If you’re a teacher, conceiving and designing a model car are great exercises in design thinking for students, particularly for the stages of ideation and prototype design. You can find a quick video on the stages of design thinking below. You can also find a complete lesson plan devoted to this topic, as well as instructional materials such as learning objectives, test materials, and evaluation rubrics here. While the focus of this project is mostly on the “how-to” of design, you can find a series of videos on using Sketchbook Pro to work out ideas before you design here.
Step 1: Download Autodesk 123D Design
Step 2: Create the Car Profile Sketches
After you have drawn a vertical line between the midpoints to close off the profile, select the sketch, and then select Mirror. Mirror the sketch about the vertical center line to create the end profile of your car.
Using the same workflow, create the sketch profile for the side of the car, the only difference being you will sketch the whole silhouette rather than mirror half of it. For a step-by-step video tutorial on this stage, see below.
Step 3: Model the Car Body
Next, extrude the side profile the full width of the car (100mm for this example). Be sure to use the Intersect option to create a the car body at the intersection of the two extrusions.
Give your car some personality by Applying material. Select all surfaces, choose a material, and apply. Be sure to use Modify > Fillet to smooth whatever sharp edges might remain on the car. For a step-by-step video tutorial on this stage, see below.
Step 4: Model the Wheel Openings and Scale Wheels
Next, use Sketch > Trim to remove extra lines, and extrude the profile the width of the wheel well (a cut of 20mm in this example). Use Modify > Fillet to round the edges around the wheel opening. Repeat this process for each wheel well. Save your car body.
Lastly, open a new file. Under Kits > Motorcycle > Components, select a wheel. Save the wheel To My Computer as name_wheel. Use the Measure tool to measure the radius of the wheel. Scale the wheel to a radius that will fit in your wheel well (15mm for this example). Apply black paint material to 3 faces on the outside of the wheel to create tires. Save the file. For a step-by-step video tutorial on this stage, see below.
Step 5: Add the Wheels
Repeat this process with each of the remaining wheels, making sure that they are level with each other and ultimately grouped. For a step-by-step video tutorial on this stage, see below.
Step 6: Print!
You will also need to download and install the latest version of the Makerware™ software from MakerBot. The software is free of charge and can be downloaded here.
Once a part has been created and is ready for printing you can select 3D Print option from the 123D Menu. This will bring up the 3D printer dialog where you can select your printer and options for printing.
After setting up your printer options, you will be given the choice to save as a .stl file or send directly to the Makerware software for printing.
If your printer is not listed in the Autodesk 3D Print Utility, you can still export to a .stl file directly. This will allow you to use any software your printer requires. This can be done by selecting the Export STL option from the 123D Design menu.
Lastly, if you don’t have a 3D printer, places like TechShop have the tools to turn your design files into physical objects, and staff the people who can show you how. Places like Shapeways can even print them for you.