Mast sections C-sections and F-sections Loads generated by the crew (mainsheet, vang, outhaul, Cunning­ am etc.) are transferred to h the mainsail and on to the mast. As the mainsail is designed according to the expected curve of the mast, a longitudinally stiff mast allows for less luff curve of the sail. Instead, this sail area can be added to the roach of the sail, where it is subjected to the wind and more efficient. The longitudinal rigidity of the mast section makes for higher forestay load created by tensioning the backstay. Running backstays can often be avoided. The risk of mast pumping is also reduced. Sail groove for bolt rope* * If a traditional bolt rope is to be used, a plastic profile (Art. No. 535-710), as well as a sail feed (505-526-01) must be added to the luff-groove on the mast. ** For more detailed information on Seldén’s furling masts, see pages 96–111 or “Sailmakers’ Guide” (www.seldenmast.com).

Mast section measurements are given as follows: Major diameter/Minor diameter (i.e. 211/110). This will help identification and the use of correct measurements. The major diameter of the mast can usually be found in the number engraved at the mast heel. For example K23-C211-4475. Measurement points Space for luff tape Luff groove Furling mast luff extrusion Weight A kg/m mm Big luff curve. Less roach. Stiff mast. Bigger roach for more projected area.

Mast sections E-sections, D-sections and R-sections Our older types of mast sections are no longer in production. But we stock a range of spare parts and accessories for these masts. Please note that the mast section is always the key for correctly identifying the parts you are looking for. Luff groove Space for luff tape Mast section measurements are given as follows: Major diameter/Minor diameter (i.e. 170/115). Take note of the mast shape. This will help identification and the use of correct measurements. The major diameter of the mast can usually be found in the number engraved at the mast...