Fiberglass Repairs

Although Jet Stream is in extremely good condition, there are still several places where the fiberglass must be repaired. In all cases, the repairs will be made with epoxy resin rather than polyester because of the better adhesion and structural qualities of epoxy. I have selected MAS Epoxies because it seems to be easier to wet out the fiberglass cloth with its lower viscosity.

The main areas requiring repair are:

1) The port quarter deck. Collision damage was previously repaired with "Bondo" and a single layer of 10 ounce cloth. Backing boards were screwed to the underside of the deck but the overall repair had voids where water could get in and was not structurally as strong as the rest of the deck. I particularly wanted to repair this as it must stand the strain of winches installed on the deck for Genoa and Main Sheet.

2) The port side keel. A grounding has left a breach through the fiberglass into the sump tank. This will be somewhat difficult to repair as it is very difficult to get at the inside unless you have four-foot arms.

3) Port side midships. This gonk is probably from the same grounding that holed the keel. It does go all the way through the laminate, although it should be aesy to repair.

4) Rudder. The rudder has some fairly serious delamination that could be attributed to the last grounding or just to mother time. The rudder has been modified sometime over the years and those modifications might also have contributed to the demise. It has had about 2" added to the trailing edge that has also been tapered from the very blunt factory edge, to a knife edge for less drag. I agree with this modification as I've heard that some owners found the rudder not as effective as they'd like (especially downwind). In addition, the prop cutout has been faired to minimize the opening and provide good thrust. I will likely keep that modification as well. To make these repairs, I plan to remove one side of the laminate, inspect/repair the metal structure and reassemble with epoxy. I'll redo the entire trailing edge mod with proper core and glass.

Port DeckPort Deck Under
Port Quarter DeckQuarter Deck Underneath

Keel BreachPort Gonk
Port Keel BreachPort Midship Damage

In addition, there are modifications required that will involve some fairly serious fiberglass work. The biggest of these is the addition of propane lockers to the cockpit. The plan for this is to install two 10 pound, aluminum cylinders aft of the main cockpit lockers. The cylinders will be horizontal mounts, with one on each side, to allow adequate height for a drain line from the lockers to a point above the waterline. Hopefully, I will be able to construct cylinder lockers with lids that will match the existing teak cockpit locker covers.

I have examined the core material from the deck and found it to be something different than what is used today. Apparently, the deck was laid up by putting down gel coat, followed by two layers of mat, and then a liquid core material was troweled on wherever they needed extra stiffness. Once the core set, a layer of 24 ounce woven roving was put over the whole thing. The core material has a density of about 36 pounds per cubic foot and seems to be phenolic based with wood flour or some other low density filler.

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