Analysis: The results of this test showed that Prototype #1 was the only one to fail, while the others remained stable and didn’t slip. However, it was decided that Prototype #2’s yoke design did not have enough of a difference from Prototype #1’s yoke design, so only one was selected to continue testing. Prototype #1 was selected because it used the same yoke as Prototype #4 and that could be used to compare the effectiveness of the foot in the next test. Prototype #5 and #6 were not tested because the test was terminated due to testing resulting in the same results for three consecutive prototypes. As a result, Prototype #1, #3, and #4 will be tested further to fully evaluate the effectiveness of each combination.

Analysis: Prototype #4 was established as the most effective because of its consistency with holding the bike upright. It only had one failure over all three terrain tests, while Prototype #1 and Prototype #3 had two and three failures, respectively. The final prototype will be tested according to the design specifications and used to determine the force placed on the prototype.

Analysis: This test used three different values to determine the average force put on the prototype, which was 6.39 N or 1.44 pounds. 6.39 N of force equates to 5.1 mph, per the equation above, meaning wind gusts at this speed or greater could potentially knock over the bike. However, the bike is designed to be aerodynamic and resistant to these wind forces, so this would prevent it from being knocked over. Furthermore, the prototype was tested on a bike in conditions with wind gusts of 14 mph, yet it did not fall over due to wind. Further testing with more advanced technology could be done to determine if wind is a substantial factor in the stability of the Rear Axle Support. Also noted was that the prototype slips a few times before completely failing, as shown by the various peaks in the graph. This slipping is helpful because the bike will slowly fall and allow for the cyclist to notice and safely catch the bike.

Analysis: The results of this test show that Prototype #4 complies with the design specification of easy transportation as demonstrated by its ability to fit into common athletic bags. It also proved that it can fit multiple types and sizes of bikes. Already determined was the prototype’s ability to hold the bike upright, therefore fulfilling another design specification. The prototype’s weight was found to be 283 grams, which is less than the predetermined 430 gram limit. The only criteria not met was the cost, as the cost of production is currently greater than the price that stakeholders said they would be willing to pay. However, the feedback was not specific to this product, so consumers may be willing to pay more for the Rear Axle Support. Prototype #4 passed the test, meeting 80% of the design specifications.

After conducting multiple tests on various versions of the Rear Axle Support, it has been found that Prototype #4, with Yoke #1 and Foot #2, is the best option. This prototype is compliant with the majority of the design specifications and has shown it is stronger than other prototypes on multiple terrains, proving this design is a valid solution to bicycle stability without kickstands.