stingray580 Posted May 4, 2011 Report Share Posted May 4, 2011 ok next stage in the winter maintenece program is to replace the old centreboard gaskets, as they have died a most horrible death!!! the existing remnants look like they are made from a vinyl floor covering almost like lino. i am considering using something like a stencil mylar. anybody have any experience in this or suggestions? cheers Link to comment Share on other sites More sharing options...
Paul124ac Posted May 4, 2011 Report Share Posted May 4, 2011 I made some for a Hydra from insertion rubber, basically rubber sheets with a canvas woven core. Got it from Purple Pig. Link to comment Share on other sites More sharing options...
Damo Posted May 4, 2011 Report Share Posted May 4, 2011 Mylar works well but I would reconmend thicker the better say .03 or 0.5mm just talking from experence (the rubber sounds interesting) Cheers Link to comment Share on other sites More sharing options...
knobblyoldjimbo Posted May 4, 2011 Report Share Posted May 4, 2011 have a look on Sailing Anarchy in the Dinghy section, there's a thread going on there about gaskets. Link to comment Share on other sites More sharing options...
stingray580 Posted May 5, 2011 Author Report Share Posted May 5, 2011 thanks knobbly i had a look at that last night. very good explanation on how to fit them. but we dont use keel strips to hold them down. ill find something i guess and post the results!! Link to comment Share on other sites More sharing options...
Loose Change Posted May 6, 2011 Report Share Posted May 6, 2011 Like Paul124ac with the Hydra, I also made mine out of insertion rubber for my Stingray. The trick to making them stick is make sure that everything is meticuously clean, sanding the recesses on the bottom of the hull and sanding the rubber strips themselves and then washing with lots of acetone before applying the contact cement. Make the strip for each hull out of one piece of rubber and only cut the slit as long as you need to and the strip will hug the board almost like a fillet. Harry Link to comment Share on other sites More sharing options...
stingray580 Posted May 6, 2011 Author Report Share Posted May 6, 2011 one piece??? they advice i have had is to use two with a 5 -10mm overlap. the reason is that it seals better when the plates are up keeps the water running past the case not letting it fill. Link to comment Share on other sites More sharing options...
Loose Change Posted May 8, 2011 Report Share Posted May 8, 2011 If the material used is stiff and rigid enough (like insertion rubber) then it will not deflect enough to allow the water to shoot up the case. Harry Link to comment Share on other sites More sharing options...
stingray580 Posted May 8, 2011 Author Report Share Posted May 8, 2011 thanks harry, where did you purchase the insertion rubber?? Link to comment Share on other sites More sharing options...
stingray580 Posted May 8, 2011 Author Report Share Posted May 8, 2011 i guess if it doesnt have the overlap, its less likely to fold back in and jam the boards down? Link to comment Share on other sites More sharing options...
NixonJr Posted May 8, 2011 Report Share Posted May 8, 2011 Yes we only use one piece on the cobras, They can jam both ways but its mainly when you are trying to pull the boards up (centerboard grips to the rubber and rolls around and then jams) Link to comment Share on other sites More sharing options...
Loose Change Posted May 8, 2011 Report Share Posted May 8, 2011 Insertion rubber should be able to be bought at most places that sell industrial rubber products, I believe that Clark Rubber also sell it. Harry Link to comment Share on other sites More sharing options...
stingray580 Posted May 9, 2011 Author Report Share Posted May 9, 2011 OK clark rubber advertise it on their website. they sell it in 50/100/150mm strips. is the 1.5mm stuff the way to go?? im assuming my recess in the hull is not much more than that. Link to comment Share on other sites More sharing options...
Loose Change Posted May 9, 2011 Report Share Posted May 9, 2011 From memory I think mine would have been closer to 3mm thick. My hulls were built by a bloke in Brookvale in the early 70's, his name was John Simpson and iffn my memory still functions he was just around the corner from Flower and Adams the makers of all shit hot Stingray sails back then. Sail number 177, I still have the plans. Link to comment Share on other sites More sharing options...
stingray580 Posted May 9, 2011 Author Report Share Posted May 9, 2011 thanks loose, i guess ill just measure the thickness of the recess when i get back home, go form there. cheers Link to comment Share on other sites More sharing options...
Loose Change Posted May 10, 2011 Report Share Posted May 10, 2011 Ok, I lied, I just had a look at my plans and they weren't issued till the 24/11/1974 and signed by Geoff Clarke so my hulls were built early 1975. I remember picking them up from John Simpson's shop in my Kombi and driving through the Cross to get back home and everyone looking at the hulls ...and then at me. What were they thinking? I don't recall how much of the hulls was poking out the back of the Kombi but I know it was a bloody lot, these days you would be nabbed by the cops in the first minute of attempting anything like this. White with egg yellow bottom and stained Bruynzeel Gaboon decks, gees that was a pretty looking boat. Link to comment Share on other sites More sharing options...
stingray580 Posted May 10, 2011 Author Report Share Posted May 10, 2011 ????? hang on.. stained gaboon, then white, then egg yellow......pretty????. mate i think youve had too many trips to the cross in your kombi!!!!!!!!!! Link to comment Share on other sites More sharing options...
Loose Change Posted May 11, 2011 Report Share Posted May 11, 2011 Maaaate, ya gotta stain Gaboon, it's the most god awful butt ugly timber out there, as boring as bat crap in fact. Anyhow, as i was lookin at the plans, nowhere could I find the thickness of the gaskets mentioned. Harry Link to comment Share on other sites More sharing options...
stingray580 Posted May 11, 2011 Author Report Share Posted May 11, 2011 hahaha its not the stained gaboon that worries me............. Link to comment Share on other sites More sharing options...
Paul124ac Posted May 12, 2011 Report Share Posted May 12, 2011 I don't know if it's needed or why but the original Hydra gaskets had a 20mm hole either end of the slot, so I did the same, I'm guessing it's to allow the rubber to flex easier? They are held in with a stainless plate. Link to comment Share on other sites More sharing options...
mitchlb44 Posted May 12, 2011 Report Share Posted May 12, 2011 The hole at the end of the slot is to stop the rubber tearing open along the line of the slot. 20mm is probably excessive though. I would have thought 4-5mm would be more than enough. Link to comment Share on other sites More sharing options...
stingray580 Posted May 30, 2011 Author Report Share Posted May 30, 2011 ok ive managed to purchase the insertion rubber from clarkes. 100mm x 1.5mm. im going with the single piece and cut the slit down the middle once it has been glued on. it seems pretty slippery so hopefully it wont grab onto the plate as im coming back to the beach. that can only end in tears. Link to comment Share on other sites More sharing options...
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