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BACKCOUNTRY SKIING AT SUN VALLEY
Get PDFhttps://digitalcommons.cwu.edu/local_authors/1031/thumbnail.jp
Balsa Wood Bridge Senior Project
Get PDFFor all of human history, people have been working to increase efficiency. This project followed in that pursuit by forcing engineers to create a 400 mm long bridge out of only balsa wood and glue that could withstand over 20 kgs of force with the bridge weighing a maximum of only 85 grams. The bridge also needed to have a lifting mechanism to raise it 140 mm above the starting position.
To accomplish this task, a strong truss needed to be built. Balsa wood is strong in compression so a truss with more beams in compression was used. Statics was used to determine the stress on each beam in the truss. The beams under more stress needed to be thicker to hold the weight placed on the bridge. Other beams were thinner to decrease the weight of the bridge. Balsa wood strips were purchased, cut down to size using a miter saw, and glued together. The lifting mechanism was created by fixing one end of a string to the bridge and the other to a reel, with a tower between them so that the string lifted the bridge upwards. The parts for the lifting mechanism were all purchased.
After testing, the bridge withstood over 20 kgs before collapsing. The top beams of the truss broke first. The lifting mechanism was also successful and the bridge rose above the required height of 140 mm and did so in less than 10 seconds
RC Baja - Drivetrain and Chassis
Get PDFThe ASME RC Baja competition is an event held every year where mechanical engineering technology students get a chance to use their accumulated knowledge of engineering and the engineering process to design and build an RC car to compete against one another at the event. The students of Central Washington University participating in the event were paired up into teams of two to work on a car. This report will discuss the drivetrain and chassis of the car, the suspension and steering were the responsibility of the project engineer Tanner Howington.
The project included the design and analysis of the various components of the chassis and drivetrain, utilizing various methods of statics, dynamics, and mechanical design such as beam deflection, impact forces, analyzing stresses, etc. The project team decided to make the car out of various materials including carbon fiber, aluminum and 3D printed parts. The testing of the vehicle included various speed and acceleration tests as well as impact, climbing and testing of the electronic drivetrain components, “i.e. battery.”
During the testing phase of the project, it was determined that the car was able to meet the top speed, acceleration and constant speed requirements. The car was able to achieve an average speed of 25 mph, and was able to accelerate to top speed in under 15 seconds. The car was also able to climb inclines at least 30 degrees above parallel and the performance of the battery far exceeded the requirements set by the drivetrain and chassis engineer
Jack and Alex RC-Baja
Get PDFTeams of two mechanical engineering students were tasked with the construction of an RC Baja car qualified by the rules and regulations of the Baja competition as well as specifications set by the individual team member for their portion of the vehicle. This proposal focuses on the Chassis and Drivetrain of the vehicle while team member Jack Stutz oversaw the steering and suspension. Teams will compete against each other in various modes to determine the best vehicles of the competitors. The chassis was made of standard aluminum, the remaining parts made by the students were made with PLA; both materials are durable, lightweight, and inexpensive. Standard 3mm screws of various sizes will be used to fashion the various parts together. The car will be subjected to various tests prior to the competition to ensure the capability to complete the Baja tracks. The first test will focus on the efficiency of the motor by testing that the motor can run continuously for five minutes and didn’t reach a temperature over 135°F, only 96% of the required maximum temperature. The deflection test consisted of testing determined a 15.5lb-f was required to make the chassis to reach the maximum allowable deflection of 0.5mm. The final test was to test the vehicle’s maximum speed on a straight-line runway and resulted in a top speed of 22mph
Radio-Controlled Baja Car
Get PDFThe Central Washington University RC Baja competition tests students’ skills in engineering in a matter of ability to design, construct and test an RC car. The objective of this senior project is to manufacture efficient suspension and steering systems for an RC vehicle and compete at the end of the school year against other students’ vehicles. Two races will be conducted during the competition, the RC vehicle will compete in a slalom-and-sprint and a Baja. Using more than one manufacturing method and material was expected of students to create the steering and suspension systems. Through CAD software and 3D printers most of the suspension structure was created, machining created most of the steering components and purchasing parts provided the electronics and other integral parts. All the parts were created based off common RC models and changed based on analyses of materials and forces expected during competition. Tests that the RC vehicle will be subjected to include impact, speed and angle tests to ensure the vehicle meets requirements. The first test is a drop from two feet above the ground in which the suspension arms don’t deflect more than 0.3 of an inch, passing the set requirement. The second test is driving on different terrains reaching set top speed of 20 MPH, which it does. The third test is targeted towards steering and meets the desired 60 degree turn angle for the front tires set by the requirements
RC Baja 2023 Drivetrain and Chassis
Get PDFStudents’ objective this quarter was to design a remote-controlled vehicle that utilizes a 4-link rear suspension, an I-beam front suspension, the ability to withstand a substantial front impact and several gearing options. The team also used several agreed upon design requirements to quantify the results of the objective.
To meet these objectives students followed a strict engineering method. Students split into a team’s divided the work into two sections. Max was responsible for the suspension and steering and Nathan was responsible for the chassis and drivetrain. Methods included engineering analysis which used mechanics of materials, static analysis, dynamic analysis, and mechanical design. Students used these methods to make effective designs using green sheet analysis. This allowed students to confidently manufacture designs knowing that the components would be strong enough for specified design requirements. Methods continued into winter quarter when students began manufacturing. Manufacturing methods included 3D printing, CNC machining and 2D sheet-metal.
These actions resulted in a functioning vehicle at the beginning of spring quarter. The vehicle was successful in completing design requirements including a deflection of less than 15mm after a 15lb frontal impact. The vehicle was found to have 9mm of deflection 60% of the requirement. The vehicle also had the option of a 9:1, 12.8:1 and 11:1 gear ratio with no modifications using it’s adjustable geartrain. The vehicle met the expectations of the previous objective as well as met the design requirements generated in fall quarter. Students competed in the RC baja competition in April 2023
Tennis
No full textFive CWSC tennis players posing for a photo.https://digitalcommons.cwu.edu/john_foster_photos/2492/thumbnail.jp
Football \u2764-\u2765
No full textTwo CWSC football players speaking with a coach during the 1964-65 season.https://digitalcommons.cwu.edu/john_foster_photos/2499/thumbnail.jp
Football \u2764-\u2765
No full textTwo CWSC football players speaking with a coach during the 1964-65 season.https://digitalcommons.cwu.edu/john_foster_photos/2504/thumbnail.jp
Track v. Portland
No full textCWSC track team members running at a track meet against Portland in 1967.https://digitalcommons.cwu.edu/john_foster_photos/2509/thumbnail.jp