After many months of trying, the Providence Engineering Academy was finally able to secure a field trip to see… well, a field! Peabody Stadium, an integral part of the sporting complex at Santa Barbara High School for almost 100 years, has been greatly in need of renewal for a range of reasonsâ€”regular flooding, surface maintenance, seating capability, ADA complianceâ€”and our engineering students were given a sneak peek at the behind-the-scenes process!
Our own neighborhood! Peabody Stadium (old image) to the upper left, and Providence School to the lower right
A quick walk across Canon Perdido Street brought the group to the construction trailers, where Mat Gradias from Kruger Bensen Ziemer Architects, Inc. met them and introduced them to some members of the construction and design team. Mat has been involved with the Santa Barbara ACE Mentor Program, which several of our students (Eva, Victor, and Seung) have attended for the past two years.
Mat showed the construction plans, and described to the group some of the challenges facing the team, from sourcing grants to managing city wastewater ducts to preserving the “look and feel” of the local neighborhood. The team’s original completion date was April 2019, but is now projected for the middle of August.
Josh, Gabe, Victor, Ben, Todd, Colby, Eva, Alena, Claire, and Madison facing north; behind is the new southern grandstand
There’s a lot of mud and dust right now, but over the next few weeks there’ll be seeing bright green artificial turf laid out. Regular flooding issues will be a thing of the past, with clever water management systems in the event of severe rainfall. Seating capacity will be greatly improved, and highly directional lighting and sound seeks to minimize light and noise pollution for the surrounding areas. The state-of-the-art track surface will be the only one of its kind for a hundred milesâ€”a type of high-tech material that is known for producing world records.
The Engineering Academy was very grateful to Mat and the other presenters, and they’re already excited to see the finished product!
The Providence Engineering Academy seeks every year to put skills to use for the benefit of the community. From designing playground equipment to running science lessons, “we have an obligation to turn our skills outward to the world around us; we learn not for our own sakes” (quoted from the Engineering Academy application).
This year, the Advanced Engineering I students took on a challenge from our very own fitness guru, Scott Mitchell. Mr. Mitchell, who teaches middle school P.E. and runs our outdoor education program, is passionate about his craft. He wants students to understand the human body, in terms of both structure and motion. Mr. Mitchell has long used tensegrity structures as an analogy to help students visualize these principles.
What’s a tensegrity structure, you ask? While a formal definition is somewhat elusive, you know it when you see it. Popularized by the architect Buckmister Fuller and his student, sculptor Kenneth Snelson, these structures feature “compression members floating in a sea of tension.” Still confused?
The engineering class began with some small models, using elastic bands for the tension elements and wooden dowels for the compression struts.
Victor with the most simple of all tensegrity structures: three sticks not touching
Victor and Todd with a six-member icosahedron
Josh finds a new use for the 12-stick version
As simple as these look, they take a great deal of effort to plan and assemble. But this was not the end goal; our class aimed to build a giant version of the icosahedron, with compression members 8 feet long!
Attempt 1: A lot of knots tied to create 24 rope members. Attached lag bolts to 20 lb beams. Got it together and realized that everything was way too loose. Too much sag. Took it apart.
Alena carefully loops the non-slip knot over the bolt
Ben gets those bolts secured
Inital success and exuberance, but everything is far too loose
All rope connections shortened by 5 inches to tighten things up. Unfortunate result: humanly impossible to pull together. Mr. Mitchell attempted to complete the final connections under great duress. Failure, bent bolts, and an abandoned attempt.
Attempt 3: Straightened out bolts. Loosened all rope lengths by 2 inches. Realized that we can do this the easy way, working with the structure and not against it. Beams held in different orientation. Pulled it all together, but some bolts bent again. Much tighter, much easier, good result!
Colby and Todd compare the 8-foot version to the 12-inch!
Practice makes perfect! Rechecked all ropes, and found a few that were too long. Replaced all bolts with thicker ones twice as strong in bending. Worked in new orientation and got it together in under 10 minutes! (Compare this video to the last.)
Mr. Meadth tests it out before anyone else–in the name of safety, of course!
Todd climbs inside once everything is approved
In case it’s not clear from the pictures and videos alone, it has to be emphasized that none of the wooden beams you see are touching each other. Each of them is “floating in a sea of tension”, held in place by the 24 ropes. This is despite the fact that the entire structure weighs about 160 lb (73 kg).
Here’s another interesting observation: in the interest of safety, we strapped a force gauge to the ropes, and measured 150 lb of tension. (These ropes are rated up to 300 lb, so no problem!) But when Mr. Meadth climbed up on top, weighing about 155 lb himself, the rope tension only increased to 190 lb. How fascinating that 155 lb of live weight does not increase the rope tensions by that amount.
In fact, three people at one time were able to climb up on the structure (totalling more than 300 lb), but the max load reading never exceeded 250 lb, with no evidence of any structural problems.
It’s stable, folks! It beautifully and naturally distributes extra load all around to find equilibrium, much like the human body. Even as it moves, it naturally corrects, distorts, and stabilizes. Watch Todd roll a few feet in the following video.
Needless to say, Mr. Mitchell was delighted with the outcome, and brought his middle school P.E. students over to see, touch, and feel its dynamic responses. He taught them that the wooden beams are analagous to our bones, and the tensioned ropes are like our ligaments and tendons and muscles. Inspired by the work of Anatomy Trains, it’s easy to see what happens when our bodies are injured or out of alignment.
Great work, students! Keep on dreaming, designing, calculating, and serving others! Please share this article freely with friends and family.
The annual Middle School Science & Engineering Expo was a huge success once again, thanks to the hard work and positive attitudes of so many students, parents, teachers, and staff. This year’s theme of The Human Machine inspired a range of hands-on explorations, from Masa and Cameron’s tennis and baseball clinic, to Heidi and Ella’s eye dissection, to robotic prosthetic hands built by the Intro to Engineering class.
Harry, Ruby, Isabela, and James show off their robotic hands
Elementary students get in on the action!
Masa shows Mr. Sunukjian how it’s done!
Mr. Alker worked hard with every 8th Grade student over a period of several weeks to hone their demonstrations to perfection. With such a rich inspiration as the human body itself, students were well able to explore athletics, biology, physics, and engineering.
Never too young to begin! Providence class of 2033?
Mr. Alker explains the human lung to a captive audience
Maya walks her family through the inner workings of the human digestive system
Zach, Isaiah, and Sam with their lung test apparatus
Mr. Meadth also brought some high school engineering students to show off their recently completed gliders. High school 3D printers were running hot all the while, courtesy of Todd and Alena, producing Providence keychains for our guests.
Mr. Hurt, high school science teacher, measures his heart rate alongside Ava
Heidi and Ella showing the inner workings of a cow’s eyeball, much to the delight of visiting parents
Todd and Alena busily keeping those printers running on behalf of the high school Engineering Academy
With sweet treats provided by parent volunteers (thank you!) and Mrs. Luy welcoming guests at the gate, there were plenty of smiles all around. Good things are happening at Providence! For more information about middle school science, please contact Mr. Alker. For more information on our engineering programs, please contact Mr. Meadth. Don’t forget to check out the other articles on this blog, and subscribe for automatic updates.
Ella helps two elementary students fill out their scavenger hunt
Abby and Liza calculated the energy delivered in tasty snacks