Lesson 3: Technical Sketching & Prototyping
Duration of Days: 3.5
Lesson Objective
SWBAT:
Create a 1:1 scale cardboard template for a vehicle component.
Identify "interference" issues where two parts of the vehicle might hit each other during operation.
How can a cheap cardboard model save us hundreds of dollars in ruined aluminum?
What is the difference between a "Low-Fidelity" mock-up and a "High-Fidelity" prototype?
Prototype, Mock-up, Scale, Interference, Fidelity, Iteration.
CT-CTE.EDP.A.03 (Develop a prototype); CT-CTE.MFG.B.09 (Geometric construction).
DOK Level: 3 (Strategic Thinking / Hands-on)
Students move from ideas to scale models. The purpose is to use low-cost materials (cardboard, foam, 3D prints) to test "fit and function" before cutting expensive metal.
Misconception: "The prototype should look like the final part."
Correction: It only needs to test a specific function.
Support: Provide pre-cut geometric shapes for assembly.
Extension: Use 3D printing for complex joint prototyping.
Physical placement of the prototype on the chassis to prove clearance of wheels and driver.