My second backyard roller coaster, with a "3-dimensional" track. BYRC-3D-02

Link to youtube video:
https://www.youtube.com/watch?v=hnpT2OsGr6M

Check out my other videos on my youtube channel.  

I retired from Boeing in February, and decided a few weeks ago to try designing and building a backyard roller coaster for my grandkids.
Here is a video.