Junk rigs, the same as any other sail, have developed over the years. From the flat panel sails that were the usual in the days of Hasler and McLeod who wrote the definitive book on junk rig, to the likes of Thompson and Kvearner who have "invented" the "shelf shaped system" cambered panel sails with rigid battens, there has been much progress. So much so that their sails are very close to performing as well as a bermudian sloop upwind, and considerably better reaching and running.
Junk rigs, the same as any other sail, have developed over the years. From the flat panel sails that were the usual in the days of Hasler and McLeod who wrote the definitive book on junk rig, to the likes of Thompson and Kvearner who have "invented" the "shelf shaped system" cambered panel sails with rigid battens, there has been much progress. So much so that their sails are very close to performing as well as a bermudian sloop upwind, and considerably better reaching and running.
Fully battened sails are awesome...of course they do! Sailing close to the wind has more to do with the skill of the sailor~ _/)