✓Lesson Snapshot
Student Objective
I can explain how sprockets and chains transfer motion and calculate a simple drive ratio.
Main Activity
Build or inspect a VEX chain drive, compare it to gears, and calculate how sprocket size affects output behavior.
Deliverable
Sprocket drive comparison chart
Tools / Materials
VEX sprockets, chain, shafts, structure pieces, notebook, calculator
1ProblemUnderstand the challenge and why it matters.
Sometimes power must be transferred between shafts that are too far apart for gears to mesh directly. Chain drives can move rotational power across distance while keeping a controlled ratio.
2ConceptLearn the engineering idea or skill.
A chain and sprocket system transfers rotational motion using linked chain wrapped around toothed wheels. Sprocket ratio affects speed and torque in a way similar to gear ratio.
3ApplyUse the skill in a guided task.
Assemble or analyze a chain drive. Identify the driver and driven sprockets, calculate the drive ratio, and compare the system to a gear train performing the same task.
4DocumentRecord your evidence and decisions.
Create a comparison chart showing gears versus sprockets for spacing, alignment, speed/torque tradeoff, and possible aerospace ground-support uses.
5ReviewCheck quality and identify your next step.
A strong comparison explains why the spacing between shafts, alignment needs, and maintenance concerns may influence the design choice.
Lesson Resources
Use these files and shared website resources when they support today’s work.
Engineering Graph Paper
Use for sketches, layouts, calculations, systems diagrams, and test planning.
Open ResourceEngineering Resource Library
Templates, reference sheets, sketch paper, and course support files.
Open Resource