Another breakage over the weekend, this time the rear beam.

Wind was gusty and strong but died in the afternoon. While sailing back in the crew noticed a large crack just inboard of the inside bolt, still under the washer. Completely through and clean, typical looking brittle failure. Does anyone have any wisdom/experiences to share on this. I'm fairly convinced it is related to fatigue. I had been contemplating replacing them as they are old and corroding around the fittings, but now my hand has been forced.

It was interesting to note that the boat didn't fall apart, even with me sitting above the crack getting the rudder up. The tramps seemed to be holding it all together. If it was the final race of a regatta with a win needed, I could've still sailed it hard in anything upto 15 knots and I think it would've held together. It was bizarre!