Why cars need a differential
Engineers (Advanced), mission M4 Steering & Differentials, lesson 1 of 6.
Hook
When a car turns, the outside wheel goes farther. So how can both be driven?
Fair test
Mark both back tyres. Drive a full circle. Count turns for inner and outer wheels.
Bonus challenge
Hold one wheel still and turn the input. Where does all the motion go?
The build
- 🔀 Differential Demo Cart: Push it round a corner and watch: the outside wheel spins faster than the inside one! (level 2 of 5, about 22 minutes, 10 steps)