Originally Posted by
RedBullFiXX
Go
HERE for tons of info about 12th scale building, setup and such.
One of the many links on that page is to gearchart.com, the ultimate tool for rollout calculation.
That's a good size track, for 13.5 no boost, you might want to start at around 90+mm roll.
72T to 78t spurs should be good for what you are doing.
Lots of info in how to calculate rollout but how is the rollout determined. In other words how do you know that your track requires a specific rollout for the intended motor? Is there a method to figure this or is ths just an empirical number?
In all my years of RC racing, gearing has always been "socially engineered" at the track.
However, it would be nice to know how to determine it on my own.
