Archive for the ‘Fitting out Kudu’ category

New floors

January 19th, 2011

Following from my previous post regarding the quality of workmanship at the Newbridge yard (here), I’ve now sorted the problem.

Kudu now has new floors, cut from 18mm marine ply (doubled up on the forward floor to match the previous piece).

woodwork

The doubled piece was bonded together using some magic 5 minute glue. It’s “safe for immersion in saltwater”, and dead strong. Within 5 minutes it sets, and after about 20 minutes, or a brew in the cafe, it’s ready for using.

corribee-floors

Job done. Well, almost. Epoxy takes a while longer to “go off” than polyester, but forms a much better bond, especially for areas that likely to be wet. The downside is I’m stuck near the companionway until it does harden (24 hours in theory, but it should be strong enough to withstand accidental taps in a few hours). The good news about West Systems epoxy is that it doesn’t smell anywhere near as bad as polyester resin.

I prepared the area with course sandpaper (and a sander), then cleaned it with acetone which most certainly does smell (quite nice in my opinion, but perhaps that’s echoes of a misspent youth). The floors have been bonded with two layers of 50mm tape in four places. This is twice the amount used by Newbridge, and epoxy is stronger to boot, so it should be ok, although I might mix up another pot and add a couple more layers depending on how it feels tomorrow. Epoxy is far too expensive to waste willy nilly, you know!

Anyway, that’s it. Job done, but although I’ve spent a day on it, I’ve got no further in overall progress. I suppose I have now got a much better “canvass” for installing the bilge pump in to though.

Bilge Pump: The final solution

January 18th, 2011

Right, it’s done. I’ve decided, and about time to since onkudu.com was turning in to a blog about nothing other than bilge pumps.

The previous “solution” I posted (here) was perhaps a moment of madness. While I could have got it to work, it was a complete mess of a job and served no place on a seagoing boat. Still, trying it, and seeing it, meant I could at least rule it out.

In the end, I’ve gone with what Ben suggested (see comments on this post), and put the pumps in tandem.

I initially dismissed that idea since it would mean a reduction in the size of the pick-up pipe for the manual pump: The manual pump uses inch (25mm) pipe, where as the electric pump uses 3/4 inch (19mm). I didn’t want a reduction because it would obviously hinder the flow of water, but having thought about it further, I’ve come to the conclusion that if 1/4 of an inch is going to make any sort of difference to a sinking boat, it will only be in the small amount of extra time spent afloat.

So, from bilge to seacock, the system now looks like this

  1. Whale Supersub 500 (35 litres per minute)
  2. 19mm pipe
  3. Non-return valve, which also converts from 19mm to 25mm
  4. hand bilge pump
  5. 25mm pipe to 25mm seacock exit via ball valve.

Kudu’s bilges are usually bone dry, so if this system is ever needed, I’m in trouble (or I fell asleep with the hatch open).

I just need to fit it all now, and before I can do that, I need to cut a new floor and bond it to the hull. Whoever fitted the original floor at Newbridge didn’t do a very good job with wetting the matting, and it didn’t pass Whitworth standards so I’ve removed it (I tapped it with a boot toe!).

Possible bilge solution

January 18th, 2011

It is a very handy thing to have a good relationship with your local chandlers.

I’ve just borrowed various bronze fittings to see if I can make up a solution to my bilge pump issue. If it’s workable, I buy what I need.

So, here it is…

seacock

So, in theory it’s ok but there are three problems.

  • I don’t like all that heavy metal clinging on to the seacock. It just seems like a poor job.
  • It creates a loop, so I’d need to fit non-return valves on each outlet to prevent pump straight back in to the bilges.
  • To get the various fittings lines up, I can’t tighten them fully. I’m not plumber, but I’m guessing PTFE tape will sort this problem out?

What’s the verdict? I’m not ever so convinced. I might have a go at arc welding two bits of pipe together to make a much lighter t-piece out of stainless. I’ve still got the loop issue though, and no matter what solution I go for I think I’m going to need the non return valves.

More jobs done (in pictures)

January 17th, 2011

The standard gimbals for the Origo Stoves are a bit naff and despite costing over £60, are not much good for mounting the stove in a small boat. They seem to have been designed to mount the Origo 3000 in place of  a full size oven. Since I imagine people buying the Origo 1500, or 3000 will not have the space for a full size oven, I really think Origo should offer a more suitable option to their customers. Perhaps I’m wrong; feedback appreciate.

Anyway, I decided I could do a better job, so set about butchering the £60 gimbals with an angle grinder, and making my own with the addition of a bit of Sapele.

Stove gimbals

Here you can see the two gimbals.

Origo custom gimbal

One side mounted in place using five screws.

Origo 3000

And the finished job.

I’ve also started making the new companionway step, which also serves as a cover for the sink. It was cut out of 18mm marine ply.

Corribee companionway step

And I came up with a nifty little design for it. The mixer tap you can see in the picture above, tends to drip a little. It’s not because of any leak per se, but as the water that remains in the tap neck dribbles out after switching the tap off. Also, I wanted to have some protection just in case it it got kicked on by accident, so I came up with this…

Tap drip catcher

This is obviously not finished, but it will be smoothed off, and a hole drilled in the bottom of the “pit”, which then allows any stray water to run along a small routed conduit underneath the step, and drip harmlessly in to the sink.

It’s just a small touch, but worth doing I felt.

Finished the hull insulation

January 12th, 2011

Two posts in one night!

I’ve got quite a lot done this evening, but the most exciting bit (at least for me) is that I glued the final piece of plastazote to the hull.

I’ve also replaced the ply trimmings in the boat. I used some rubber backed carpet tiles to finish them off, and the boat is looking altogether much more complete than she has been of late.

Boat insulation/carpet

Here’s a good shot for showing what I’ve done. On the left you can see the Plastazote insulation, and on the right the carpet tile that’s gone on top of it. Since the boat came out of the factory at Newbridge, the chain plate backing pieces have been covered in a layer of GRP, which I’ve cut away to expose the bolts. I did this in case I needed access to them for any reason. The insulation was then placed on each side of it, and the carpet tile was cut for a tight fit so that it needed no bonding in place. This means I can quickly remove it to get at the bolts. I can’t see me needing too, but I thought it sensible to have the option.

Corribee Cabin

And finally, the finished job.

Obviously I have yet to carpet the hull, but I’m still trying to work out which carpet is best to use.

More on Bilge Pumps

January 12th, 2011

This post may not make entire sense unless you have read the previous post, Lose the fridge.

The comments I received on the previous post warrant a bit of a further explanation of my plans for Kudu.

A popular suggestion (well, perhaps mentioned twice) was to fit a bilge pump in the cockpit so I could handle the boat as well as the pump in case of an emergency. This is a sound idea, and I may fit a small one in somehow, but the main reason I must have a bilge pump in the cabin is because I don’t intend to spend much time outside of it.

Having recently finished Mingming, Roger Taylor’s second book and one that’s entirely about singlehanded ocean sailing in a Corribee, I’ve made up my mind that I would feel safer if I too had a “padded cell”.

Mingming has no campanionway as such, with the washboards being replaced by a big chunk of wood (from an old table if I remember correctly from the first book), and the hatch being a Houdini deck hatch that seals the cabin and makes it a watertight capsule.

I’ve convinced myself that this is a sensible thing to do, although I will get some sea miles in with the modifications I’ve done to date before I make such a drastic change, just to make sure I can definitely sail the boat from the “hatch” position.

The ‘mind maker’ on this decision was the memory of the trip from Anstruther to St Andrews. There will be some footage of the sea I experienced off there on the OnKudu DVD (when it’s eventually finished), but suffice to say, it was a big sea, and Kudu took a lot of green water over the coachroof, which then made it’s way in to the cabin. It was by no means a storm, it was around about a force 7, but I’m fairly convinced that the sea was big enough to make even “big boat” sailors nervous.

If the boat were rolled, or involved in a sufficiently bad knock-down, then the hatch would let in masses amounts of water. Indeed, in a roll, I doubt she’d ever come back up again so I’d rather have the inconvenience of a non traditional companionway in exchange for security at sea.

Have I justified myself, or am I making a bad decision? I doubt I’m going to change my mind, but do feel free to try.

Lose the fridge

January 11th, 2011

There’s been a bit of a mind changing in the air at Kudu HQ.

I have spent quite some time working on my new fridge.  I initially spent spent a good while thinking about how to achieve cooling on such a small boat, I’ve bought a thermo-electric coolbox that I sourced on the internet, dismantled it, designed and build a wooden box to house it all, routed the cables and crimped the terminals at the switch panel, and I was about to start adding the insulation in the final run towards the finished product. I was proud of my home brew fridge. I was sure that I’d be the first Corribee owner to have a built in fridge on their boat, and perhaps a member of a very small number of people to have one of any sort of boat that’s just 20 ft and 9 inches in length. I’d even designed in a wire mesh so that the entire fridge would be, in effect, a Faraday cage and under the threat of lightning I could place the backup handheld GPS and VHF in to it for safe keeping, just in case we were struck.

Well, the fridge is no more. I’ve axed it. Put it on ice. Binned it as a bad job, and altered my opinion on the whole idea. I’m lucky with opinions I suppose. If something compels me to change my mind, then I will do so without any fuss or misguided clinging on to the desire to have been right in the first place.

I’ve been thinking about this for a few days now, and it all started with a book I was reading – The Greatest Sea Disasters. After reading a few stories in that, I once again picked up my trusty Heavy Weather Sailing manual, and began another run through it. I concluded I was being very unseamanlike with my fridge idea.

You see, because of the very limited space on Kudu, the only place I could put my fridge was in the space under the chart table where the sea toilet used to live. I’ve long since removed the sea toilet and filled the holes where the sea cocks where located, and now it’s just an empty space who’s only occupant is the amplifier for my on board stereo (oh, and what a mighty stereo I have made too!). It seemed like a sensible location for the fridge, but after all these tales of woe at sea, I began to realise that my bilge pump setup was dreadfully unsafe.

As part of the refit I bought an electronic bilge pump, a Whale Supersub 500, and that was my only means of pumping a flooded boat. This is all very well and good, but what if the battery is damaged, or runs flat. What if the bilge pump itself malfunctions? Such a failure could be very serious, so I began to ponder on where I could install a backup manual pump. There just isn’t anywhere, the boat is too compact, and so I realised that the only place to put a pump is in the space where the fridge was destined to go.

So that was it, fridge out, bilge pump in. The only issue I now have is how to get the water out of the boat. The electric pump is using the only sea cock, and I really don’t want to put another through the hull, so I’m wondering if I can get away with a Y adaptor. This is, as I understand, frowned upon, but I really can’t think of any alternatives at the moment.

Suggestions are welcome.

Boat insulation and reading

January 6th, 2011

I’ve been making pretty good progress on Kudu of late. The ongoing insulation project seems to be taking forever, but slowly, a bit per night, I’m getting the Plastazote stuck to the hull. It takes forever in these winter temperatures since I have to measure the area, cut the foam, offer it up, then trim as required (usually for protruding bolts), apply the water based impact adhesive to both hull and foam (a terribly messy job) then sit for half an hour with a hair dryer before it’s set and ready to bond the two pieces.

Nevertheless, I’ve almost grown to enjoy it. At least it’s a job a can do inside, and with the hair dryer going it’s lovely and warm.

The ‘outside’ jobs are being put off until the better weather arrives. I’m determined to get the boat back in the water during some point in March, so I’m hoping that there’s a decent patch of weather towards the beginning of it. Not just because working around zero degrees takes an awful lot of motivation, but because the jobs I need to do require a fair amount of epoxy work in areas that are structurally very important, so I don’t want to force the job in epoxy unfriendly temperatures.

There are a lot of little jobs left to do, but I can do them once the boat is back in the water if I have too. The things I can’t do is build my new rudder (properly for MK3), fit the Lewmar forehatch, and potentially rework the companionway in to a watertight hatch.

It’s just this weather and these short days. I do hate winter.

On the bright side, I’ve been reading an awful lot recently. I was lent “The Worlds greatest Sea Disasters“, which was published in 1969 and contains some harrowing stories spanning from the days of the East India Company, to modern (then) times. It might seem a rather morbid thing to read given my seagoing aspirations, but I’m of the opinion that if you learn as much as possible about how things have gone wrong in the past, you’re more likely to avoid the same fate yourself. That said, I don’t think Kudu will be encountering any icebergs of (prematurely) exploding black powder destined for India.

I’ve also got half way through Salamander Dreaming, which is a wonderfully lightweight and entertaining read about a couple selling their house in the 70’s, buying an old trawler and with their young children and a few equally amateur crew setting off to find a new life afloat, which the obvious problems along the way (well, it wouldn’t have been much of a book otherwise, would it). Apparently, so it says at the start of the book, the boat they bought was one of the Radio Caroline boats, but given that it was 96ft, and the smallest Radio Caroline boat was, if I remember correct, about 130ft, I think this is a bit of a porky. Still, maybe it will explain things in pages to come. I want to know what happened to their “go-go dancer” crew member. Actually, I want to see a picture of her… only to see what a “go-go dancer” is. Presumably a 70’s thing.

Electron control gateway

December 7th, 2010

Just had to make a quick post because I’m quite happy about what I’ve done.

Drying Deksolje

Firstly, I borrowed a 1500w heat lamp to help dry the Deks Olje in the -10 temperature outside.  For those that are unaware, Deks Olje is miracle juice. It does basically the same job as varnish, but doesn’t degrade in UV, and does a much better job of protecting the wood since it’s an oil and soaks in to the grain. I also think the matt finish gives whatever wood it’s on a much more natural look. If, however, you want a shiny (almost) varnished look, then you can complete the job with Deks Olje D2, which sets as hard as rock.

That said, it does take about 8 coats, and I lost patience at coat number 4, so it’s not as dark as it should be, hence not matching the wood above it in the following pic.

Corribee switch panel

…and there it is! The new switch panel in it’s new location. I’ll wait for a boring day with better weather and finish off the Deks Olje, but it’ll do for now. As you can see, there’s a BEP 6-way switch panel, my Nasa BM-1 battery monitor, and a bit of scrap stainless steel that I applied an angle grinder too. I used to be a bit nervous with metal working since it’s a rather brutal affair, but I’m getting used to it now, and to be honest, it’s quite easy to work with. Stainless steel is actually really easy to manipulate given the right tools. And what is this metal plate for?

Fuse access panel

It’s a fuse access panel :)

I have also provisioned a space for storing a full compliment of spare fuses since it’s almost certain that if a fuse blows, it’ll be when I really, really need whatever it’s providing power to.

Anyway, it’s not all finished, but I’m getting there. Maybe I’ll get some sailing in next year!

Boat Electrical Installation

December 1st, 2010

The electrical system on Kudu is coming along a treat. It’s the third, possibly fourth time I’ve attacked it, but this time it’s being done properly. Every single bit of cable is being replaced and rerouted, as well as the switch panel being changed for a (modified) BEP panel, and all the fudges have been removed (the chocolate block bus bar, for example).

I thought I’d post a few pictures, mainly to invite some feedback on what I’ve done, but also to show the progress in the hope it might help others. Note, this is still a work in progress, but sufficiently completed to warrant showing.

Behind the switch panel

This is the view behind the switch panel. The switch panel from BEP Marine is (was) a fused 6 way splash proof panel, which has had the fuses removed. I’ve used a proper bus bar for the negative feed, and each circuit is routed via a fuse panel. I decided to do this because blade fuses are available pretty much anywhere.

Inverter on a Corribee

Here’s a bit of an expanded view of the area, which reveals the inverter. It’s a 150w model from Sterling, and is permanently wired to a 230v outlet socket situated at the chart table. It will be totally out of sight when everything is put back together.

You can just make out the extra switch I added for the inverter. I ran out of space on the switch panel so added and extra individual toggle switch. This is of course wired via the fuse panel.

Boat battery installationThe boat battery installation includes a master on/off switch, via a main fuse. Of course, the fuse is wired before the switch.

The fuse holder is actually an autoleads product from Halfords and designed for high power car audio installs… it does the job, and looks the part.

CrimpersA final picture, more aimed at people new to this sort of thing (as I am). These are a pair of ratchet crimpers I’ve borrowed, and produce a much more accurate and safe crimp than the cheaper sort you’ll find in most DIY shops.

I was told of a couple of chaps in Preston that have worked for British Aerospace, that if I was caught crimping terminals with the crimpers I had, I’d be kicked off the job at BAE. I trust the aerospace industry to get these things right, so it was advice worth listening to.

Well, that’s it. Hopefully I’ll have it up and running within a week. I just need some better weather to finish off the required woodwork.