Differentials are used mainly in cars as a part of the transmission mechanism. This mechanism allows the car to make turns without the wheels skidding, prevents wheel-slip, reduces tyre wear, and makes entering and going out of turns easier for the driver. Essentially the Differential allows drive wheels sitting on the same axle to rotate at different rates and cover different distances over the same time interval.
This construction kit has a number of wooden sheets with pre-cut parts that can just be pushed out from the sheet. Assembly requires no glue or additional tools. There is a full colour manual that gives step by step instructions.
Having assembled the Differential, you can unblock it pushing the lever in position 1 (Up) and set both wheels in motion by rotation of the drive gear or the wheel. The Control lever regulates the smooth locking of the left and right wheels independently by turning left or right respectively. In the "down” position of the lever, both wheels are linked in a rigid coupling and can either rotate together (propelled by the drive gear or a wheel) or lock simultaneously.
There are 163 pieces in the kit, and the estimated time to construct it is 1 - 2 hours.
The finished model is 17.5 x 13.5 x 10.5 cm.