MechE

Road Trip 2016: Ohio

The week following finals is usually a relaxing time to unwind, relax, and try to put those nasty tests in perspective. However, this is not true for solar car. Finals had barely finished, and the team was already abuzz with activity. The team was getting ready to leave on a road trip that Sunday for Ohio. Road trips are a strong tradition on the team, and for good reason; they offer a great chance to extensively test the solar car on public roads, get the team ready to perform in the upcoming solar challenges, and help train the next generation of drivers.

Photo Credit: Chris Pentacoff '06

Photo Credit: Chris Pentacoff ’06

This year’s road trip was during the last week of May in Columbus, Ohio. The main purpose of this road trip was to get more strategy data on Arcturus, and use Arcturus as a test bed for ideas for the next car. This included testing Arcturus with an off center center of mass to see how stable an asymmetric car would be. This road trip helped train new team members on how to work together during a solar challenge. From this road trip we now have two new solar car drivers who are both comfortable with driving at highway speeds. The data that we collected on our electrical system, brakes, balance, and stability will help improve the design for our 2017 car. The road trip helped with weeding out more issues that team can now address and prevent in future designs.

If you want to see more from the roadtrip check out our flickr

2016 Ohio Road Trip

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Test Driving at Palmer Motorsport Park

This Monday (13 July) we had a great day of testing at Palmer Motorsport Park, a new 2.3 mile track located less than two hours from the shop in the hills of Massachusetts. Palmer Motorsport Park was generous enough to donate to us this track time making them one of our newest sponsors. This track testing was extremely helpful for, as it allowed us to stress test the dynamics and handling of the car, while not having to worry about other cars on the road. We were able to push the car at high speeds through the course’s steep hills and tight turns safely. The drivers gained valuable experience with the car in these conditions and learned to drive the solar car efficiently to conserve battery energy.

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The day began rather early at our shop. We quickly loaded our gear into the truck and chase car, and headed west for Palmer, MA. Along the way there we were able to practice driving as and chase and lead for the solar car; although Arcturus was in the trailer, so some imagination was required. Once we arrived we were graciously greeted by the Owner and Caretaker, and we are able to quickly unload with their help.

DSC_1025

In the first few laps of testing we found a few minor improvements that could be made. Once we had implemented these Arcturus was running even better than before. We were then able to focus more on getting the drivers more comfortable with Arcturus, and the track. Each driver did a few slow starting laps to get used to the course’s tight turns and hills. Then each successive lap was bumped up to a higher speed. By the end of the day each driver was driving at high speeds, while also managing to be very energy efficient. They were able to better understand how to drive Arcturus at high speeds with minimal power draw, and practiced coasting and using regenerative breaking on the many downhill parts.

At the end of the day we had gotten in a good 7 hours of testing, had gathered valuable data for strategy, and even more important driver experience.

Check out some of the pictures from the day:

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Chassis

Due to WSC regulations, our new car must have 4 wheels and additional head space. These new design challenges were meet and optimized by Andrew Liotta our lead engineer who designed the chassis. Dillon McConnon, our system lead made sure the chassis integrated well with the other subsystems such as the aero shell and electrical boxes.

isometric view

solidworks rendering of the chassis design

With the design complete and tolerances adjusted, we have now begun the building process. Using 4130 steel tubes, cut and coped to fit at the correct angles the chassis is welded together. This is a challenging and precise endeavor as it is important to have a minimal gap between adjoining rods in order to make a strong weld.

setting up to weld

Priya (left) and Kathleen (right) set up the steel tube in preparation for welding

Once set up (with jigs to hold things in place) the tubes are welded together. In fabrication of the chassis, the preparation takes longer than the actual welding time. Below is a time lapse of one evening’s effort of welding done by Thomas Villalon.

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