Why do tanks and diggers use tracks instead of wheels?
Tracks spread the weight and grip rough ground. A track is a loop of links that the vehicle lays down in front of itself. It touches the ground over a long strip, so it does not sink into sand and it can climb bumps. Tanks steer by running one track faster than the other!
Try RC Tank for freeComplete MightyCog booklet collection: 82 PDF booklets for $12.99. Instructions only; individual booklets remain free.
Explore the printable packTry it yourself
Drive your tank over a book. Now try a car. Which climbs better?
Build it: 3 builds that teach tracks
- 🪖 RC Tank: Two motors, two tracks, one remote. Spin on the spot and climb over anything! (level 4 of 5, about 60 minutes, 27 steps)
- 📦 Conveyor Belt: A factory belt that carries your parts from one end to the other — and drops them in a box. (level 3 of 5, about 50 minutes, 22 steps)
- 🚧 Twin-Motor Dozer: Wide caterpillar tracks, one motor per track, and a blade that cranks up with a worm gear. (level 5 of 5, about 100 minutes, 33 steps)
In the classroom
- I9 Signals & Remote Control (Inventors, Intermediate)
- M9 Factory Automation (Engineers, Advanced)
- M10 Capstone: Rescue Rover (Engineers, Advanced)
Common engineering questions
How can I try tracks at home?
Drive your tank over a book. Now try a car. Which climbs better?
Which builds teach tracks?
3 MightyCog builds teach it: RC Tank, Conveyor Belt and Twin-Motor Dozer. Start with RC Tank: 27 steps, about 60 minutes.