racinginparadise

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19 Whiner

About racinginparadise

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  • Birthday 05/01/1961

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  • Location
    BVI
  • Interests
    Vintage Trimaran racing
    Ultra light powercats

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  1. racinginparadise

    'Triple Jack' rebuild...FU Irma!

    This was the 'pre-amble'.
  2. racinginparadise

    'Triple Jack' rebuild...FU Irma!

    The chain plate did indeed depart!
  3. racinginparadise

    'Triple Jack' rebuild...FU Irma!

  4. racinginparadise

    'Triple Jack' rebuild...FU Irma!

    Cracking on today before the first decent tropical wave passes by the VI tomorrow. The forecast is for some good rain but check out the new TJ water supply truck, 150 gallons and 40psi belt driven 12v pump. Some 3/8" H80 divinycell core went in on the aft beam to sponson frames. One lamination of biax in first to give the core something to bite on, then 4 on top. Happy days, the boat is becoming whole again. Another milestone was us deciding to remove the triangular SS welded chainplate. We have been staring at it for years wondering what lay beneath the surface, all was revealed today! To be honest once we had cut it out there was some significant corrosion but it didn't look likely to fail any time soon. However, it's nearly 40 years old, being SS it will slowly degrade until it fails with no warning and we lose the new mast. The triangle was HEAVILY laminated to the bulkhead, about 1" of heavy roving 'iron mat' either side. It certainly was not about to be ripped out, it was just crevice SS corrosion that bothered us. We will be making new chainplates off the boat by pulling uni around a 5/8" SS tube webbing out onto a new bulkhead that we will glass in place. The new shrouds will be lashed around a 5/8" clevis pin, see pic attached here. It's a lot of work but we would be foolish not to do it whilst the access is so good! Video coming up in a couple of days.
  5. racinginparadise

    'Triple Jack' rebuild...FU Irma!

    Steady progress today. We laminated the front beam connection, the first laminations since being craned back upright. We would have liked to get the base and walls done in one visit but that would have been 8-10 laminations, uni's and 45/45. Even with slow cure that would/could have been an 'exotherm'. I'm not a great fan of extra slow cure (Hawk resin in this case). It takes so long to cure, even down here, that the resin tends to bleed out of the verticals and puddle. The last time I used it I swear it took 9 days to cure enough to work it. Also even the extra slow mixes can 'exo', especially if knocked up in a big fill. Been there. We were happy to get half the laminate thickness sorted today and peel plied. Just in case anyone was in doubt how much grinding is still required I marked all required grinds with a marker spray. Our post laminate discussion was based on how to build and shape the new coachroof and what core to use. It looks like we have settled on 1" H80 Divinycell, plain sheets. We will saw draft whatever extra flexibility is needed rather than going for a diced core. Lay it out over a timber framework, lam the top, tape some joints below and then remove and turn upside down for 'inside' lams and stringers. It will be a challenge to blend the new in with the old angular shapes, we'll figure that out as we go along.
  6. racinginparadise

    Honeycomb too delicate for cruising?

    so Ras, what was the fail mode of Nida Core? Laminates separating off the core? Core failing in shear and collapsing? Heat causing delamination? Or just a really bendy boat that didn't break but was alarming?
  7. racinginparadise

    'Triple Jack' rebuild...FU Irma!

    Here's a short video shot yesterday.
  8. racinginparadise

    'Triple Jack' rebuild...FU Irma!

    Itch and scratch Sunday with multiple grinding centres in action. The remaining layers of mast step plywood chiseled away, more nasty core removed from the main hull bow and the stbd front beam 'peg' is now ground, feathered and ready for uni directional glass. I removed year's worth of rear beam to sponson wall repair laminates, it revealed torn original laminates next to the airex. I guess that's what 40 years of 'pulsing' followed by 'the big bang' does! We have decided to enlarge the main hull coachroof out to the aft beam inner bulkheads. That will take out the vertical wall that marked the start of the coachroof. We will need some fore and aft inner stringers under the roof to replace the structure...but are hoping for a cleaner, stronger, more modern look.
  9. racinginparadise

    'Triple Jack' rebuild...FU Irma!

    OK, here's a link to facebook for the 'Chainsaw Tuesday' video.
  10. racinginparadise

    'Triple Jack' rebuild...FU Irma!

    Anyhow, back on topic, it was 'Chainsaw Tuesday'. The chainsaw did great for about 5 minutes, after that the chain was blunt. Identifying weak glue between the many layers of plywood proved to be more effective. The late 1970's 'resourcinal' (?) glue was past its sell by date and the layers of plywood separated out quite easily. At least 80 llbs of useless weight gone, happy days!
  11. racinginparadise

    'Triple Jack' rebuild...FU Irma!

    so Russel, to briefly answer you question wrt. power cats... We worked on the drawings by O H Rodgers for a 28'x 10' power cat and built from scratch a 30'x 12' prototype, 'Innovation' It was meant to be the most economical way to transport groups of up to 15 people around the Virgin Islands. We built from scratch, lofted the frames on a strongback, built the plug with clear pine lathes followed by bondo and tooling gel, built a split mold over the plug, followed by 2 beam molds. A whole heap of work but many hours later out came a finished hull #1 We ran it for a year, took it to St.Martin with 2 50HP tohatsu's leaping from wave to wave just to see the Heineken regatta... To cut a long story short there was a lot of interest but no buyers. We sold it for a song to a St Thomas power boat charter company. Innovation 2 slowly followed. The aft beam got stronger and no longer sat up above the aft beam. The transoms came up 5" to take 30' outboards and we made a solid front deck. Once again lots of interest but we ended up selling #2 to the same charter outfit who loved #1. That was 6 years ago, both boats are doing great and will probably never wear out. Epoxy, triaxial, vacuumed decks, they are tough! They use 70HP outboards and can be seen all over the Virgin Islands with happy punters on board whilst sipping petrol. They wanted #3 but production costs prohibited any more builds. 'take the molds and build one in STT' I said, still no # 3. That's the end of the story, the molds flew away in Irma. I didn't lose my shirt but that's enough of new boatbuilding for me. The whole adventure probably deserves another thread!
  12. racinginparadise

    'Triple Jack' rebuild...FU Irma!

    2 Sunday's worth of progress to report. Last Sunday was mild progress concentrated around finishing up the 16x8 workbench with secure storage underneath and shade up top. Today was more brutal, and a real taste of what is to come. Steve focused on prepping the mating surfaces around the front beam to sponson connection. After much thought we are have come up with a laminate plan that we think will work. Paul removed the crushed Lewmar 80 hatch up front and started attacking what we call 'the bubble of bullshit'. This 'mound' is essentially a mast step that has been added to over the years. We reckon there's a good 50+ llbs of useless material there. The new mast came out of a keel stepped mono so we have plenty to play with. The new step will be mounted at deck level. Paul's attempts with a sawsaw were unsuccessful. On Tuesday evening we are getting out the chainsaw. I attacked the forward main hull decking, there are still seams of shitty foam up there that need to go. Very soon new glass will be going in, we are looking forward to that!
  13. racinginparadise

    'Triple Jack' rebuild...FU Irma!

    Well, another Sunday has passed, it has been a week of good progress. Today the 2 Paul's assisted by long time TJ admirer Mark conjured up a superb workbench, with underside secure storage to boot! Steve and I occupied ourselves by getting the final alignment of the stbd sponson nailed down. Next out came the fein cutter and the more animal metal cutting discs. In short order we had cut access panels to all the pertinent repair sites. To be honest we were both a little surprised that the sponson had not parted company with the main hull earlier in her checkered career. We are mindful that this 1979 airex/polyester structure has made it thus far by bending rather than breaking before Irma forced the issue. Having said that we are 100% confident that our repairs will be 'stronger than original, we just have to watch out not to make any part 'too strong' by creating hard points that could fail. The big news this week is securing a dream carbon fiber mast. It's a 'King Composites' spar from a 40' racing mono, complete with step, spreaders and all rigging. (Rod that we will not be using) We already have 3 masts in hand. Earlier in this thread you will find us salvaging the J54 carbon rig from Virgin Gorda. It was long enough and a real telegraph pole. It was also a great day out post Irma to go up there mob handed for the extraction. The alarm bells went off when we tried to lift the new acquisition up onto the roof/floor where the old Quantum loft used to be. It was HEAVY. Looking at the wall thickness we realized that this spar was magnificent but was designed for a brutish mono, not a 4 ton multihull. The 2 pictures below show wall thickness and a jumble of spreaders. Never assume just because it's carbon it's going to be lighter. Talking to riggers it's a common 'mistake', the carbon upgrade can turn out to be a heavier, albeit stiffer spar. Having sidelined that we found 54' of Lagoon 450 spar for 'not a lot'. That one is a big fat section and is a splice and lots of gear away from being a solution. Then along comes a gorgeous brand new but broken Swan 42 rig. Again that one would need 2 splices and a bunch or halyard gate/spreader and hounds re-configuration. To cut a long story short, we now have a rig that is within inches or being perfect in every department, just a few feet to chop off the bottom. More pictures when it comes out of the mast rack, just 200' away from TJ, some things just fall into place! Having the mast in hand is a real boost to this project, happy days!! Nearly forgot, check out the innovative cycle-powered beer cooling system. Just a mock up for now but it looks promising, ice will be a thing of the past on board!
  14. racinginparadise

    'Triple Jack' rebuild...FU Irma!

    OK, shade project mostly completed, we have more diagonals than 'My Song's' cradle! Working without shade is just a non-starter here, we now have a nice wind acceleration zone across the decks...shade with breeze! Now we are looking at getting repairs done before any tropical waves decide to get over excited. All that old tin has to come off if anything threatens but at least the lumber can stay and better still, there are sand screws all around the boat to nail her down. The fwd beam shot clearly shows where the 1" doubled up lines went clean through during Irma.
  15. racinginparadise

    'Triple Jack' rebuild...FU Irma!

    Not a bad Sunday Morning today. We managed to align the stbd sponson back into its original position. No roof yet, that will come next week, today was all about seeing her back looking like a trimaran again! We had all sorts of plans and advice on how to re-attach the sponson. The fwd beam was severed as a double wrapped 1" bow line ripped through during Irma. The aft beam connection fell apart as she was being moved post Irma. Between the two events we had plenty of 'markers' allowing us to accurately get it all back in place. The fwd beam is a GRP 'I' beam with box section walls. Unidirectional glass top and bottom 3/8" thick, walls approx. 1/4" We have decided today that it's best to do all the repairs in place. Access cut thro decks and aft beam, we'll be checking the port side too. More to follow as things progress.