Dyneema Loops/Blocks as an Alternative to a Jib Car

[noelex 77]

This thread is inspired by Dockhead's thread here:
http://www.cruisersforum.com/forums/...-146541-3.html

As this thread is above thread about splicing I thought it was better to start a new topic on this application.

Dyneema is revolutionising sailboat fittings. The advantage is mainly in reducing weight for the keen racing crowd, but there are lots of applications for cruising boats.

One of the big advantages is the sheet lead can easily be moved inboard or outboard, for example to the toe rail, without re threading the jib sheet line (as well as the normal forward and back). Thus it is far more adjustable than a traditional jib car.

The jib and staysail track require a lot of stainless steel bolts. The dissimilar metal is not ideal for an aluminium boat. In addition, I have seen problems if the tracks or cars need replacement. A new version often does not fit the bolt spacing of the old track or a new track car is no longer available to fit the track profile.

There are a number of Dyneema blocks or even simple loops that I think could replace the traditional car and track systems, especially on an aluminium boat. These can be attached to deck loops that are welded on. Fibreglass boats could still take advantage of the system with stainless loops.

Simple, cheap (at least much cheaper than a conventional track), easily replaced, and low maintenance (especially the loops). It seems to fulfil most of the criteria important to a cruising boat. The more adjustable sail shape and light weight are bonuses.

Thumbs up or down?

Here is an example from one manufacturer. It is not obvious from the photo, but even the block can be unclipped and moved, say to the toe rail if a wider sheeting angle is desired. This can be done while the jib sheet remains threaded through the loop or block.