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A heavy-duty cart designed to transport heavy loads in deep underground mine tunnels was the top project presented at the April 22 Engineering Expo at Raven Precision Agricultural Center.

The transporter was built by 日本av视频 mechanical engineering students Braden Hanson, Luke Degen, Haley Evenson, Alli Krantz, Phil Baker and Tyson Boeve on behalf of the Sanford Underground Research Facility, the former Homestake gold mine in Lead that now is a physics research facility.

The 4-foot wide and 12-foot long cart is designed to carry six 600-pound liquid nitrogen containers up and down a freight elevator and on a three-quarter-mile long existing rail track in the former mine鈥檚 shafts. Currently, one person uses a dolly to move one container, which is used in physics experiments. The process of moving six containers now takes all day. With the transporter, which were tested April 28-29, all six can be moved in 30 minutes.

The team built the cart for $13,900, just under its $15,000 budget. The students said an industry estimate to build a similar unit would be $37,000.

After the expo, it was trucked out to Lead and reassembled. Students demonstrated the unit April 28-29 and turned the cart over to SURF.

Finishing second among the 43 entries at the Engineering Expo was the redesign of the control system and ducting of a large commercial proof box for the Flandreau Bakery. It was undertaken by electrical engineering students Jens Enga and Isaac Kvokov.

Third place was an autonomous soil sampling rover built by Seth Koeppe, Josh Lamb, Landen Knoshal, Brandon Kellenberger and Cody Kramer, who are a mix of agricultural and biosystems engineering and mechanical engineering majors.

Among those viewing the seniors work were 180 students from Harrisburg, O鈥橤orman and Britton-Hecla high schools. In addition, there was an admissions tour of high school juniors who had expressed an interest in engineering education. Including parents, there were just over 200 in that group.

Todd Letcher, an associate professor in mechanical engineering who teaches senior design, said, 鈥淭he Engineering Expo is my favorite day of the year. Eight months ago, all we had was a problem presented to us by a project sponsor. It took a lot of hard work, but the teams have fully designed, prototyped, and tested projects that are fully functional and ready to be handed back to sponsors. 

鈥淥ur students work so hard and I鈥檓 very proud of all of them.鈥�