I want to build a mathematically perfect mountainboard track. It would include all the knowledge we’ve gained from thinking about how tracks should be built.
It would use a clinometer to ensure the track always runs at a constant angle, the rollers would be built using a sine wave with a 7:1 ratio, and the berms would be laid out using constant curves and radii.
All I need is a hill and the time.
Today’s work on berms.
Finding the centre of existing berms using two dissected chords.
What is the best radius for a berm? Somewhere between two and three times the width of the track.
Laying out the out-track to make use of the tangent line the rider will be following as they leave the berm.
Euler Curve for the cross-section of the berm, giving a 5m wide track a riding width of approx 5.6m in the berm.
Just need to get it all into some kind of easy to follow instructions.
I’ve been thinking more about writing track building guidelines, and although they need to be quite detailed, I think they also need to have simple takeaway ideas that are easier for people to get their head around and make it more likely that the guidelines will get adopted.
These could be things like: