Good enough to engineer a model car – powered only by sunlight – and race it in timed trials with increasing payloads on its frame?
This challenge may sound best-suited for the researchers at MIT, but on Oahu 850 young engineers, grades five through eight, accepted it as part of the Department of Education and Hawaiian Electric’s Solar Sprint.
Applying STEM – science, technology, engineering, and math – skills, the students paired up to build lightweight, bare-frame vehicles designed to support a mini photovoltaic panel and small electric motor. Those who met basic performance requirements advanced to the Solar Sprint Exhibition.
Held at Kapolei High School’s sunny tennis courts, the Solar Sprint first involved two timed trials, where the cars were loaded with 12 ounces of lead weights and required to race down a 20-meter course within 25 seconds. Easy enough, no?
Then came the twist. After completing the initial races, the students were hit with a surprise challenge: transform their solar-powered cars into solar-powered emergency vehicles, complete with a siren that could be turned on with a switch.
This new challenge required critical thinking, problem-solving, and collaboration. Students had to divert some energy from the electric motor to the switch and siren – a small buzzer – which required wiring and mounting the new equipment onto the bare frames. Six more ounces of lead weights were added, for a total of 18 ounces. The transformed emergency vehicles then had to run the sprint with no additional source of energy other than the single, mini solar panel.
Needless to say, only the best-engineered cars could pass the test!
Students participating this year came from Dole Middle, Highlands Intermediate, Kailua Intermediate, Kaimuki Middle, Kapolei Middle, Laie Elementary, Makaha Elementary, Nanakuli Elementary, Niu Valley Middle, Waianae Elementary, Waianae Intermediate, and Waipahu Intermediate Schools.