Static 4 point bend tests of sun-conditioned PVC BYRC rails

CZcams turned off all my comments, and won't respond to requests to find out why. You could send them feedback if you object.
I wanted to publish this work I did in 2017 while I was working with some MIT students on a potential Rush Week student-build roller coaster. While fracture toughness is the critical issue, I performed six static bend test on 27 month sun-UV exposed formed PVC electrical conduit pipes.
Basically there was no drop in strength or stiffness. The real issue with PVC is fracture toughness, which is strength on impact, and I will document my 2017 drop fracture toughness testing in another video.
backyardrollercoasters.org/