Force10 0 Posted November 19, 2019 Share Posted November 19, 2019 20 foot mast, broken 2/3 of the way up. any suggestions to repair it A replacement mast , even if adapted to fit would be a more likely prospect, but curious how it’s been done . Quote Link to post Share on other sites
WCB 419 Posted November 19, 2019 Share Posted November 19, 2019 You really only have one option, to sleeve it. What class of boat is it? 1 Quote Link to post Share on other sites
Major Tom 416 Posted November 19, 2019 Share Posted November 19, 2019 Probably needs an internal sleeve with a greater wall thickness than the original mast wall thickness as well as an external sleeve wrapped around the front 60% of the section, could use a piece of similar extrusion with the track cut off for this. the biggest problem is finding a round extrusion that will be a tight fit inside the broken section, you might need to cut a price out if the length of the sleeve to allow it to close up so it will fit. The sleeve needs to be a decent grade alloy as well or it could easily end up with a permanent bend at the join. Bonding everything together with Sparbond and monel rivets will help as well. Good luck Quote Link to post Share on other sites
European Bloke 492 Posted November 19, 2019 Share Posted November 19, 2019 A sleeved aluminium mast will never be the same again, particularly one sleeved in that area. What's the insurance option? Quote Link to post Share on other sites
Terry Hollis 324 Posted November 19, 2019 Share Posted November 19, 2019 If the mast broke because of a rigging failure the above suggestions are ok but if it is an old mast that failed for no obvious reason it might be fatigued and past it's use by life. Have an engineer look at the break so you will know if it's a fatigue or ductile failure. 1 Quote Link to post Share on other sites
Force10 0 Posted November 19, 2019 Author Share Posted November 19, 2019 Terry, fatigue seems the diagnosis, thanks, it is probably past it’s sell by date, or this case SAIL by date.lol the boat is a 1970 Chrysler Lone Star, 13 foot. V.Good except now the mast. appreciate the reply’s, all of them. Cheers Quote Link to post Share on other sites
fastyacht 1,604 Posted November 19, 2019 Share Posted November 19, 2019 26 minutes ago, Force10 said: Terry, fatigue seems the diagnosis, thanks, it is probably past it’s sell by date, or this case SAIL by date.lol the boat is a 1970 Chrysler Lone Star, 13 foot. V.Good except now the mast. appreciate the reply’s, all of them. Cheers LOL. Quote Link to post Share on other sites
Dart96 22 Posted November 20, 2019 Share Posted November 20, 2019 We have a similar problem. Laser 2 blew over in recent storms. Mast broke at the shroud bolt really cleanly. Cost of a replacement minimum is £500-700+VAT and insurer will only pay £200. Boat is scrap unless repaired. Having chewed it over, we will be laminating an external epoxy glass sleeve (internal sleeving is not possible in this particular case due to the removable top mast which is a snug fit inside the section that has broken off), probably 3-400mm each side of the break. Because the sleeve cannot go all the way around the mast due to the mast track the edge closest to the track will be thickened to resist the compression and also pop rivetted to the mast. We have used the laminate and then pop rivet technique on other boats where adhesion was likely to be poor or non existant. I intend to vac bag it all. Quote Link to post Share on other sites
European Bloke 492 Posted November 21, 2019 Share Posted November 21, 2019 Loads of old wrecked L2 sat abandoned at clubs. Mostly not used cos the hull is so fucked they sink. Perhaps you could appropriate a new/used rig out of one of those? They must be on the clubs to get rid of as abandoned, would go on the bonfire if they were wooden, list. 1 Quote Link to post Share on other sites
blastfurnace 6 Posted November 22, 2019 Share Posted November 22, 2019 if it doesnt need to be a tapered section ( sorry im unfamiliar with the lone star ) a straight section for a 13 foot dinghy wont be expensive. and probably not too critical on size of section ( if youre not racing and dont need to conform to class rules) id suggest a couple of hundred bucks? for the section anyway. Quote Link to post Share on other sites
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