"Tall Boy" vs. small Genoa
Both these sails are for increasing flow through the foredeck "slot". The Tallboy is for setting with the spinnaker. The Genoa staysail is self-evident. The tacks of these sails may need to be moved around on different points of sail or windspeeds in order to find the most effective spot to fly them. Sail magazine''s book of sail trim has some good pointers on using sails like these. We set a tallboy once and went nuts getting it to work right. We hoisted it, sheeted it in, and dropped a quarter knot below base speed. We eased the sheet in order to drop it, and picked up a quarter knot over base speed. We dropped the tallboy and lost half a knot. We ended up leaving it up, luffing for half it''s length, because that was the fastest way to have it. Wierd.