Snow White by Jaeho Jung and Sariel's The Unofficial LEGO Technic Builder's Guide. The PF car is modular in design and it is basically divided into 3 main modules:
- The drive module
- The chassis
- The steering mechanism
|1 : 2.25 ratio from motor to intermediate axle|
|1 : 1.66 ratio from intermediate ratio to wheel axle, giving a final ratio of around 1 : 3.75|
The steering mechanism is a little more interesting here, one of the biggest problem with the PF medium motor + rack and pinion setup is the inability of the mechanism to return the steering to the centre after turning to the right of left. So I incorporated a self-centering mechanism found in Sariel's book to see how well it works & I was surprised by the results - it worked really really well.
|Self-centering steering mechanism from Sariel's book|
|A drive module with differential, with an overall ratio of 1 : 2.78|
|The underside of the chassis|
- 1 power functions XL motor.
- 1 power functions medium motor.
- 1 power functions receiver.
- 1 power functions battery pack.
- 1 power functions remote control.
And for anyone who wants to improve their construction technique in LEGO Technic/Mindstorms, I would strongly recommend grabbing a copy of Sariel's The Unofficial LEGO Technic Builder's Guide.