PS Asks Who Would Even Consider G7 Chain?
The value of catenary varies with the depth of the water. In shallower waters, bottom friction replaces gravity as a force of resistance against shock loading.
Making Sense of Marine Chain Standards
Chain is made from wire. The cross-sectional area and strength of the wire determines the strength of the chain. The weld of each link should be stronger than the wire, so if a chain breaks, it should break in the body (wire)-usually at the crown, or the curve in the link-not the weld.
Tefcite Coating Fails Static Panel Test at 1 Year
Our quest for new antifouling paints recently took us into the world of long-life spray-on coatings promoted in the commercial-shipping industry. While the spray-on, thermoplastic composite powder Tefcite may work well on a ship thats moving at 13 knots for most of its working life, it failed surprisingly fast in our static panel tests.
Imtra, Hella Dome Lights Shine
In our previous cabin light reviews (PS, May 2010 and January 2009), the transition from incandescent lighting to fluorescent and finally to LED was favorably noted. Since then, the evolution has turned into a solid-state revolution, and LEDs bolstered by dimmers, touch switches, and watertight seals now own the show. And a clean-sweep conversion to LED cabin lighting can knock out the grotto-like ambiance that haunts many sailboat interiors. Often, its not a problem of having too few lights; its an energy shortfall revolving around too few amperes to spare. An LED makeover is also an opportunity to illuminate the lockers, engine room, and other cave-like confines that cause you to reach for a flashlight and wish for an extra hand to hold it. Not only is the timing right to tap into a new genre of energy-efficient lights, but the product range and pricing offer a gameplan for every budget.
Shurhold Buffing Pad Cleaner
During our April 2014 performance test of rubbing compounds, we sullied a dozen brand-new wool buffing pads, all of which were Shurhold brand. Since quality buffing pads are reusable (and not cheap), we thought the rubbing compound test was a great opportunity to also check out Shurholds new, professional-grade Serious Pad Cleaner (No. 30803). Mixed with water, this powdered concentrate is formulated to dissolve compounds and waxes from wool, polyester, cotton, microfiber, and foam buffing pads or cloths.
Real-World Anchoring
After nearly four decades of being married to my CQR plow anchor, I decided to try a new anchoring solution aboard my Ericson 41, Wind Shadow, and mounted a Manson Supreme on her bow roller. Ill be long-term testing the Manson, but heres a preliminary look at the CQR and the Manson.
Aggressive Hull Cleaning Stirs Up Copper Debate
Early this month, irate boat owners from Marina del Rey, Calif., packed the regional water-quality board meeting, protesting a rule that would require them to switch to a copper-free antifouling paint by the year 2024. The board unanimously voted in favor of the rule, moving it another step forward in the legislative process-a bureaucratic cricket match that will drag on for several years.
Anchor Rode Report
In our continuous research of ground tackle, we noticed that large oil rigs are often anchored into place with a spider web of stranded wire-or in some cases, Dyneema, a low-stretch, high-strength synthetic fiber. We wondered whether Dyneema or a wire cable might have some application in recreational sailboat anchoring, and we launched field tests to find out. These tests also looked at how changing the diameter of your anchor chain affects anchor performance.
Rodes Tested from Shore and Catamaran
Our test anchors included a small, 11-pound Spade anchor, which we set using a chain winch off a beach in Pittwater, Australia. We set the anchors using two different rodes: 30 feet of 5/32-inch stainless wire strop that we fabricated using old lifelines and 33 feet of quarter-inch, short-link BBB chain. We extended each rode with 5/16-inch chain and aimed for length-to-depth ratio of a 5-to-1.
Mantus Upgrades to a Stronger Shank
Late last year, we had our first look at the bolt-together Mantus anchor. Although we liked the design, and prices were favorable (around $330 for a 35-pounder), we raised concerns about the shank strength, which by our estimation was the weakest of all anchors of a similar design.