humble pie rat
Join Date: Nov 2006
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If it is a spinnaker staysail, I've only remember seeing one once. I crewed on a C&C 35 and we used it in one race. It's a triangular sail flown inside the spinnaker in light air.
I could be way off base but I think it's used to improve the air flow around the forward part of the mainsail, keep the airflow from separating from the mainsail and reduce turbulence.
My advice, fwiw, would be to contact the sail manufacturer, tell them what you have and ask them how it's supposed to be used.
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