It will pull 3 people before it begins to have a hard time. Sadly we have not been able to find its builder.
The track pictured is PVLS in Southwick, MA.
Here is a video! https://www.youtube.com/watch?v=cL1JA7q8w1I&frags=pl%2Cwn
A great video. Thanks for the link. I subscribed to your channel. A link to my channel is in the taglie below.