What is Raised Front Wheel Design?

[kcbigfan]

Hey Everyone,

It is getting that time for building a PWD Car. I need your help on answering these questions? If you have a link please post it.

What is a Raised Front Wheel Design? What are it's advantages?

What is a Rear Canted Installed Wheels? What are it's advantages?

[cycrunner]

Since it nearly impossible to have 4 wheels touch the ground and you never know which 3 will be in contact, it has been found that by intentionally raising one of the front wheels it follows that the rear two will always be in uniform contact with the track, and then you have one dominant wheel (the front) to use to control the drift or steering of the car. This leads to rail riding which means you install that wheel so that it moves the car to the right if the wheel is on the left thus that wheel rubs against the rail and makes the car run as straight as possible. Ideally we would like to have no wheels touch the rail but with all the variables in play this can't really be done. To minimize friction it is best to use what is called positive cant on the dominant front wheel. This is where the wheel is tilted so that the lower inner rim of the wheel touches the junction of the rail and track while the upper rim is thus tilted out and away from the rail.
Negative canting of the rear wheels is just the opposite- this keeps only the very inner edge of the flat tread of the wheel in contact with the track which minimizes friction and keeps the wheel out and away from the car body. The wheel will rub on the inner portion of the axel head which you must prepare carefully to eliminate any ridges, etc. and polish to minimize friction. The rear wheels must be mounted perfectly straight fore and aft for best performance. Hope this helps.