Archive for the ‘Maintenance’ Category

Spring has sprung loos

Tuesday, March 20th, 2018

On Sunday, March 18th the J/24 SF Fleet 17 hosted our first in a series of race clinics. We’re hosting these by ourselves, for ourselves (and any interested crew and potential crew) because as a fleet we always enjoy sharing knowledge with each other, always learning and re-learning, and just hanging out.
When you go sailboat racing, the first thing you need is a boat. And the J/24 is the most popular One Design class in the world*. If you can competitively sail a J/24 in SF, you can race pretty much anywhere. In a classroom type setting, Jasper Van Vliet led us through the basic measurements and mechanics of the J/24, mostly discussing some universal concepts and their impact on boat speed (e.g. Shroud tension, mast butt placement, keel shape/location, boat heel, and lee helm).
We then headed to the yard where dusted off the J/24 class keel template and measurement guides to demonstrate how to measure the keel width, the J-measurement, mast butt placement. We then plunked three boats in the water and got our shroud tensions to match up. And I can tell you that one Loos gauge’s “Base” was another gauge’s “+1”. Those springs don’t last forever.
Finally some breeze came up so we could take it on the water and run tacks side by side. On starboard, Brandon’s point and speed was much, much higher. We exchanged info on trim, jib car and traveler placement to try to make it all equal. Even then we still couldn’t catch him. The other tack was a very different story. Again, here were the shrouds giving a winter shadow – they were spun up in the wrong direction! Massive difference between 1 below base vs. 1 above base.
Same boat, about the same crew weight, going the same direction. One Design sailing at its best. Hanging out with some of the nicest sailors we know. Priceless (and Free). Next up: Starts! (April 15, 2018, 10am – probably at Richmond Yacht Club)
If you don’t have a boat, contact us. We’ll find you one.

Keel Bolts

Wednesday, May 11th, 2011

We just saw this article from Waterline systems that may hold your attention. Something to talk about over the weekend. I’ve cut and pasted the text, but the actual article is here
Maintenance Bulletin
Keel Bolts
Keel Bolt Maintenance Bulletin
There aren’t many maintenance areas that are more important, or more often overlooked than keel bolts. This is true for every
boat, but particularly so for J/22s, J/24s and J/80s, all of which routinely hoist the boats in and out of the water using the bolts.
Failure of any keel bolt is bad, but most bolts are part of a massively redundant system, where the failure of any one bolt is rarely
immediately catastrophic. For boats that are hoisted, the failure of a bolt holding the lifting gear can be catastrophic and has the
potential to lead to the loss of the boat, or much, much worse.
While this article is being distributed to USWatercraft and J/Boats customers, it applies to virtually all production boats, regardless
of builder or brand. If they use Stainless Steel keelboats and most of them do, it applies. Feel free to pass it along to your
friends and fellow boat owners. It’s pretty important.
Since they live in the bilge, keel bolts can fall into the category of “out of sight, out of mind”. It is because they live in the bilge that
they need routine care and attention.
J/22 keels are made using 316 Stainless Steel threaded rod, which is cast into the lead. The nuts, washers and lifting bar are made
using 304 Stainless and are then electro polished. This has been the industry standard for many years, and has provided many
years of service life.