Facnor has developed an option to be able to adjust the tack of the assymmetric
Spinnaker fitted with an Asym-Fx Friction Block.
The Asym-FX Friction Block by Facnor allows the enlargement of the belly
of the sail and to forward the sail further downwind.
The function of the Facnor Asym-FX Friction block is to give you the 2:1 purchase
tackline you need to increase tension on the torsion line and prevent any
future twists when using your Facnor Asym-FX Furler.