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Furling from the Tack first
Furlers furl a sail in a direction perpendicular to the forstay. As the sail furls the Luff length decreases. In order to furl a sail starting from the Tack the following is necessary:
- A foil
- A free spinning tack and head
- No luff grove, instead the Luff is attached around the foil with soft hanks.
The amount of sail furled at the clew relative to the head would be dependent on the tension in the halyard. Imagine the Luff being only present and represented by a rope. As the Tack is furled the Luff rope wraps around the foil.
Has any of the manufactures got anything like that working. The reason I ask is that it would be possible to furl and maintain Luff length. Thus it would be possible to turn a 130% Genoa into a properly sized 100% genoa. Also, as the tack is furled first the Clew is lowered which is desireable; ie. a high Clew Genoa ends being a low clewed jib.
I can see the engineering difficulties but it seems that it may be possible.
I know the difficulties associated with camber etc.. but this is not what's beign asked.