470 Tuning Information

Gold Medal Winning Rig - Cumulus Section wins Gold, Silver & Bronze in Athens.

Sofia Bekatoura, Olympic Gold medalists, 470 (w) "...the 2004 taper developed by Seldén gave us a definite speed edge, we could work the rig harder to be faster through the water..."

Update - Cumulus

In late 2003, Seldén developed a new custom taper on their highly successful Cumulus section that increased tube stiffness in the lower 1m of the taper. This allowed the rig to be ’worked’ harder in the 9-13knot wind range (when the yellow flag was flown). Fully tested by the Greek men and women’s team in early 2004, the rig was an instant success.

Fully fitted with all the new design fittings from Seldén, the rig was deemed clearly to be faster than anything around and went on to win three medals in the Olympics.

The taper is now the standard package for 2005.

Boom Section

Olympus is the only boom section designed specifically for 470 class rules making it the stiffest 470 boom available for maximum rig control. Boom slides allow direct attachment of mainsheet blocks so that the boom can be easily centrelined in medium conditions.

Spinnaker Pole

Drawn tube is used for our 42mm extra stiff spinnaker pole tube. Using drawn tube enables wall thickness can be significantly reduced to give the stiffest, lightest spinnaker pole possible.

Results

Gold Medal (w) - Beijing Olympics 2008

Gold Medal (w) - Athens Olympics 2004

Silver Medal (w) - Athens Olympics 2004

Bronze Medal (m) - Athens Olympics 2004

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

Mast Specification - Cumulus , Epsilon

Cumulus mast has tenon plug with ball sheaves at base, cleat for spectra main halyard (2:1), NEW thumbscrew spreader adjustment.

Standard Epsilon mast is supplied with 3 sheave heel plug, hook rack for wire main halyard, ball bearing sheaves for pole lift and spinnaker halyard, and fully adjustable (length and angle) spreaders.

Boom Specification - Olympus

Boom is complete with inboard and outboard ends with ball sheaves, plus three boom slides.

Spinnaker Pole Specification

42mm tapered pole supplied complete with eye, featuring the new Seldén pole end.

Rigging Specification

Standard rigging pack includes wire main halyard, kevlar pole uphaul with hook, heavy duty wire jib halyard and low stretch 1x7 construction shrouds with swaged lower eyes.

Cumulus rig pack has 2:1 jib halyard; 2:1 Spectra main halyard, Spectra pole role & S/S hook, dyform shrouds & trapeze adjusters are also included.

Tuning Tips

* Spreader deflections are approximate, prebend settings are the critical setting.
** Boom needs to be inside vertical line of leeward quarter, ease kicker until
this is achieved.