I found a site dedicated to this and was so enchanted by some of the pictures i could not resist re-blogging here in a brief impromtu post.
The original pictures are all from http://saveirodabahia.blogspot.com/
This is the type called “Bateira” from the states of Ceará and Rio Grande do Norte.
Note that the planform on the mainsail is just about the theoretical optimum as described here.
The following images are all of the Bahian saveiro Vendaval, which measures 14 metres LOA and built in 1947. The mainsail area is 98 M². There is no purchase on the sheet. Saveiros use a single balanced halyard. Obviously there is no auxiliary.
From afar. This is not a typical amount of crew. They are on an outing here.
Mestre Nute directing operations aboard his ship.