Reply To: When were studding sails set?
Harland is essential reading for anyone studying the age of sail.
As noted above Stunsails (or Studding sails) are only set in relatively fair weather, and no closer to the wind than a broad reach. Artists such as Spurling loved to show clippers with everything set in quite heavy weather, but that is classic artistic licence. Dead downwind is a poor point of sailing for any square rigger (far better to tack downwind keeping wind on quarter), and stunsails only make this worse.
Quite a few modern sail training ships now sport stunsails, notably the barque Europa and the full-rigger Stad Amsterdam. See http://tallshipstock.com/ for good shots of both under sail.