Sailspar booms can be bought in either kit form or fully assembled. As standard each boom comes with 3 internal slab reefs, except the F36 which has only 2 reefs, a clew outhaul, a topping lift, a kicker take off, tack hooks, a tack shackle and a mainsheet baile. Each section is silver anodised as standard, however different colours are available as an optional extra.The inboard boom end has 4 sheaves and a jammer, except the F36 which has 3, which allows you to make the reefing linest off without the need for further cleats.
Lazy jack systems, single line reefing and extra sheet bailes are just some of the optional items available. Boom sizes available are
F36 with a maximum length of 3.35 mtrs
F60 with a maximum length of 4.0 mtrs
F125 with a maximum length of 4.6 mtrs
F220 with a maximum length of 4.87 mtrs
F550 with a maximum length of 5.77 mtrs
F810 with a maximum length of 6.8 mtrs
F1700 with a maximum length of 7.1 mtrs
F3400 with a maximum length of 7.5 mtrs

SINGLE LINE REEFING

Single line reefing means that you have the ability to reef the sail whilst in the cockpit by pulling on one single piece of rope with no need to go forward to attach the sail to the tack hooks. A maximum of two single line reefs can be fitted to a boom but the third reef and the clew outhaul are still available as in the standard boom. The secret is in the travelling back-to-back shuttle block. The reefing line starts in your hand in the cockpit, goes forward to a block at the base of the mast, then upwards to the bottom of the boom where the rope turns 90 degrees on the sheave. The reefing rope continues aft to the back-to-back shuttle block, where it turns 180 degrees whilst going through the front of the two sheaves on the block. After leaving the block the line continues forward to the upper sheave in the inboard boom end where it exits out of the top of the boom and attachs to the sail. At the other end, the line starts on the slab reefing baile on the aft end of the boom, passes upwards to the sail cringle and hence to the outboard boom end. The line turns on the sheave as it passes inside the boom to the rear sheave on the back-to- back shuttle block. From this point as passing through the sheave the line takes a final 180 degree turn to finish on a dead eye inside the boom.