Dr Peter Posted December 5, 2011 Report Share Posted December 5, 2011 All the rivets just sheared off about half way down the port side. Ended my race. I recorded a DNS. Luckily enough I had a Mark 1 just waiting to be rigged with my new sail. Sooooo a question. Is it worth fixing or should I just find another boat? Peter Link to comment Share on other sites More sharing options...
ymick Posted December 5, 2011 Report Share Posted December 5, 2011 i re riveted track on windrush it seem to hold was not that big a deal re fitting tramp no fun i have very little skill and experience so treat my comments as such Link to comment Share on other sites More sharing options...
Pointed Reply Posted December 5, 2011 Report Share Posted December 5, 2011 In my opinion... Drill out all the rivets from both sides, glass up all the old holes and sand back to a smooth even surface. Get two new strips of aluminium and drill new holes between the old holes and rerivet. Or just try swapping the old strips from port to stb. Some will recommend the use of "caravan track" for the tramp bolt rope, I don't like this as it creates a lump to slide over. And it looks scruffy. The standard strip gives a nice smooth surface. But if you want to buy a really good Mark II let me know ! Link to comment Share on other sites More sharing options...
korwich Posted December 5, 2011 Report Share Posted December 5, 2011 caravan track was'nt a problem for my bum to slide over, and I thought it looked OK. This has happened to every 2nd hand boat I've owned, so it is not just a problem in isolation for you. Link to comment Share on other sites More sharing options...
korwich Posted December 5, 2011 Report Share Posted December 5, 2011 caravan track was'nt a problem for my bum to slide over, and I thought it looked OK. This has happened to every 2nd hand boat I've owned, so it is not just a problem in isolation for you. Link to comment Share on other sites More sharing options...
knobblyoldjimbo Posted December 5, 2011 Report Share Posted December 5, 2011 caravan track is the only effective way to stop the tramp ripping out (although of course I defer to Rod's greater experience) you'll need some 7mm polyprop rope to put into the tramp - most others will just compress and slide out. On my last mari I used air tube from Clarkes and blew a 2mm marlow line through the hole - worked good. The cat I now had came with an odd type of 'rope' was very stiff and 7mm - I guess most sailmakers would have this type of stuff. Brenton told me that some bunnings have it but I got mine from Darcy. I drilled out the holes then drilled the track using the old plates as a guide then sikaflexed it down then pop rivetted it. use the big long pop rivets and a scissor pop riveter - I used a small hand one and nearly crippled myself doing one side (I then jumped into the car and borrowed Darcy's!). Use washing up liquid to lubricate the track and tramp (it washes out once installed). Do the tramp up TIGHT which stiffens the hulls up. Use the spare cat until you have a lazy afternoon to do it! Sorry, one more thing, the bolt rope that works with the plate is generally too thick (8mm) to work with the track. My 'new' cat came with 7mm bolt rope which was probably why it pulled out of the plate in the first place. Link to comment Share on other sites More sharing options...
darcy1945 Posted December 5, 2011 Report Share Posted December 5, 2011 The most important part of this operation is drilling out the old rivets. With a thin parallel punch, punch out the old rivet steel mandrels, this will allow your 3/16" drill to run neatly down the middle without enlarging the old hole. Using the original holes where possible leaves the hull stronger, (rather than creating a tear along the dotted line effect). I believe that the caravan track is the best way to go (I have seen hulls crack down the tramp groove, the caravan track mod transfers the load horizontally to the rivets). Use the old flat alloy as a template to drill the new van track. Link to comment Share on other sites More sharing options...
darcy1945 Posted December 5, 2011 Report Share Posted December 5, 2011 PS. Use 5/8" to 3/4" by 3/16" alloy rivets, monel or stainless will crack the glass, use plenty of Duralac on each rivet (It cleans off with turps), tie a strong light line to the bolt ropes to aid in pulling the smaller dia bolt rope back into your tramp. Link to comment Share on other sites More sharing options...
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