ASC 2021: Friday morning, July 30

Well, in Topeka, Kansas it is the morning of the FSGP – the track-race portion of the American Solar Challenge. Only 4 out of 12 cars have qualified so far – the veteran Gato del Sol VI from Kentucky; the brand-new Brizo from Illini (the University of Illinois team); the brand-new Cruiser Freya from the University of Minnesota Solar Vehicle Project; and the brand-new Nimbus from MIT. So what does that mean?


Brizo from the University of Illinois (credit)

Well, I’m guessing that it means that two of these cars will win the track race in their respective classes. The road race, which is the main event, is still wide open, though. A bunch of other cars will make it through scrutineering today, put in some solid laps on Saturday and Sunday, and qualify for the road race. Some of those will also be strong contenders. I will keep my teams list (in the previous post) up-to-date on the status of those cars.

However, I anticipate some cars not passing scrutineering, while others hit the track but don’t qualify for the road race. That much is normal at ASC.

Update: four more teams did indeed pass scrutineering during the course of the day – Illinois State, Berkeley (CalSol), Georgia Tech, and NC State. As expected, Brizo from the University of Illinois and Freya from the University of Minnesota are leading the lap counts.


ASC 2021: the teams

The American Solar Challenge is on again this year, with scrutineering beginning on 27 July. Here is a list of the 12 teams (8 Challenger/SOV cars and 4 Cruiser/MOV cars, all from the USA) registered for the race. Regular attendees Florida, Mich St, Northwestern, SIUE, Sunstang, and UT have not registered, nor have WSC stalwarts Michigan, Blue Sky, or Stanford. In addition, sadly, Waterloo, UBC, Missouri S&T, Esteban, NJIT, Apollo, Eclipse, Bridger, GVSU, KU, UPRM, Cairo, and Durham have dropped out. Teams are sorted in team number order and, as always, you can click the social media links, and click images to zoom. You can also check out the official ASC social media at        (click on the icons).

This year, Kentucky, CalSol, Illinois St, Ga Tech, and AppState have existing cars; the other teams are intending to race newly built cars. I’m picking Minnesota and AppState as favourites in the Cruiser (MOV) class, with CalSol, MIT, Illini, and Kentucky likely to dominate the Challenger (SOV) class.

US  Kentucky 

Symmetric challenger (Gato del Sol VI) – they will be back again, after doing well at FSGP 19. They have a good, well-tested car, which recently ran its own Kentucky Solar Challenge, so they should do quite well. Current status: veteran car; OK for track race (FSGP starting position 1); OK for road race.

Previously, Kentucky came 14th at FSGP 14; came 10th at FSGP 15; came 12th at ASC 16; came 7th at FSGP 17; came 3rd at FSGP 19; and won FSGP 21.

 
Left: credit / Right: credit (click images to zoom)

US  MIT Solar Electric Vehicle Team 

Asymmetric challenger (new car: Nimbus) – they have said goodbye to Flux, and have built a new car. As a top team, I expect them to do well. Current status: new car revealed; OK for track race (FSGP starting position 4); OK for road race.

Previously, MIT came 23rd at WSC 15; came 12th at FSGP 14; came 5th at ASC 18; and came 2nd at FSGP 21.

 
Left: credit / Right: credit (click images to zoom)

US  UC Berkeley Solar Vehicle Team (CalSol) 

Symmetric challenger (Zephyr) – they are a late addition to the ASC list. They raced their Cruiser in Australia as number 66 (read about their Australian adventures here), but this time they are racing their older (Challenger) car. Current status: veteran car; OK for track race (FSGP starting position 6); OK for road race.

Previously, CalSol participated in the WSC 19 Cruiser class; came 15th at FSGP 14; came 7th at FSGP 15; came 9th at ASC 16; won FSGP 17; came 6th at ASC 18; came 2nd in the FSGP 19 Cruiser class; and came 5th at FSGP 21.

 
Left: Anthony Dekker / Right: credit (click images to zoom)

US  PrISUm (Iowa State University) 

Two-seat cruiser (new car: Eliana) – their early completion of the car puts them in a solid position for the race. Current status: new car revealed; OK for track race (FSGP starting position 10).

Previously, PrISUm participated in the WSC 17 Cruiser class; came 3rd at ASC 14; won FSGP 15; came 7th at ASC 16; came 5th in the FSGP 18 Cruiser class; and came 3rd in the FSGP 21 Cruiser class.

 
Left: credit / Right: credit (click images to zoom)

17  US  Illinois State 

Symmetric challenger (Mercury 6) – I believe that they are returning with an improved version of their existing car. Current status: veteran car; OK for track race (FSGP starting position 5); OK for road race.

Previously, Illinois St came equal 16th at FSGP 14; came 3rd at FSGP 15; came 11th at ASC 16; came 5th at FSGP 17; came 12th at FSGP 18; came 7th at FSGP 19; came 4th at FSGP 21; and came 13th at Abu Dhabi 15.

 
Left: credit / Right: credit (click images to zoom)

22  US  Illini (University of Illinois) 

Monohull challenger (new car: Brizo) – they have replaced the Argo that they raced before. As a top team, I expect them to do well. Current status: new car revealed; OK for track race (FSGP starting position 2); OK for road race.

Previously, Illini participated in the WSC 17 Adventure class; came 7th at ASC 18; came 4th at FSGP 19; and came 3rd at FSGP 21. Their team number (22) is a tradition since 1995.

 
Left: credit / Right: credit (click images to zoom)

30  US  Western Michigan (Sunseeker) 

Asymmetric challenger (new car) – they are building a new car to replace Farasi, and hope to complete it in July. Current status: OK for track race (FSGP starting position 12).

Previously, W Mich came 7th at ASC 14; came 14th at FSGP 17; came 9th at ASC 18; came 5th at FSGP 19; and came 8th at FSGP 21. Their team number (30) is a temporary replacement for their usual number (786 – the sequence of digits for S-U-N on old phones), to recognize the 30th anniversary of the team’s first race in 1990.


picture credit (click image to zoom)

32  US  Principia Solar Car Team 

Asymmetric challenger (new car: Ra XI) – it is great to see this team returning to ASC. Current status: OK for track race (FSGP starting position 11); OK for road race.

Previously, Principia came 17th at WSC 15; participated at WSC 17; came 5th at ASC 14; came 5th at FSGP 15; came 5th at ASC 16; came 13th at FSGP 17; came 2nd at FSGP 19; came 7th at FSGP 21; and came 6th at Abu Dhabi 15.

 
Left: credit / Right: credit (click images to zoom)

35  US  University of Minnesota Solar Vehicle Project 

Four-seat cruiser (new car: Freya) – they are America’s Cruiser class pioneers. With their impressive record, they are probably the Cruiser class favourites. Current status: new car revealed; OK for track race (FSGP starting position 3); OK for road race.

Previously, Minnesota came 4th in the WSC 13 Cruiser class; came 5th in the WSC 15 Cruiser class; participated in the WSC 17 Cruiser class; came 5th in the WSC 19 Cruiser class; came 2nd at ASC 14; came equal 10th at ASC 16; came equal 2nd in the ASC 18 Cruiser class; and won the FSGP 21 Cruiser class. Their team number (35) is derived from the Interstate 35 highway.

 
Left: credit / Right: credit (click images to zoom)

49  US  Georgia Tech 

Monohull challenger (Endurance) – they raced this car at FSGP 19. It is quite narrow, at 1.25 m. They have had their first mock race for 2021, and have also given the car a new aerobody and vinyl body wrap. The car will also get a new array. In the longer term, they will replace this car with a Cruiser. Current status: veteran car; OK for track race (FSGP starting position 7); OK for road race.

Previously, Ga Tech came 13th at FSGP 15; came 17th at FSGP 16; came 6th at FSGP 17; came 8th at ASC 18; came 9th at FSGP 19; and came 6th at FSGP 21. Their team number (49) is taken from STS-49, the maiden flight of the space shuttle Endeavour (which was the name of their first car).

 
Left: credit / Right: credit (click images to zoom)

99  US  North Carolina State University (SolarPack) 

Two-seat cruiser (new car: SPX) – they failed scrutineering at FSGP 19, but are feeling very positive. This video tells their story. Their current plans involve modifying a commercial ICE vehicle. They are only intending to attend the track race (FSGP). Current status: OK for track race (FSGP starting position 8).

Previously, NCSU came 4th in the FSGP 21 Cruiser class.

 
Left: credit / Right: credit (click images to zoom)

828  US  Appalachian State University (Sunergy) 

Two-seat cruiser (ROSE) – they had been planning to race at WSC 19, but ran into logistics problems. They are making several improvements to the car for ASC 2021, and they stand a fair chance of winning the Cruiser class this year. They also have a hot new vinyl wrap. Current status: veteran car; OK for track race (FSGP starting position 9); OK for road race.

Previously, AppState came 6th at ASC 16; came 2nd at FSGP 17; came equal 2nd in the ASC 18 Cruiser class; and came 2nd in the FSGP 21 Cruiser class. Their team number (828) is the telephone area code for western North Carolina.

 
Left: credit / Right: credit (click images to zoom)

This page last updated 11:49 on 2 August 2021 AEST.


Flashback: the ASC 2018 teams

This time, 3 years ago. A somewhat larger field than we have this year.

The 20 solar car teams listed below (from 5 countries) are on the board for the American Solar Challenge. A few big-name teams, like Toronto and Stanford, are sitting this one out (probably because of incompatibilities between the WSC and ASC rules). And sadly, Anderson, UCSD, Principia (who raced at WSC 2017), UC Irvine, Phoenix, UT Austin, Rutgers, UC Riverside, Virginia, Northwestern, Calgary, Purdue, USC, Cairo, Sunstang, Puerto Rico, NCSU, NJIT, Alfaisal, and McMaster have dropped out.

Michigan (2), MIT (4), CalSol (6), WSU (15), Illini (22), Waterloo (24), Minnesota (35), Ga Tech (49), Esteban (55), SIUE (57), Eclipse (101), Onda (559), W Mich (786), and AppState (828) have qualified for the road race. Here is the current teams poster for ASC (as with all images on this page, click to zoom):


This teams poster shows the Cruisers in the first two columns (also available with white background and in a shirts version).

Following qualification at Motorsport Park Hastings, Nebraska, the race runs through the mountains from Omaha, Nebraska (elevation 300 m) to the High Desert Museum in Bend, Oregon (elevation 1,230 m) via a high point of 2,585 m (see my altitude chart). The schedule is:

  • Scrutineering: Friday July 6th to Monday July 9thKentucky and Missouri S&T have not passed scrutineering
  • Track racing (FSGP): Tuesday July 10th to Thursday July 12thFlorida, PrISUm, Illinois St, and Polytech have not qualified for the road race
  • Cruiser practicality judging and public display: Friday July 13th
  • Road race: Saturday July 14th to Sunday July 22nd

Long-range weather forecasts suggest a few clouds for most of the race, with full sunshine on the last leg from Burns. Here is a webcam for Grand Island, Nebraska, looking south towards Hastings (see also Gering and Farson). And here is the route map for the road race:


Route map, coloured by elevation (from −110 to 4351 m).

This year, cars in the competition are required to have four wheels and smaller solar panels, in line with WSC regulations (although “supplemental solar collectors” are permitted, and spraying water is allowed). Composite roll cages are not permitted this year. For the first time, there is a serious Cruiser class (with 5 vehicles). Cruiser scoring is roughly as per WSC 2017. Of the Challenger cars, 43% have an asymmetric/catamaran design (including 2 cars from Canada). Apart from Michigan, there are no “bullet cars.”

Under grandfathering provisions, older cars (including 3-wheel cars) can race at Motorsport Park Hastings (as a separate class) and participate non-competitively in the ASC itself (provided that they passed scrutineering and qualification for one of the previous events). Only one team (SIUE) is taking advantage of this. I have already begun my blog coverage of the event here, and you can also check out the official ASC social media at     (click on the icons).

In the teams list below, the small data diagrams show the weight, length, and width of each car, compared to the maxima for its class (for this purpose, the grandfathered cars are treated as part of the Challenger class). The team social media icons are also clickable.

OK to race  2  US  University of Michigan 

This team came 9th at WSC 2013. They came 4th at WSC 2015. They came 2nd at WSC 2017. They came 1st at Abu Dhabi 2015. They came 1st at ASC 2016. They are bringing their existing car to ASC 2018. It is called Novum, and is a GaAs monohull design. It measures 5 × 1 m and weighs 185 kg. An interesting feature of the car is the panels over the wheels, which pop out when making tight turns. The car arrived back from the WSC in January, and was modified for ASC. March saw a scouting of the route, and June a mock race. They are very much the favourites to win ASC 2018. Their team number (2) is a long-standing tradition. They were working late into the night fixing scrutineering issues – and that did the trick! Latest ASC 2018 scrutineering status was 10 green. Their FSGP starting position was 11. They have clocked up enough laps on the track to qualify for the road race as well.





photos: Anthony Dekker (top), credit (middle), credit (bottom)

Not racing 3  US  Kentucky 

This team came 12th at ASC 2016. They did 80 laps at FSGP 2017. They have built a new car for FSGP 2018 (they are, I understand, not planning to attend the ASC itself). It is called Gato del Sol VI, and is a symmetric design. It measures 4.5 × 1.75 m and weighs 240 kg. They had manufacturing setbacks with their car, and truck problems on the way to Hastings. They revealed a not-quite-complete car while travelling, and hope to compete in the track race. Latest ASC 2018 scrutineering status was 7 green, 1 yellow (out of 10). They had a suspension failure, unfortunately.





photos: credit (top), credit (middle), credit (bottom)

OK to race  4  US  Massachusetts Institute of Technology 

This team came 23rd at WSC 2015. They are bringing their existing car to ASC 2018. It is called Flux, and is an asymmetric design. It measures 4.5 × 1.91 m and weighs 182 kg. They are 3rd favourites this ASC, if they can repeat their past performance. They were working late into the night fixing scrutineering issues – and that did the trick! Latest ASC 2018 scrutineering status was 10 green. Their FSGP starting position was 8. They have clocked up enough laps on the track to qualify for the road race as well.





photos: credit (top), credit (middle), credit (bottom)

OK to race  5  US  University of Florida (Solar Gators) 

This team did 0 laps at FSGP 2017. They have built a new car for FSGP 2018 (they are, I understand, not planning to attend the ASC itself). It is called Cielo, and is a symmetric design. It measures 4.1 × 1.8 m and weighs 315 kg. They worked hard on their molds but needed to do some last-minute fundraising. They were working late into the night fixing scrutineering issues – and that did the trick! Latest ASC 2018 scrutineering status was 7 green, 3 penalty. Their FSGP starting position was 16. They will not be continuing on to the road race, however.

OK to race  6  US  Berkeley (CalSol) 

This team came 9th at ASC 2016. They did 228 laps at FSGP 2017. They are bringing their existing car to ASC 2018. It is called Zephyr, and is a symmetric design. It measures 4.92 × 1.77 m and weighs 200 kg. They had originally planned to build a cruiser called Tachyon (with plans changing from 2 to 4 seats). They were working late into the night fixing scrutineering issues – and that did the trick! Latest ASC 2018 scrutineering status was 9 green, 1 penalty. Their FSGP starting position was 10. They have clocked up enough laps on the track to qualify for the road race as well. They lost a wheel during the scrutineering brake test, but repaired it.





photos: credit (top), credit (middle), credit (bottom)

OK to race  9  US  Iowa State University (PrISUm) 

This team participated in the WSC 2017 Cruiser class. They came 7th at ASC 2016. They are bringing their existing car to ASC 2018. It is a 4-seat Cruiser (with a 15.1 kWh battery), called Penumbra. It measures 4.32 × 1.88 m (making it the shortest Cruiser) and weighs 471.9 kg, with a drag coefficient of 0.2. An interesting feature of the car is the use of bulges on the side to reduce the aerodynamic effect of the blunt end. The car arrived back from the WSC in December. They made minor modifications for ASC. They held a mock race against Minnesota on June 3, where both cars finished at the same time. They also held their usual SunRun from June 11 to 20. They were working late into the night fixing scrutineering issues – and that did the trick! Latest ASC 2018 scrutineering status was 6 green, 4 penalty. Their FSGP starting position was 17. They will not be continuing on to the road race, however. They appear to have had serious electrical problems.





photos: Anthony Dekker (top), credit (middle), credit (bottom)

OK to race  15  AU  Western Sydney Solar Team 

This team came 11th at WSC 2013. They came 10th at WSC 2015. They came 6th at WSC 2017. They are bringing their existing car to ASC 2018. It is called Unlimited 2.0, and is a catamaran design. It measures 4.58 × 1.55 m and weighs 158.4 kg. As with Michigan in 2016, they added a bulge on the side of the car to satisfy ASC regulations. They are supported by Bridgestone, and will run on Ecopia tires. They shipped their car to California on May 14, with the team following by air on 12 June, and driving the race route in reverse. This ASC marks their first competition outside Australia. They are 2nd favourites this ASC, if they can repeat their past performance. Latest ASC 2018 scrutineering status was 8 green, 2 penalty. Their FSGP starting position was 7. They have clocked up enough laps on the track to qualify for the road race as well. Their fastest lap on the track was over 80 km/h.





photos: Anthony Dekker (top), credit (middle), credit (bottom)

OK to race  17  US  Illinois State 

This team came 13th at Abu Dhabi 2015. They came 11th at ASC 2016. They did 172 laps at FSGP 2017. They have built a new car for ASC 2018. It is called Mercury 6, and is a symmetric design. It measures 4.35 × 1.35 m and weighs 270 kg. They turned up at scrutineering on Sunday. Latest ASC 2018 scrutineering status was 4 green, 6 penalty. Their FSGP starting position was 18. They will not be continuing on to the road race, however.

OK to race  22  US  University of Illinois (Illini) 

This team participated in the WSC 2017 Adventure class. They are bringing their existing car to ASC 2018. It is called Argo, and is a symmetric design. It measures 4.5 × 1.8 m and weighs 224 kg. They are particularly proud of their battery box. The car arrived back from the WSC in December. Latest ASC 2018 scrutineering status was 10 green. Their FSGP starting position was 6. They have clocked up enough laps on the track to qualify for the road race as well.





photos: Anthony Dekker (top), credit (middle), credit (bottom)

OK to race  24  CA  Waterloo (Midnight Sun) 

This team did not qualify for ASC 2016. They have built a new car for ASC 2018. It is a 2-seat Cruiser (with a 15.9 kWh battery), called MS XII. It measures 4.68 × 2.02 m and weighs 475 kg. They hope to take their car to Australia in 2019. They demonstrated their rolling chassis before unveiling their car on June 30. They were working late into the night fixing scrutineering issues – and that did the trick! Latest ASC 2018 scrutineering status was 8 green, 2 penalty. Their FSGP starting position was 13. They were granted provisional qualification for the road race.





photos: credit (top), credit (middle), credit (bottom)

OK to race  35  US  University of Minnesota Solar Vehicle Project  

This team came 4th in the WSC 2013 Cruiser class. They came 5th in the WSC 2015 Cruiser class. They participated in the WSC 2017 Cruiser class. They came 10th at ASC 2016. Basically, they are America’s Cruiser class pioneers. They are bringing their existing car to ASC 2018. It is a 2-seat Cruiser (with a 6.8 kWh battery), called Eos II. It measures 5 × 1.9 m and weighs 379.5 kg. They are particularly proud of their custom motors. They held a mock race against PrISUm on June 3, where both cars finished at the same time. They are doing regular vlogs about their ASC progress. Their team number (35) is derived from the Interstate 35 highway. They were working late into the night fixing scrutineering issues – and that did the trick! Latest ASC 2018 scrutineering status was 10 green. Their FSGP starting position was 3. They have clocked up enough laps on the track to qualify for the road race as well. They reported on scrutineering via YouTube.





photos: Anthony Dekker (top), credit (middle), credit (bottom)

Not racing 42  US  Missouri S&T 

This team came 4th at ASC 2016. They did 69 laps at FSGP 2017. They have built a new car for ASC 2018. It is called Independence, and is a catamaran design. It measures 4.45 × 1.58 m and weighs 175 kg. They are particularly proud of their super tiny BMS. They unveiled their car on April 18. They were working late into the night fixing scrutineering issues. Latest ASC 2018 scrutineering status was 6 green, 1 penalty, 1 yellow (out of 10).





photos: credit (top), credit (middle), credit (bottom)

OK to race  49  US  Georgia Tech 

This team did not qualify for ASC 2016. They did 89 laps at FSGP 2017. They have built a new car for ASC 2018. It is called Odyssey, and is a symmetric design. It measures 4.5 × 1.8 m and weighs 250 kg. They unveiled their car on April 24. Their team number (49) is taken from STS-49, the maiden flight of the space shuttle Endeavour (which was the name of their first car). Latest ASC 2018 scrutineering status was 9 green, 1 penalty. Their FSGP starting position was 12. They have clocked up enough laps on the track to qualify for the road race as well.





photos: credit (top), credit (middle), credit (bottom)

OK to race  55  CA  Poly Montreal (Esteban) 

This team came 10th at ASC 2016. They did 198 laps at FSGP 2017. They have built a new car for ASC 2018. It is called Esteban 9, and is a compact catamaran design. It measures 3.17 × 1.84 m (making it the shortest Challenger) and weighs 175 kg. They unveiled their car on April 23 and did some serious test-driving. With their zippy little car, this team is a strong contender for the top spot. Their team number (55) is the year that Western Electric began to sell licenses for silicon PV technology. Latest ASC 2018 scrutineering status was 10 green. Their FSGP starting position was 2. They have clocked up enough laps on the track to qualify for the road race as well.





photos: credit (top), credit (middle), credit (bottom)

OK to race  57  US  Southern Illinois University Edwardsville 

This team did not qualify for ASC 2016. They did 57 laps at FSGP 2017. They are bringing their existing car to ASC 2018. It is called NOVA, and is an older 3-wheel design. It measures 4.52 × 1.7 m and weighs 306 kg. For SIUE, the race is an opportunity to farewell a car which they have lightened and given a new array. They have also been working on a new battery box. Latest ASC 2018 scrutineering status was 9 green, 1 penalty. Their FSGP starting position was 14. They were granted provisional qualification for the road race. Because they have an older-style car, they are racing non-competitively.





photos: credit (top), credit (middle), credit (bottom)

OK to race  89  RU  Polytech Solar 

This team is bringing their existing car to ASC 2018. It is called SOL, and is a catamaran design. It measures 4.18 × 1.91 m and weighs 305 kg. They are particularly proud of the many Russian components in their car and their extensive media coverage. Since they originally built their car for WSC 2017 (although they did not attend), they have made modifications necessary to satisfy ASC regulations, as well as completing work on the electrical systems. They posted a nice photograph of their suspension. The team flew out on June 29, after doing an 11.7-km run on the track at Sochi on June 20, and air-freighting their car. They left this a little late, but still got their car to the track on time. When ASC is over, they plan to build a 4-seat Cruiser for WSC 2019. They were working late into the night fixing scrutineering issues – and that did the trick! Latest ASC 2018 scrutineering status was 9 green, 1 penalty. Their FSGP starting position was 9. They will not be continuing on to the road race, however.





photos: credit (top), credit (middle), credit (bottom)

OK to race  101  CA  ETS Quebec (Eclipse) 

This team came 18th at WSC 2013. They came 8th at ASC 2016. They did 174 laps at FSGP 2017. They have built a new car for ASC 2018. It is called Éclipse X, and is a catamaran design (with the driver on the left). It measures 3.95 × 1.65 m and weighs 165 kg. They are particularly proud of their low weight. They unveiled their car on May 16 and did some serious test-driving. They left for the track on July 1. Latest ASC 2018 scrutineering status was 10 green. Their FSGP starting position was 1 (because they were first through scrutineering). They have clocked up enough laps on the track to qualify for the road race as well.





photos: credit (top), credit (middle), credit (bottom)

OK to race  559  IT  Onda Solare 

This team came 10th at WSC 2013. They came 10th at Abu Dhabi 2015. They came 6th at ESC 2016. They won the 2017 Albi Eco Race and came 2nd in the Evolución class at the 2016 Carrera Solar Atacama. They have built a new car for ASC 2018. It is a 4-seat Cruiser (with a 16.8 kWh battery), called Emilia 4. It measures 4.6 × 2.06 m and weighs 320 kg, with a drag coefficient of 0.2. They revealed their car on 11 June, prior to air-freighting it on 14 June and the team flying out later. They also verified that their barbeque still works. They passed through the small Danish town of Elk Horn, Iowa on the way to the track. Their team number (559) is taken from the SS 9, the highway through Bologna, which was once the Roman Via Aemilia (hence also the name of their vehicle). Latest ASC 2018 scrutineering status was 10 green. Their FSGP starting position was 5. They have clocked up enough laps on the track to qualify for the road race as well.





photos: credit (top), credit (middle), credit (bottom)

OK to race  786  US  Western Michigan (Sunseeker) 

This team did not qualify for ASC 2016. They did 1 lap at FSGP 2017. They are bringing their existing car to ASC 2018. It is called Farasi, and is a symmetric design. It measures 5 × 2.2 m and weighs 316 kg. They arrived late with truck problems. Their team number (786) is the sequence of digits for S-U-N on old phones. Latest ASC 2018 scrutineering status was 9 green, 1 penalty. Their FSGP starting position was 4. They were granted provisional qualification for the road race.





photos: credit (top), credit (middle), credit (bottom)

OK to race  828  US  Appalachian State University (Sunergy) 

This team came 6th at ASC 2016. They did 218 laps at FSGP 2017. Members participated in WSC 2017 with the Antakari team, and they hope to take their new car to WSC 2019. They have built a new car for ASC 2018. It is a 2-seat Cruiser (with a 11 kWh battery), called ROSE. It measures 4.8 × 2.1 m and weighs 362 kg, with a drag coefficient of 0.17. They are particularly proud of the cup holders, apparently. They showed their roll cage and sanded molds, before finally unveiling their car on June 22. Their university wrote an excellent article about them. They posted a nice photograph of their suspension. Their team number (828) is the telephone area code for western North Carolina. Latest ASC 2018 scrutineering status was 9 green, 1 penalty. Their FSGP starting position was 15. They were granted provisional qualification for the road race. They are blogging here.





photos: credit (top), credit (middle), credit (bottom)

This page last updated 20:58 on 13 July 2018 AEST


ASC 2021: 2 days to go

It is now just a few days until the start of scrutineering in the American Solar Challenge (27 July in Topeka, KS). I have updated my teams list with facts and pictures.

There are 13 12 teams still registered for the race. Of these, 5 teams (CalSol 6, Kentucky 3, Illinois State 17, Georgia Tech 49, and App State 828) will be racing veteran cars – although with various improvements. In addition, the Brizo of Illini 22, the Nimbus of MIT 4, and the Cruiser Eliana of PrISUm 9 were completed some weeks or months back. Western Michigan 30, Principia 32, and Kansas 785 have not yet revealed a completed car, which is disconcerting. However, UMNSVP 35 have revealed their beautiful new Cruiser Freya:


Freya from University of Minnesota Solar Vehicle Project (credit)

Along with MIT 4, CalSol 6, and AppState 828, UMNSVP have departed for the racetrack. AppState is doing so with a hot new look:


ROSE from Appalachian State University (credit)

Update: Sadly, Kansas 785 have withdrawn from the race.


The High School Solar Car Challenge: Day 4

Today we say goodbye to the (High School) Solar Car Challenge held at the Texas Motor Speedway. Here are the official results (dashed lines show the 2019 winners). In spite of rain on Day 1, RAHS Green Energy has done very well indeed. Covenant Christian and Wylie East have both exceeded all Classic scores since 2009, thanks to thinking seriously about aero.

The beautifully engineered catamaran from Iron Lions did not live up to its full potential, because of battery problems on Day 4. However, they still came 3rd, in spite of only racing for three days. I expect to see this car to do very well in the future.

The three rookie teams (marked with black squares) have done extremely well. If the Classic and Advanced Classic cars were grouped together, Holy Solars would be 3rd, KCAL would be 7th, and WASP would be 9th out of 10.

Let me finish with the official group photo (click to zoom), and what I believe to be the correct car identifications:


Front row: Staten Island (Advanced), RAHS Green Energy (Advanced);
Second row: Plano Green Team (Advanced), Covenant Christian (Advanced), Iron Lions (Advanced);
Third row: LISA Academy (orange shirts, Advanced Classic), Prosper (Advanced Classic), Holy Solars (Classic), Kentucky Solar Cats (Classic), Iron Lions (ESP), Covenant Christian (Advanced Classic);
Fourth row: KCAL (Classic), WASP (Classic), Wylie East (Advanced Classic), MISD Shine Runners (Advanced Classic), Coppell (ESP), NTCA (Classic), Western High School Solar Cats (ESP), Heroes’ Alliance (ESP);
Rear: All Saints (Advanced), Prosper (Cruiser).


The High School Solar Car Challenge: Day 3

Here are the unofficial lap counts for Days 1 through 3 of the (High School) Solar Car Challenge at the Texas Motor Speedway. The symbols at the top of each bar refer to my car identification chart. Black squares next to names indicate new teams. The Holy Solars (from Kent School, Kent, CT) are doing especially well, but all the new teams have clocked up a respectable lap count.

There are several nail-biting contests going on (for 1st place in the Advanced Division and the Advanced Classic Division; for 3rd in the the Advanced Classic Division; for the entire podium in the Classic Division; and for 2nd in the Electric-Solar Powered Division). Also, I am glad to see Plano Green back on the track after having a bad MPPT.

As an Australian, it is interesting to reflect on the mix of U.S. schools participating in the Solar Car Challenge. Independent Christian schools like Covenant Christian Academy and North Tampa Christian Academy appear to be over-represented, as are non-standard STEM-focused public schools like Raisbeck Aviation High School (RAHS), and public charter schools like LISA Academy North Middle High School. Certainly, whatever RAHS is doing seems to be working!

Let me finish, once again, with an action shot, although this one is from Day 2 (click to zoom):


On the inside, the red-and-white Appalachian Spirit of the Kentucky Solar Cats (Classic Division) leads Black Widow from the MISD Shine Runners (Advanced Classic). Overtaking on the outside, Staten Island’s High Energy #5 (Advanced Division) leads the current Advanced Division leader Invictus from the Iron Lions (SCC race photo).


The High School Solar Car Challenge: Day 2

Here are the unofficial lap counts for Days 1 and 2 of the (High School) Solar Car Challenge at the Texas Motor Speedway. The symbols at the top of each bar refer to my car identification chart. Catamaran cars (stars) are doing well. Black squares next to names indicate new teams (the Holy Solars in particular are doing very well). All Saints and Coppell, who had problems on Monday, have started to put some laps on the board. Plano Green, unfortunately, had a bad MPPT.

Doing an analysis on the lap counts (just for today) reveals a surprising fact. For the six most aerodynamic cars (marked in blue on the chart below), performance decreases as the car gets heavier (although the correlation is extremely weak). This is just as we would expect, because of rolling resistance. However, for seven less aerodynamic cars in the Advanced Classic and Classic Divisions (marked in brown on the chart below), weight has essentially no effect. That is, the effect of weight is swamped by other aspects of car construction.

I also wonder why we have Classic and Advanced Classic divisions. Cars in these two divisions, starting from the top, go AC, AC, C, C, AC, C, C, AC, AC/C. There is a difference between the two groups (Advanced Classic: median 102 laps, mean 125; Classic: median 100 laps, mean 102.8), but this difference is not statistically significant.

Let me finish, once again, with an action shot (click to zoom):



On the inside, The Blurr from the Heroes’ Alliance (Electric-Solar Powered Div) leads the colourful Miss Fifinella of the Women’s Air Service Patrol or WASP (Classic Div), with KCAL’s Deus Volt (also Classic) at the rear. On the outside, the blue-nosed Cougar Pride from Covenant Christian Academy (Advanced Div) is overtaking, followed by Black Widow from the MISD Shine Runners, in the Advanced Classic Division (SCC race photo).


The High School Solar Car Challenge: Day 1

Here are the unofficial lap counts for Day 1 of the (High School) Solar Car Challenge at the Texas Motor Speedway. The symbols at the top of each bar refer to my car identification chart. Catamaran cars (stars) are doing well, as is the symmetric streamlined car (dot) from Staten Island. Black squares next to names indicate new teams. The Holy Solars (from Kent School, Kent, CT) are doing especially well, having built a very good-looking car.

Covenant Christian Academy’s pair of almost-identical cars are about as aerodynamic as a “table-top” solar car (dagger symbol at top of bar) can be. Their Advanced Division car, Cougar Pride, is 90 kg lighter than its Cougar Spirit partner (mostly a reduction in battery weight), with more efficient solar panels, and a hub motor (which is why it has one rear wheel instead of two). I expect Covenant Christian Academy to do very well in both divisions that they’ve entered. Nevertheless, the results so far do show the aerodynamic superiority of the catamaran design.

 
Two views of the Advanced Classic Division car Cougar Spirit from Covenant Christian Academy, Colleyville, TX (SCC scrutineering photos). It has since acquired an orange nose, to distinguish it from its blue-nosed three-wheeled Advanced Division partner.

In general, I’ve been very impressed by the dedication and skill of both the experienced and the new teams. Several of these high school teams would put university students to shame. Let me finish with an action shot (click to zoom):


Staten Island’s High Energy #5 (Advanced Div) leads North Tampa Christian Academy’s The Solar Stroller (Classic Div) which is being overtaken by the colourful Miss Fifinella of the Women’s Air Service Patrol (WASP, Classic Div). Also overtaking is the orange-nosed Cougar Spirit from Covenant Christian Academy (Advanced Classic), with KCAL’s Deus Volt (Classic) at the rear (SCC race photo).

And another one:


Wylie East’s blue East Beast–Xtreme (Advanced Classic) overtakes KCAL’s Deus Volt (Classic), which is followed by the red-and-white Appalachian Spirit of the Kentucky Solar Cats, in the same division (SCC race photo).


The High School Solar Car Challenge: car chart

As I have already said, this year I am covering the (High School) Solar Car Challenge, as well as the upcoming university competitions. The high school event (hosted by Texas Intruments) is currently taking place at the Texas Motor Speedway on July 15–22 (with Covid protocols in place). Actual racing starts on July 19.

For the benefit of those following the race from home, here is a chart of all the cars (click to zoom). The chart has been updated, and two errors corrected.

Other useful resources are:


The High School Solar Car Challenge: some physics

This year I am covering the (High School) Solar Car Challenge, as well as the upcoming university competitions. The high school event will take place at the Texas Motor Speedway on July 15–22 (with Covid protocols in place), and will be live-streamed via the event’s YouTube channel. Today I want to say something about high school solar cars in comparison to world-class cars.

 
Left: Cougar Spirit from Covenant Christian Academy is a high school car in the Advanced Classic Division / Right: Nuna11 is a world-class car from Delft University of Technology in the Netherlands (picture by @lightatwork)

The two main drag forces operating on cars are rolling resistance and aerodynamic drag. The former is indicated in the chart below by red lines. It is a function of the product of the rolling resistance Crr of the tyres times the mass M of the car in kilograms.

The aerodynamic drag is indicated in the chart below by blue lines. It is a function of the product of the drag coefficient Cd of the body shape, the frontal area A of the car in square metres, and the square of the velocity.

The chart at the bottom of the page expresses the same information in terms of the power (in watts) required to overcome drag at various speeds.

At the world-class level, where special low-rolling-resistance tyres are available and cars glide through the air like a hot knife through butter (low values of Crr M and Cd A), the aerodynamic drag is much greater than the rolling resistance at race speeds, and shaving a few percent off the Cd A value becomes critical to winning. At high school level, with cars that students can afford and racing speeds from 15 to 50 km/h (10 to 30 mph), aerodynamic drag and rolling resistance are roughly similar, and reducing the weight of the car becomes especially important. Some of the high school classes do not permit hub motors, and for those cars, reducing drive train losses is also critical.

A few high school cars in the Advanced Division are both under 200 kg and quite aerodynamic this year (e.g. Invictus from the Iron Lions and Lumidos from Oregon Solar Car Team), so it will be very interesting to see how they perform.