Skip to main content

Luff Considerations

Bob Boller of Benicia, Califonia, asks: "I have three headsails for my 1980 Catalina 30 and their LPs are 85, 110 and 150. As it does on many cruising boats, the bow pulpit interferes with the lower portion of the sails, especially the smaller two. What do you think about slightly raising the tacks of the sails up the forestay? What effect will that have on the performance
  • Author:
  • Updated:
    Original:

Bob Boller of Benicia, Califonia, asks:

"I have three headsails for my 1980 Catalina 30 and their LPs are 85, 110 and 150. As it does on many cruising boats, the bow pulpit interferes with the lower portion of the sails, especially the smaller two. What do you think about slightly raising the tacks of the sails up the forestay? What effect will that have on the performance of the sails?"

Win Fowler replies:

If this bothers you, by all means raise the sail up the forestay. There are both benefits and drawbacks to doing this, but all are relatively minor. The sail’s center of effort will be raised, which produces more heeling moment for the same sail area. Also, when the tack is attached to a luff pendant, there’s a chance the tack might move away from the axis of the forestay under load and that could perhaps damage the luff tape where it enters the feeder for the luff extrusion.

Any added heeling moment, however, will be pretty insignificant, and the risk of a stretched tack position can be handled by keeping sufficient tension on the sail and perhaps lashing the tack ring to the luff extrusion so it remains at the same distance from the extrusion as it would be if the tack were attached to the roller-furling drum.

When done correctly you won’t have any more chafe from the pulpit and you’ll have better visibility under the sail. You will benefit from a bit more apparent wind velocity coming from further aft but you will also have that small amount of increased heel. The effects of both are small, so you needn’t waste time calculating the results.

Related

Screen-Shot-2022-01-13-at-9.26.59-AM2048x

Video: Celestial Navigation Pt3

. In episode three of the Practical Celestial Navigation course, Andy Howe examines the theory behind celestial navigation, the celestial triangle and the celestial sphere, and why it is important to have a basic understanding of each. Topics introduced include zenith position, ...read more

01-LEAD-6.-After-2-years-ashore,-Nada-headsto-the-water-(3)

Sailing in the Time of Covid

In mid-August 2019, my wife, Terrie, and I laid up our Malö 46, Nada, in Falmouth, England, and flew home to Maine. We booked flights back to the UK for May 2020, anticipating a summer of cruising the Atlantic coasts of France and Spain. Then Covid struck. Remember that first ...read more

Ulysse Nardin promo photo

The Ocean Race Names Official Timekeeper

With just under one year before the start of The 2022-23 Ocean Race, Swiss watch manufacturer Ulysse Nardin has been named the official timekeeper of the race. The Ocean Race, formerly known as the Volvo Ocean Race and before that the Whitbread Round the World Race, announced ...read more

Arthur Daniel_RORC Maserati - RORC Transatlantic 2022 - Jan 15th -Social Media-4

Fast Finishes for the RORC Leaders

Over the weekend, the first finishers of the 2022 RORC Transat made landfall in Grenada, led by Giovanni Soldini’s Multi70 Maserati, which was awarded line honors with a corrected time of six days, 18 hours and 51 minutes. Maserati finished ahead of Peter Cunningham’s MOD70 ...read more

Background-02

Notice to Mariners: A Blog from the SAIL Editors

As a teenager, I stumbled across a copy of Derek Lundy’s Godforsaken Sea in the back room of a used bookshop. I had never heard of the Vendée Globe and frankly found all the boat-speak in the first 50 pages a little difficult to get through. But Lundy’s storytelling and the draw ...read more

Screen-Shot-2022-01-13-at-9.26.59-AM2048x

VIDEO: Celestial Navigation Episode 2

Celestial navigation is an invaluable tool for all kinds of sailors. In episode two of the celestial navigation series, learn the basic elements of navigation and the sight reduction process using declination and GHA to determine the Geographic Position and navigate using a ...read more

Film-poster-EP-2048

Cruising: Year of the Sea Shanty

Along with other timeless pursuits, like baking sourdough and gardening, singing sea shanties surged back into popularity during the recent lockdown, thanks, in part, to the app TikTok and its “duet” feature, which allows singers from around the world create music together. By ...read more

Book-Cover-9780712353700

Book Review: Sailor Song

Sailor Song is the ultimate guide to the music of working sailors during the 18th and 19th centuries. The book includes lyrics and sheet music for 50 of the most beloved sea songs with fascinating historical background on the adjoining page. Chapter introductions provide ...read more