Update - Custom RigThe Seldén Kappa section was specifically designed for the 420 Class and continues to be the ideal section for the boat for the following reasons: - Lightest weight mast.
- Performs like a ‘stiff’ mast with correct spreader and chock settings.
- Will de-power with rig controls (the only DYNAMIC 420 mast on the market) .
- Reduced drag due to small section size.
The Kappa mast has been the most success 420 mast ever, winning for National, European and World titles than any other mast section. 2628 BoomSeldén’s 2628 boom is ideal for the 420 being both light and stiff, although some of the heavier crews have chosen our 470 boom section, the Olympus, which is even stiffer allowing absolute mainsheet and kicker control. The Seldén jib Purchase System utilises our low friction high load blocks for ‘fingertip’ rig control.
Results
1st European Championships 2004 1st British Championships 2004 1st British Youth Championships 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
Our Kappa specification includes NEW four sheave heel plug and pole downhaul fairlead to lead line into mast at deck level in addition to normal Selden features such as ball bearing spinnaker sheave and fully adjustable spreader angle and length. Mast comes complete with cleat for kevlar main halyard and drawlines to facilitate rapid attachment of halyards.
Boom Specification
- 2628
, Olympus
Boom is supplied complete with inboard and outboard ends with sheaves, plus three boom slides and outhaul.
Spinnaker Pole Specification
Standard pole is super light 38mm tapered pole, supplied complete with wide based uphaul eye.
Rigging Specification
Includes kevlar main halyard and pole uphaul, pole uphaul hook, dyeform shrouds with swage eyes at bottom & T-wires.
Tuning Tips
| | Crew in Boat | Semi-trapezing | Full trapezing | Overpowered | Very
Overpowered |
|---|
| Wind Speed (knots) | 5-8 | 9-11 | 12-15 | 16-20 | 20+ | Mast Foot Position
(from c/b bolt)
| 430mm | 430mm | 430mm | 430mm | 430mm | Spreader deflection
to aft side mast
Spreader L = 485 mm) | 135mm | 135mm | 135mm | 135mm | 135mm | | Mast rake | 6070mm | 6070mm | 6032mm | 5994mm | 5994mm | | Rig tension (Loos, on shroud) | 38 | 38 | 39 | 39 | 39 | | Pre bend, natural (no chocks) | 32mm | 32mm | 39mm | 46mm | 46mm | | Chocks (15mm), from neutral | -1 to neutral | neutral to +1 | neutral to +1 | neutral | -1 | | Bridles | long | normal | normal | normal | normal | | Centreboard | full down | full down | 15° up | 20° up | 25° up | | Barberhaul Yes/No | Y (over pole eye) | Y (normal) | Y (normal) | Y-N | N | | Kicker | loose | take up slack | yes | lots | lots | | Cunningham | no | no | N-Y | Y | lots | | Outhaul | hard (15mm ease in
special conds)
| hard (15mm ease in
special conds) | hard | hard | hard |
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