Yep
"The effects of varying tack position for the small non-overlapping staysail and its cut-down variant (Ssmall-nol and Ssmall-NOL-)- These are the smallest staysails tested in this study yet they produce the largest increases in driving force at deep apparent wind angles, up to a 17% increase at 90" AWA. This is due to the sail's improved flow over the mainsail and through the slot. It was actually found to be beneficial to leave a small gap between the leech of the staysail and the mast, as the accelerated flow through this gap seemed to be the driver for re-attaching the flow on the leeward side of the mainsail."
This is describing a small non overlapping cut down staysail tacked to windward is most effective at the deepest angles...
From what I can tell from WW's photos. In light air they are carrying it on CL and as the breeze increases they are tacking it out to weather...
"The effects of varying tack position for the small non-overlapping staysail and its cut-down variant (Ssmall-nol and Ssmall-NOL-)- These are the smallest staysails tested in this study yet they produce the largest increases in driving force at deep apparent wind angles, up to a 17% increase at 90" AWA. This is due to the sail's improved flow over the mainsail and through the slot. It was actually found to be beneficial to leave a small gap between the leech of the staysail and the mast, as the accelerated flow through this gap seemed to be the driver for re-attaching the flow on the leeward side of the mainsail."
This is describing a small non overlapping cut down staysail tacked to windward is most effective at the deepest angles...
From what I can tell from WW's photos. In light air they are carrying it on CL and as the breeze increases they are tacking it out to weather...
