aero/Body Team	Wong, Aldrin
Diaga, Ed		Kwon, Eugene		Rechtien, Catherine		Woodman, Dan
Dobbs, Debra		Kwong, Bonnie		Reece, Jeff	Chassis Team, Race Crew	Wozniak, Len	Electronics Team
Dodds, John		LaJoy, Sandra	Sub-team Leader	Reimer, David		Wright, Jeff
Duvadkar, Chaitanya		Lam, Mei Li	Assistant Project Manager	Remenak, Michael		Yang, Robert
Eaton, Dennis	Adviser (IBM), Race Crew	Lapinsohn, Laura		Riley, Beth	Business Team	Yates, Harry	Sub-team Leader, Race Crew
Edwards, Paul		Lee, Choon		Rinke, Tom	Chassis Team	Zajac, Gary
Elders, Greg		Lee, Ian		Ristow, Alan	Power Team Leader	Zaremba, John
Ellerthorpe, Shawn		Lee, Paul		Rogers, Bruce		Zhong, Xin
Ferree, Eric		Likovich, Robert		Rohde, Mitchell		Zoltowski, Jeff	Weather Team, Race Crew

[Page-1] Team member Birger de la Pena recalls "I actually worked with Larry a fair amount, he was on the signal electronics sub-team. He worked on the side with control systems and such. Alas he was mostly involved in the beginning phases of the project. It is something I remember vividly. One anecdote I remember was that once when I visited his apartment he had broken apart an Apple Stylewriter and turned it into a full size Inkject Plotter. This was at a time when Ink-jet technology was cutting edge and all plotters were pen plotters, there was no such thing as an Ink-jet plotter on the market." ^{[citation needed]}

[Victory-2] Popular Mechanics, September 1993

[Lead-3] PBS Scientific Frontiers^{[permanent dead link]} hosted by Alan Alda, November 3, 1993, (20:00). Accessed 2009-05-28. Archived 2009-05-30.

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