BOOMS

BOOMS WITH A STRONG PROFILE

BOOMS WITH A STRONG PROFILE

Seldén booms have a wealth of sophisticated features and can be equipped with a variety of reefing systems to suit different boats and the needs of different sailors. The booms can be fitted for traditional slab reefing or Single Line Reef, or be used for furling masts. The boom extrusions are relatively deep in relation to their width, allowing a lighter extrusion with high resistance to vertical bending. This makes them perfect for use with modern, stiff sailcloth and efficient Rodkicker rigid vangs.


 WHY YOU NEED A NEW BOOM

WHY YOU NEED A NEW BOOM

The most common upgrade is to a Single Line Boom. Remain in the cockpit and pull one line to reef your sail and you will prevent adventurous maneuvers at the mast. It’s quick, safe, easy to handle and convenient.

It’s full of potentials. A new boom is prepared for Rodkicker, Lazy jack sliders, easy installation of a stack-pack system and boom light that will lighten up your cockpit at night.

MAKE IT HAPPEN – IT’S EASY

To decide what you need, here are a few useful steps:

  • Check if your boat is listed here. If it is you will know what size boom we recommend and its part number.
  • Find out how stiff your boat is by calculating the Righting Moment (RM) at 30° heel. This is done with our calculator.

Click on technical information below and use the dimensioning table for Masthead rigged boats or Fractional.

  • You need to know the RM, the E-measurement and the Y-measurement to make your choice and all those measurements are explained in this area.
  • Compare the forward end of the Seldén boom to the dimensions of the boom bracket on your mast. Clevis pin dimensions and width and depth of the forward end.

Or… just ask a Seldén dealer to figure it all out.


LIGHT BOOMS IN CARBON FIBRE

LIGHT BOOMS IN CARBON FIBRE

Seldén supply carbon booms that harmonise with its carbon mast range. Carbon booms offer weight savings of up to 35% compared to aluminium. This means that boom weight on a typical 35 ft boat is reduced from 30 kg to just 20 kg.

A lighter boom makes gybing less dramatic, as the boom has less momentum. This has a positive effect on the whole boat, especially with regard to the service life of the mainsheet
attachment.

A lighter boom also reduces the tendency of the boat to roll when sailing downwind and it improves the effect of the Rodkickers’ gas spring. The section modulus of a carbon boom is twice as high as that of an aluminium boom with the same weight per meter. A stiff boom makes for improved trim and thus higher boat speed.

Boats that sail IRC, and which are already fitted with a carbon mast, suffer no further rating penalty by up-grading to a carbon boom.

End fittings

In order to reduce weight, while still providing sheaves for single line reefing, we have made the inboard end fitting as short as possible. The outboard end, which is integrated into the carbon section, is finished with a carbon cover plate.

Mainsheet attachment

The mainsheet block is attached using a Dyneema® strop that passes through an aramid tube in the boom. Stainless steel bushings at either end of the tube prevent wear, while local carbon reinforcement provides the extra strength required. Booms with “German” split mainsheet systems have fastening positions for blocks at the inboard end, and two webbing strops to hold up the mainsheet.

Vang attachment

The carbon booms feature hand laid local reinforcement in the vang attachment area.

Reefing options

Carbon booms can be supplied ready for conventional slab or single line reefing. Clutches can be integrated into the inboard end if you do not wish to lead the reef lines to the cockpit.

OUTHAUL

The standard Seldén outhaul system features a Dyneema® outhaul line for leading back to a winch in the cockpit. As an alternative, an internal cascade system with up to 20:1 purchase can be used and operated by hand from the cockpit or by a crew member hiking on the rail.

 


BOOMS FOR DINGHIES

BOOMS FOR DINGHIES

Seldén dinghy booms have been designed to offer the ultimate in stiffness, weight and functionality. From single-line reefing systems to high-purchase internal outhaul systems, Seldén booms can be equipped with a range of sophisticated features that will make your sailing easier, faster and more convenient.
Class rules are closely studied to push performance to the limit. For example, the Olympus boom section optimises the 470 class rules to give the lightest and stiffest boom the class rules allow.

All sections are optimised for high resistance against vertical bending and come with an integral sail track and lower in-boom track for mainsheet and kicking strap attachments.

Technical Information