The Karver range of furling units has come a long way in the last 10-15 years, with each aspect of the design seeing incremental improvements. Captive pins with quick release mechanisms are almost universal on furling drums and swivels these days and they too have seen considerable development. The quick release mechanisms rely on small springs which can get damaged and require replacement. This blog will outline the evolution of the Karver captive pin systems and help you identify the correct replacement spring kit for your Karver furler.
Here at Upffront, we talk a lot about asymmetric sails and code zeros, and with good reason! Faster and more manageable, these are a popular choice among many sailors, with one caveat, they require a tack point for the drum forward of the forestay, which preferably means a bowsprit.
While most modern, performance sail boats have permanent bowsprits attached, many older boats require modification to install a bowsprit and get those precious few extra feet on the bow.
Image credits: Facnor
The top-down adapter, also known as a tack swivel, is an increasingly popular evolution of the top-down furling system. This technique provides cruisers and racers alike, simplicity, safety and speed for the handling of loose luff sails such as asymmetric spinnakers and gennakers.
Image Credit: Doyle Oleu Sailmakers
Previously on the upffront.com blog, we looked at how to measure a new torsional cable for your boat, and emphasised the importance of an accurate measurement to ensure a correct cable specification for your new code zero or downwind asymmetric.
When it comes to furling cables, custom top-down cables (for loose luff, asymmetrical gennakers) and bottom-up cables (for code zeros and staysails) can sometimes be expensive. For small to medium sized racing and cruising sailboats (up to 45ft), torsional rope can often be a viable and cost-effective alternative for performance furling systems.
Image credit: Karver
BY ANDY RICE, INTERVIEWING BJARNE LORENZEN
In part three of this blog series, Bjarne Lorenzen of sailmaker Doyle O’leu explains the benefits of top-down furling, one of the big developments of the past decade which has trickled down to the cruising scene from the Volvo Ocean Race.
Image credit: Facnor
You have decided to go for a new code zero or downwind asymmetric. To ensure the furling system fits your boat, it is important to take a physical measurement of the maximum space available from the attachment point of the drum to the full hoist halyard position.
You have a 25ft sportsboat and need a top-down furler, which one should you choose?
One of upffront.com's key principles is to offer a good selection of hardware and rigging options with high quality technical information to give you the information you need to make informed product choices.
What are the key differences between bottom-up and top-down furling units and do I need a dedicated unit for each type of furling?