Kool sailboat or sled!

We had one of these we called it the Kooler. We used it as a sled in the winter when the kids were little. Hooked it up to the back of the tractor and pulled it around the field. The snow would squirt up out of the centerboard slot so I had to stop and bail it out once in a while because the kids would either fall out when it filled up or just get covered up.
I don't know what the name for that kind of rigging is but I like it. We we had ours with a Lateen rigging on it but I think it would sail just as fast like this.