Dear all,
Please make notes of the following items:
- There is a dispensation from World Sailing for Yngling masts in place to allow masts with different dimensions than mentioned in the class rules. This dispensation was granted to test new mast profiles with a slight different profile than we have currently in our Class Rules, e.g., Selden C087. To allow people to participate in official regattas with this mast, the dispensation must be published on the regatta homepage at the latest 2 weeks before the event starts. Please use this option as much as possible as this will help to develop the class hand have more than one mast supplier available in future. This dispensation can be found as well on sailing.org on the Yngling page.
- Based on an accident in the Soling class, the Norwegian Yngling Class made a survey on the Keel bolts of some Ynglings and found out that some keel bolts and nuts and washers are corroded or do not have the correct torque. Due to the findings it is probably worth to inspect the keel bolts and make sure that they are in a good shape. Please make your members aware of this. Please see as well short summary of the NO report below.
The Norwegian Soling club and the Soling Association has put some focus on aging boats and keel bolts. This was triggered by a centrelift on an ~1980 Abbott failed and the boat fell from the crane summer ’24. They have issued a „keel report“ after the investigations, listed here: https://www.norsk-solingklubb.no/en/class-rules/
In short, as I perceive it, the issue is too low stainless steel grade in bolts of pre ~1990 Abbott Solings. (304 or A2 steel and not 316 or A4). But 316 steel is not the complete answer for eternity. Even that steel grade is prone to issues. As far as we know, the Early Borge Bringsvær built Ynglings have 316 steel bolts, nuts and washers. But we’ve observed issues with those on the oldest Ynglings, refer:
https://yngling.no/mer-om-kjolbolter-muttere-gjenger-rustfritt-og-syrefast-stal-og-korrosjon/
And, as they’ve worked on locating and fixing small leaks in the self bailer double bottom of a 2003 Børresen, they had the mid part of mid section of the floor opened. Checking the keel bolts, they found the torque on the nuts was quite low. They could loosen them with 10-30Nm. This is quite lower than typically table values for M12 SS bolts should be.“
Let me know if there are any further questions.
Thanks & Regards
Christian Dylla
Yngling Technical Committee