OpenVelodrome

Hello! I run a project called OpenVelodrome. It's an online parametric velodrome design.
The current deals with the basic track geometry only. In the future this will be a complete velodrome design with downloadable CNC router files and build plans. Totally free and open source.

http://johanlagerloef.com/openvelodrome/

Check it out!

1 Attachment

Doesn't run on my Galaxy S3 but concept looks great. Hope to look properly sometime at a desktop pc.

this is great! is there a formula for these things?

i think at Manchester the exit from the bends is steeper than the entry, making the shape symmetrical "diagonally". am i right?

i've got a load of geeky questions - i'll hold fire for the moment though :)

so now i'm thinking this through. it's a developable/ruled surface.

WARNING - very geeky very quickly...

if i wanted to create a Mobius strip, i'd run a straight line round a circle and rotate it by pi in one revolution. the start and end would match up.

you could do the same for a bike track. sweep your 7.1 metre line from the start/finish line to the pursuit line only (half a track) and rotate up to 42 degrees max, and then back down again to your starting angle. to get the track steepness you want, where you want, you make the swept line rotation non-linear. the bend exits can be made slightly steeper than the entries with some probably quite ugly functions.

i like this a lot. thanks for posting.

Great work!

i think at Manchester the exit from the bends is steeper than the entry, making the shape symmetrical "diagonally". am i right?

Yes.

No problem with the geekieness!

if i wanted to create a Mobius strip, i'd run a straight line round a circle and rotate it by pi in one revolution. the start and end would match up.

Yep, not so sure I would like to ride that track though :-)

You are basically describing how OpenVelodrome works, with the swept line along a curvature. Did you find the Getting started link in the left menu? Right now the curve is mirrored and then mirrored again, I.E. no way to have different transitions for the entry/exit. It's a simple feature to add though, and i'll be sure to add it in the upcoming version. It just takes another set of transition parameters (d1,d2,d3,d4).

This is really valuable information for me. The way the geometry is calculated is based on theoretical physics and should be seen as a starting point for geeky discussions. What matters is how the finished track rides, not if it's theoretically correct.

Hi Johan, fantastic work - I'm very impressed with this :-)