Hey PD's,
With the dimensions supplied by Gordon and the diagram on the ripnet site, you might just be able to make a good representation of Knapp's Roller Boat. You could also go to your local kitchen supply store and purchase an already complete replica of the vessel; Just purchase a roller pin, remove the handles, and bevel the ends, Viola! Knapp's Roller Boat.
Have you ever gone to an amusement park and walked through the spinning tunnel? I can only imagine that the sensation would have been the same where the only view would have been through the narrow opening at the ends.
I can't see any visible means of steering the vessel. Has anyone any ideas as to how this was accomplished? Was she split at the center and each half operated independently?
Randy