Groaning noise in boom from 2nd reef

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   I have just started to get a persistent groaning noise inside the boom when using the second reef.  This occurs as the sail moves due to gusts or waves.I've got the Selden diagrams on the internal workings of the reef in the boom, but I'm wondering if anyone has tried removing the outer boom end fitted to access these.  Any tips I should be aware of?

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S&J Members Profile Send Private Message Find Members Posts Add to Buddy List Admiral Joined: 30 August 2014 Location: Perth WA / Med Status: Offline Points: 1371	Post Options Post Reply Quote S&J Report Post Thanks(0) Quote Reply Topic: Groaning noise in boom from 2nd reef Posted: 31 May 2025 at 08:31
	I have just started to get a persistent groaning noise inside the boom when using the second reef. This occurs as the sail moves due to gusts or waves. I've got the Selden diagrams on the internal workings of the reef in the boom, but I'm wondering if anyone has tried removing the outer boom end fitted to access these. Any tips I should be aware of?
	H458 #159 Primal Mediterranean cruising

marsella Members Profile Send Private Message Find Members Posts Add to Buddy List Rear Admiral Joined: 21 June 2022 Location: Antigua Jolly H Status: Offline Points: 592	Post Options Post Reply Quote marsella Report Post Thanks(0) Quote Reply Posted: 31 May 2025 at 09:55
	I do have some particular sound coming from the boom under certain wind conditions, but with my furling main the boom is pretty much like an empty pipe, and so far I attributed this sound to a standing air wave...same as in organ pipe ...but maybe there is more to it

kipwrite Members Profile Send Private Message Find Members Posts Add to Buddy List Commadore Joined: 14 October 2015 Location: New York Status: Offline Points: 495	Post Options Post Reply Quote kipwrite Report Post Thanks(0) Quote Reply Posted: 31 May 2025 at 12:44
	I've removed the end fitting previously when I replaced a damaged reefing line. It's a bit of a fiddly job. As I recall removing the screws is fairly straightforward. You'll likely need to loosen all the lines and use a soft mallet to get the end fitting to budge - mine was quite crusty upon removal. The two slides in the boom run on metal tracks that don't seem to be lubricated, and I've always thought the groaning inside my boom when reefed was the result of these slides shifting around under strain. Make sure you have a strong light or two and some very long objects (battens?) with hooks on the end may come in handy - and make use of messenger lines if you run out of rope as you move things around. Might be a good time to replace some shivs as long as you are in there. Good luck.
	Kipwrite



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