HMTEF-100 racer Hail mary toymakers- A16   Jacob Groothuis, Ben Miller, Beverly Wesh, Lilly McCampbell EF 152 Spring, 2017 April 6th, 2017

Customer requirements & product selection Kids from ages 5 to 10 We chose a car because it’s a universally appealing toy, and we made it “built it yourself" so kids are able to change out the body style and see the inner workings of a car Other ideas we had: “Angry Birds” real life simulation game Brain teaser puzzle Solar powered car Beverly

Conceptual design Several choices and different routes we could take building the car: 3D print the wheels vs. buy wheels Solar power vs. propeller 3D print body vs. build out of wood We chose to 3D print the body and laser cut the wheels to give us more accuracy when designing We also chose to use a propeller to eliminate some of the electrical work that comes with using a solar panel Jacob

Actual design 3D printed body of car Top picture is dragster design Bottom picture is base Bottom and top connected with pegs in holes Propeller attached to motor set out of hole in the back of the base and then to 9 volt battery Axels attached with hot glue Laser cut wheels Ben

Marketing video

Customer feedback and results Prototype showed to two boys, ages 6 and 8 Interested about the idea that you could change the body style Wanted multiple cars to be sturdy enough to be rough with Brought up the idea of adding on “fast packs” which would essentially be more powerful motors to make the cars go faster Lilly

Cost and time estimate Prototyping costs: $13.79 Axels: $1.55 Propeller: $0.44 Motor: $1.93 3D printing cost: $3.20 Battery terminal: $0.44 Velcro: $1.24 Toggle Switch: $4.99 Batteries not included Cost per 1000 units: $8,990 Buying in bulk, decrease price by 35% Retail price: $29.99 Design time: 19.25 hours Data from Project Notebook Beverly

CONCLUSION The biggest obstacle we had to overcome was the time constraint of 3D printing Our design is simple but because we tried to print 4 wheels and the body it was difficult to build quickly while waiting for the parts to finish We stand by the quality of our product and believe it will be successful in the market because of the versatility and simplicity of the design If we were to redesign the product, we would make the entire car wooden and not 3D print the body