An interesting test car that the CN had. RailPictures.Net Photo: CN 87989 Canadian National Railway Boxcar at Temple, Texas by Steve Patterson
From the RailPictures description:
To show switching crews as well as shippers and customers how damaging coupling impacts at higher speeds can be, Canadian National rebuilt a 40-ft. box car with plexiglass and equipped with a big needle meter to show speed at impact. One could also observe shifting of the load inside.
And some other pictures
Who’s gonna model this?