[Traduction du commentaire original en Anglais]
Not only was the piff paff used on this wing invented by Jean Louis Darlet as noted by Bart above - but the whole wing was designed by him when he was working for La Mouette.
His concept with the separation of the wing halves was to overcome the roll limitations that persist to this day. While the billow shift mechanism does improve roll control, the inertia of the unloaded side delays upward billow.
Darlet sought to improve roll response by separating the wing halves and reconnecting with a rubber bunge to allow the laoded wing half to billow up independently to the unloaded side.
Darlet claimed the roll response was consideribly improved with this concept such that the wing could be safely towed free from fear of lateral lock outs. Pilots were apparently less enthusiastic (and possibly not prepared for such positive and light control inducing PIOs) and the wing was modified by La Mouette, firstly with the LE to kingpost junction reconnected so only the rear half of the wing was separted, then finally the entire wing was rejoined.
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