What is rail riding?
If a pinewood derby car is aligned to run straight, but the track is not consistently level (very common), the car will contact the center guide rail both with the left wheels and the right wheels. it will basically wobble back and forth all the way down the track. robbing you of all your speed. If a raised wheel is used, then the raised wheel will likely contact the guide rail and start spinning. This will cancel any benefit attained from the raised wheel.
Derby Worx came up with the idea of riding the center rail. Riding the center rail keeps only one wheel touching the track and keeps a consistent travel down the track. If you are not moving back and forth, then you must be moving forward! Faster!
To compensate for the unknown condition of the track, the car can be intentionally steered such that the raised wheel does not contact the guide rail. For this discussion, we will assume that the left-front wheel is raised (if the right-front wheel is raised, then everything discussed below is reversed).
Adjust the right-front wheel so that the car drifts to the left – this keeps the left-front wheel from contacting the guide rail. With this drift, and if the rear wheels are aligned to run straight, then only the right-front wheel will contact the guide rail. To ensure that the right-rear wheel stays off the rail, the right-front of the car can be narrowed by 1/16 inch.
Tests show that when this Rail-rider technique is implemented, car performance is consistently faster than straight alignment.
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Your choice of polish level depending on your desire. Our technique is perfected and you can see the results. Quality and Repeatability time after time.
Two axles are bent at 2.5 deg (for rear wheels), one axle is bent at 1.5 deg (for front dominant wheel), and one axle is straight (for raised wheel).