First Rib purchased, now the rebuild starts !! - Page 3

ribsta · 21 July 2015, 11:29

There should be a 'LIKE' button! I've had 2 x Ocean Ribs in the past so I watch this one with Interest!

MAC1010 · 21 July 2015, 20:23

Thanks, glad my ramblings are being read and the photos looked at.............

Onto the work, so you can see the tank compartment looks shiny in this pic, thats a "hot mix" of the specialist resin to seal the surface, this is followed by a basic lining of two 600g csm and really soaked out to make a resin rich layer (not how you would normally laminate but this is to create a fuel proof layer and is not really structural even though it does add something to the structure)

Have cut out the new fuel tank baffles and the top of the fuel tank from the panel that I made the other day. I normally have lots in stock but at the moment I am just waiting for some more of the specialist resin so I can glass over the curved edges of the baffle plates then glass them into the tank space.

I was going to leave the rest of the deck till the tank part is done and deck fitted but i had to cut out a little bit more round the front of the console so I could get some smaller bulkheads fitted and get the bulkhead top onto the forward fuel tank bulkhead ready for the deck. In one of the pics you can really see the total de-lamination of the deck, the plywood laying on the hull leaving just the skin of GRP in place.

I got a couple of the smaller bulkheads cut out and trial fitted, still 6 more to do in this area where previously there was nothing !! and bulkhead tops for all of them. If I get time I will get the rest of these cut out and dry fitted tomorrow along with the bulkhead tops. Then I can trim back the edges of the new structure I have already fitted fill the gaps and join this all in with the new small bulkheads.

MAC1010 · 25 July 2015, 08:21

Still no resin to finish the fuel tank so I continued with the smaller bulkheads to give extra support to the deck and hull.

I put them in as a dry fit then using hot glue fixed them into place so I could put a radius on the joints (gravicol this time as crestomer is not required for this job). Once that is done they get glassed in with strips of 2 x 600csm.

Solid 9.5mm GRP plates are then cut to size and dry fitted as bulkhead tops, this helps to spread the load on the joints between the hull and deck. Creating a really robust structure.

MAC1010 · 25 July 2015, 08:24

Might help if I actually attach the pictures !!

Mollers · 25 July 2015, 09:29

I can't help but think, that if someone less diligent/brave/skilled than yourself had bought this rig, what a sack they would've been taking their family out in.

MAC1010 · 26 July 2015, 08:29

Mollers, yes you are right nothing other than a complete rebuild would have saved this rib. It was in a dangerous condition and there would not have been a "cheap easy fix" that could have sorted it to the point where you should even consider going out to sea. Unfortunately it all stems from how the rib was built from new as the design and construction methods throughout the boat had flaws that meant this outcome was inevitable.

I have been looking at the console over the last week and have decided that there are too many problems and ways that I can re-design it so the functionality and ergonomics are much better let alone the actual quality of the existing moulding. As such I will make a new plug and mould for my own version

gtflash · 26 July 2015, 08:38

What material are the bulkhead cores? I presume you are going to use a vinyl ester resin for fuel areas?

MAC1010 · 26 July 2015, 10:17

GTflash, correct the resin is a type of Vinylester but I mix in some other "secret ingredients" as well 😷 😀

Quick answer is a form of plastic honeycomb core but the material I use is a stronger "heavy duty" version of any other grade of Nida and the factory in France makes that specifically for us.

gtflash · 26 July 2015, 10:38

So are you going to ditch the ply decking, and stick with the modern materials throughout? Very impressive work. I'm 3 years into a restoration to get not far away from where you are already

MAC1010 · 26 July 2015, 11:16

Yes all of the plywood and timber is going, there is no need for it. What I am fitting in its place is stronger, lighter, has sealed cells, will not soak up any water and no rot at all. Also because of how much of it I purchase from the factory each year it is cost effective for me to use it however even if it was more to purchase I would use it instead of even the best of marine plywoods. Don't get me wrong I wouldn't use just any core instead of Plywood, pretty much all types of foam for instance is in my opinion a complete waste of time as over the life of the boat you can end up with fracturing through the core material as well as increased risk of de-lamination from the surface when shock loads are applied. I have found through quite extensive use of core materials over the years that the one I have is by far the most durable.

Well yes I only manage to get the odd hour here or there to spend on this project, If the resin had turned up so I could finish the tank space this week I would have already had the deck down in this section but that will have to wait till after next weekend now. Trouble is once I pick up a Cengar the "Red Mist" descends and before you know it I have a whole load of extra work to do because I know I can do a better job if I do it myself

Neil Harvey · 26 July 2015, 13:30

Mollers you are of course right, but if Mac hadn't have bought it, I would have. Glad I didn't, as I had got a quote for a new modern core deck. And that wasn't cheap. But it never would have got to sea in a non seaworthy state, as I would have stripped it all myself and paid the significant sum for a pro underdeck and deck rebuild. Glad someone who can do it all themself got it before me though, seeing how bad it all was.

willk · 26 July 2015, 14:05

Whatever about the deck etc., being rotten - I was a little surprised/shocked to see just how little strengthening was under there! More like the job now

It's a fascinating thread - MAC1010 is patently a very experienced professional - is not every day you see the results of one pouring time and money into a personal project.

Mollers · 26 July 2015, 14:45

Quote:

Originally Posted by Neil Harvey

But it never would have got to sea in a non seaworthy state.

Not in your's or MAC's hands, but the likelihood was, that most others would've given her a cursory tart-up at best and set to sea.

Pikey Dave · 26 July 2015, 15:46

Quote:

Originally Posted by Mollers

Not in your's or MAC's hands, but the likelihood was, that most others would've given her a cursory tart-up at best and set to sea.

The sad thing is, if MAC comes to sell it he'll struggle to recoup his money, let alone make a profit. Most punters don't give a toss what's under the deck, let alone want to pay for it. As long as it's got stripey seats & some bling on the transom they're happy. It's a cracking project & one of the very few project threads I can be 4rsed to follow, keep it up

Mollers · 26 July 2015, 15:53

[QUOTE=Pikey Dave;687658 As long as it's got stripey seats & some bling on the transom Nos is happy. [/QUOTE]

True.

ShinyShoe · 26 July 2015, 16:12

Quote:

Originally Posted by Mollers

Not in your's or MAC's hands, but the likelihood was, that most others would've given her a cursory tart-up at best and set to sea.

I dunno what this lad is up to...

...he seems to be chucking all this fibreglass about the place and is now waiting for more of the stuff to be delivered. Surely he could just have had a delivery of DuckTape(TM) instead

MAC1010 · 26 July 2015, 21:09

I won't be selling it anytime soon and am not doing it to make a profit on this particular rib but I expect my total cost including buying it will be in the region of £10k (obviously my time is not included in this) and I really can't see me spending more than that. There is lots more to come with this project and some very interesting prototype systems we have designed will be fitted to be tested on her.

As an example of just how bad the original hull strengthening was it turns out that the half round longitudinal hull strengtheners are just in fact the cardboard tubes that the fibreglass mat came on when they laid up the hull !!!! and instead of throwing them in the bin like anyone with half a brain would do they used to cut them in half, stick them to the hull and then glass over them !!! you couldn't make this S**T up !!!!!!!

Mollers · 26 July 2015, 21:16

Quote:

Originally Posted by MAC1010

.... you couldn't make this S**T up !!!!!!!

"Manufactured by a company well known for its quality and high specification boats and fittings, the OCEAN RIBs have been rigorously tested and developed to ensure a safe, stable and dry ride."

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willk · 26 July 2015, 21:26

Quote:

Originally Posted by MAC1010

As an example of just how bad the original hull strengthening was it turns out that the half round longitudinal hull strengtheners are just in fact the cardboard tubes that the fibreglass mat came on when they laid up the hull !!!! and instead of throwing them in the bin like anyone with half a brain would do they used to cut them in half, stick them to the hull and then glass over them !!! you couldn't make this S**T up !!!!!!!

Oh man - there's gonna be a few unhappy Ocean owners out there reading this....

MAC1010 · 26 July 2015, 21:29

I can't imagine that they were all built like this surely? otherwise there would have been more horror stories than just this by now?