THE JUNGADA 

The magnificent Juganda sail has been used by fishermen on the northeast of Brazil for many centuries.

To my knowledge, no one has ever tested the Jungada sail.

A study of airplane wings prove that, in a form, close to that of Jungada, the aerodynamic resistance is inferior to 8,8% to the « elliptic »form (as of the famous Spitfire fighter plane).

Another study by C. A. Marchaj shows that an elliptic sail is about 30% superior to the Bermudan sail. This can get you hoping that the Juganda sail will be more than 30% superior to that of the Bermudan.

C. A. Marchaj classes the Juganda sail in the same family of forms as the Crab Claws.

These forms are characterized by the luff long and convex, and the leech shorter and concave.

The proportions of the Europeans sails are exactly the opposite.

                         Sail Performance-C.A.Marchaj

The similarities between the forms of exotic sails and the forms of fish’s fins, sea mammals and birds ( penguins... ) are obvious.

If animals, as different as fish, mammals and birds are equipped with the same type of propulsion and steering devices, it’s not just a case of industrial spying or pure chance: Nature selected  this form and not another, simply because it suits the sea animals better, speed being a matter of life and death.

Actually, nature’s model is used practically only by sailboards, which almost certainly contributes to it’s unbeatable knots / dollars relation.

UP!