The design phase is an important part of the engineering design process. Once you have defined your design requirements, you need to start designing your car. See the Engineering Challenge section for more details. While the 2015 challenge is over, you can still follow the rules and compare your car to the high scores. You can follow the rules from the 2015 Engineering Challenge, which has strict rules about how you can build your car and what it must accomplish.See Sensor App section of the procedure for more details. You can measure your car's velocity using a mobile phone equipped with a sensor app.You can build a balloon car using any materials that you want.There are several different options for the project: The car should be sturdy and not fall apart when in use.You can come up with your own design requirements, but here are some suggestions: Since this is an engineering project, you need to specify your design requirements. Balloon-powered means the car is propelled forward by nothing other than air escaping from a balloon. The goal of this project is to design and build a balloon-powered car. You can learn more about the engineering design process Your teacher whether it's acceptable to follow the engineering design process for Process, as opposed to the scientific method. Note: This engineering project is best described by the engineering design Google Play for Android devices (version 4.0 or newer) or from the App Store for iOS devices (iOS 9.0 or newer). Optional: Smartphone with a sensor app such as phyphox, available for free on.Optional: Digital camera or smartphone to document your design process.Cutting tools like scissors and a hobby knife.Construction materials to hold things together, such as glue, tape, binder clips, paper clips, and rubber bands.Plastic drinking straws, used to connect the axles to the car's body, and to attach the balloon to the car.Material to connect the wheels to the axles, like a dry sponge or modeling clay.Axles, such as wooden pencils or skewers.Round objects for wheels, like CDs, bottle caps, or empty rolls of tape.Something to form the "body" of the car, such as a plastic bottle, plastic cup, piece of Styrofoam®, cardboard box, or piece of corrugated cardboard.Many different materials will work, but here are some suggestions: If you just want to build a car for fun, or for a science fair project, you can pick which materials you want to use. Scissors (allowed as a tool only, not a construction material).Note that these are also referred to as "milkshake straws" or "smoothie straws." They are available from.Jumbo straws, approximately 1/2 inch diameter and 9 inches long (2).The maximum allowable quantity for each item is listed in parenthesis. You can only use the materials listed here. If you want to challenge yourself and compare your car's performance to other students' cars, you can follow the guidelines in the What are some common materials and designs used to build balloon cars?.What are some different ways potential energy can be stored?.For the ultimate test, you can follow a strict set of design rules used in the 2015 Engineering Challenge (see the Procedure for details). You want to design your car so it can travel as far as possible. However, when you attach the balloon to a car, like the ones shown in Figure 1, you can harness the balloon's energy to propel the car forward! The engineering goal in this project will be to design, build, and test a car that is powered by nothing but a balloon. When you just let a balloon go on its own, it tends to randomly fly around the room, and is almost impossible to steer. According to Newton's third law of motion, when air is pushed backwards out of the balloon (out the end with the opening), there must be an equal and opposite reaction force that pushes the balloon forward (the end opposite the opening).
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