Devon Yawl Tuning Information

Update

Seldén spars are soon becoming established as the fastest Yawl spars available. The Seldén Cirrus section was specifically designed for the large dinghy classes and has with a long unsupported tapered topmast - its unique bend characteristics enable power and sail shape to be accurately controlled using deck level, rig tension and kicker control to suit the range of crew weights and wind strengths.

Seldén benefited from the input of Mike Roberts, established Devon Yawl tuning expert, which enabled the rig to be further refined.

Seldén 2633 Boom section has the unique strength for weight characteristics necessary to achieve absolute mainsheet and kicker control and our boom slides allow direct attachment of kicker and mainsheet blocks.

Results

Why Seldén?

Choose a Seldén mast and you will find many performance enhancing features unique to our products, for example:

  • The Seldén tapering system ensures that our tapers are minimum size and weight. This gives low windage, centre of gravity and topmast weight. This maximises your speed by enabling the topmast to react quickly to gusts and waves giving better acceleration, a smoother ride upwind and, ultimately, more races won!
  • Automated welding keeps excess heat out of the taper for guaranteed consistency and performance. The weld produced is so perfect that there is no need to mechanically grind the weld (which can induce inconsistencies). This means that once we have finalised a winning design, you can be sure that your spar will perform identically to the champions.
  • All masts are heat treated in our purpose-designed oven. This artificial hardening ensures that you get maximum performance from the high performance aluminium alloy.
  • Our spars pass through a purpose-developed bead-peening machine. This gives the mast a perfect satin finish that dramatically improves fatigue properties, giving you a mast that will perform reliably for many years.
  • Top quality fittings such as our fully adjustable spreader bracket and highly durable cast gooseneck ensure speed and reliability on the racecourse.

Sections Available

Main Mast Cirrus
Main Boom 2633
Mizzen Mast Lambda
Mizzen Boom 2520

Standard spec. includes tenon heel plug, jib, stick eyes, spreaders adjustable for angle and length and lower sleeve.

Main and Mizzen Boom Specification - 2633, 2520

Boom comes complete with inboard and outboard end with sheaves and mainsheet and kicker eyes.

Spinnaker Pole Specification

Rigging Specification

Includes 4.5mm Kevlar main halyard, wire to rope jib halyard, 3mm 1 x 19 st/st wire shrouds and forestay with swage lower ends.

Tuning Tips

Mast Heel 3485mm from aft face of transom
Spreader Length 416mm (side of mast to shroud)
Spreader Deflection 140mm (aft edge of mast to straight line between shrouds)
Mast Rake 7650mm (with rig tension on, from top black band to transom)
Rig Tension 190kg (measured on shroud)
Pre-Bend 25mm (measured at spreader height)

 

 

 

 

 

 

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