Hubba Bubble

In this second project for my design and engineering class we created a bike design for a certain profile that we were given. We had to create multiple designs that led up to a final model, and explain our choices included in our design. In this unit we learned about the function of bikes, and what makes them important. The different math concepts including gear ratios, graphing, etc were all used in this action project.

Persona/Needs

When designing a product it is best to use a persona. Our persona was a girl named Vanessa. She lives 4 miles away from her school. She is 17 and has a little brother that she has to take to day care every day before  school. Her house is by the United Center and Lake Shore with the streets full of pot holes, while the "L" runs down her commute to school. After taking in all this information, we took not of the needs that Vanessa had. This included safety, security, and two seats for her and her brother.

Labels/Benefits

Our bike Is called the "Hubba Bubble" which is a bike meant for a safe and reliable experience. It has features including a cushioned seat, a protective bubble around the child seat, balloon tires, and protective measures in order to make sure that the Hubba Bubble does not get stolen. We put in a protective bubble around the child's seat because we didn't want the child passenger to get hurt if the driver gets in an accident. The bubble surrounding the car seat is sound proof so the noise of the train or other noises don't disturb the child. We also added balloon tires on the bike so when Vanessa bikes over potholes she can ride as smoothly as possible. One of the protective measures we added was a folding aspect that lets the user use the bike itself as a lock. In order to enforce that it does not get stolen we also added a touch id to the bike so the user is the only one who can ride it.

VD (2017) "Labled Sketch"

Speed, Wheel Size, and Wheel Rotations

Vanessa lives 4 miles from her school and it takes her 22 minutes to got straight there. Using this information we can find the speed she bike in both mph and m/s. If 4/22 is equal to x/60 we have to multiply 4 by 60 to get 240. Then we use that number and divide it by 22 which gets us 10.9 mph. After this we can convert it into m/s by multiple 10.9 by 1609.34 (1 mile) which gets us 17541.806. Afterwards we divide by 3600 (1 hour) and get 4.87 m/s.

The radius of our wheel is 13 inches which makes the diameter 26 inches. We can use this information to figure out the circumference by multiplying the diameter by pi (3.14) which gets us 81.68 inches. Using both the circumference and the distance we can figure out the number of rotations her wheels make on the way to school. To do this we divide 4 miles (253440 in.) by 81.68 inches which gets us 3102.84 rotations.

Below are some of the calculations that are involved in making the ellipses included in the Geogrebra Bike Design. 

MJF (2017) "Geogabra Bike"

Energy

While using this bike Vanessa demonstrates both kinetic and potential energy. Since kinetic energy comes from movement, the speed she rides demonstrates it perfectly. Right before she first presses her foot down on the pedal, she demonstrates potential energy since no other energy has been released yet.

Scale/Gears

Another thing we looked at is the gears that would be used on the bike. Vanessa isn't looking for a fast bike so we know hat there should be a larger gear in the front and a smaller gear in the back. For the smaller gear we decided that it had to have 16 teeth, while the larger gear has 44 teeth.The scale we used on our bike and model was 1:13. This means that 1 inch on our model would be 13 inches on the final product.

VD  (2017) Hubba Bubble Journey

Reason to Believe

Our product is perfect for any Chicagoan that has to travel with a child and is concerned for their safety. The Hubba Bubble protects the child from both physical harm and loud noses so they are not disturbed. Our lock system keeps anyone from stealing the bike so the user can be worry free about being able o use it. While we talked o a couple of bikers about what they like about their bikes, one of them said "It is a simple bike and very comfortable. Because it is simple, very few things can go wrong." We took note of this and made a safe bike that can be used by anyone.

During this project me and my partner struggled with multiple issues. For example when we made a model of our bike, we noticed that the 3D printer had ended up detaching  the wheels from the frame of the bike. In order to fix this we had to use a glue gun and glue the wheels on to the frame. The biggest thing I took out of this action project is actually learning the process of making a bike. I thought this was cool because there are so many different bikes, and we were able to use our knowledge from this unit and put it all together in order to solve a common problem.