Sandhopper Tuning Information

Update

Unique features of a Seldén Sandhopper mast include:

Manufactured from 3525 section: - specifically developed for maximum performance for the Sandhopper class.
Bead peened finish: - our purpose built bead peening machine cuts out inconsistencies due to traditional hand abrading cleaning techniques, greatly improves fatigue properties of the alloy, and gives a superb consistent matt satin finish.
New layout: - developed in consultation with Parker Yachts the established Sandhopper builder.
Top quality fittings include super-strong investment cast stainless gooseneck, free swinging adjustable length spreaders and “ertalyte” self-lubricating hard wearing sheaves throughout.

The mast is complemented by the 2632 boom section, which has the unique strength for weight characteristics necessary to achieve absolute mainsheet and kicker control. Boom features include:

Inboard and outboard boom end including ball sheave for outhaul.
Unique boom slides, which allow direct attachment of mainsheet blocks for efficient centrelining in light winds.
Choice of outhaul led into boat or cleat on boom.
Spinnaker pole is tapered from our 42mm drawn tubing guaranteeing minimum weight for maximum stiffness.

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

Mast Specification

Parker spec mast has a sheaveless heel plug, ball sheaves for pole lift and spinnaker halyard, slots for jib and spinnaker halyard exits with aft facing sheave boxes for main and pole lift exits. Draw lines are fitted for rapid attachment of halyards.

Boom Specification

Boom has inboard and outboard ends with sheaves, and three boom slides. Pole launcher spec has outhaul plus shockchord system for pole retraction.

Spinnaker Pole Specification

Rigging Specification

1 * 7 construction shrouds for ultra low stretch include rigging screws.
Forestay and lowers have swage eyes at the lower end compatible with standard vernier adjusters.
Main halyard is low stretch Kevlar KT3
Jib halyard 3.4mm low stretch 7 * 19 construction stainless
Pole lift and spinnaker halyard 8 plait pre-stretched.