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#1 26 Jul 2020 8:55 pm

SteveM
Member
Registered: 2 Jul 2020
Posts: 6

Building a Goat Island Skiff

Last time I spoke with the guys at Fyne Boat Kits they suggested I should write a build log - there aren't many GIS kits in the UK so this might help others in future. As I started in February this is a bit of "story so far" but I will try to update further progess weekly.

I ordered my kit in January - having studied the build manual for a few weeks before Christmas. I chose the GIS for several reasons, but the background is this: i have a Swallow Yachts Bay Raider which I've used for several small boat events, but one of those events is in NL (Dorestad Raid) and is on inland waterways with lots of bridges - the BR20 is a nice boat for open waters, but the mast-down/mast-up time is slow and it's hard work to row. I wanted a boat better suited to the Dorestad Raid and which I could solo sail at home. I had seen another GIS on the raid and been impressed by its look and sailing capability. and further research just confirmed my impressions. I also fancied a build-from-kit rather than buy a finished boat.

So when the kit arrived in Feb I opened the boxes and promptly went on holiday... ah well. Started properly 3rd week of Feb.
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I've been building in my garage and realised before I started that once I had the hull built there would be no room to work on the mast, spars, rudder and centreboard - so although the GIS build instructions have you build the hull first I did it in reverse: spars first, hollow mast, rudder & centreboard foils; then the hull starting with bulkheads and working towards a 3D hull. The fine weather in April really helped as I could work outdoors a lot of the time.
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Glassing the centreboard and rudder is interesting - the guide suggests suspending using a couple of nails driven in temporarily, but doesn't go into detail. I found a YouTube video of someone doing it and realised that I needed some string loops to hang the nails from -worked pretty well in the end.
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Then making the centrecase and on to joining the flat panels and scarf-joining long timber for gunwales etc.
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3D was achieved on 20th May.
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More soon....

Last edited by SteveM (26 Jul 2020 10:22 pm)

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#2 26 Jul 2020 9:37 pm

SteveM
Member
Registered: 2 Jul 2020
Posts: 6

Re: Building a Goat Island Skiff

After going 3D, next was turning upside down and fixing on the bottom. Dry fix first with gyprock screws, then I lifted & glued one end, screwed it down and lifted & glued the other end to make sure it stayed aligned. Rather than wait for the epoxy to fully harden I then turned it right-way up again and on to the delicate task of cutting the slot for the centrecase (nail biting! much careful measuring) and gluing the centrecase on. After that cutting and gluing the mast step & partner before gluing that in place.
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Then gluing the gunwale (had to be bevelled first - much planing!). All the long timber parts had to be scarf-joined; I joined the gunwale, inwale and gunwale-capping all at once (long parts again - had to be done before the 3D hull, as explained on the earlier post). At the same time I was putting seat support stringers in fore and aft.
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The inwale spacers are fiddly - cutting lots of 70mm blocks to be smoothed and sanded with some different sizes so that they would fit to/round the frame tops; also a longer one to be used to fix the rowlock sockets. To sand the curves I made a cylindrical block by stapling sandpaper onto a solidified foam roller that had been used for epoxy. Sanding was pretty tedious but worthwhile to get the shape.
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Along the way there were tank-tops/seats to cut to size. The kit panels are oversize so that they can be cut to the actual hull shape. I made that a bit difficult for myself by missing a few words in the text: 'do not glue these on yet' in relation the the arms on the bulkhead frames - I was working from the diagram and had already glued them on first. It meant some very careful measuring and cutting to fit the forward and aft tank tops. Done in the end but could have made it easier if I'd read the instructions more carefully

All the panels have to be epoxy coated (3 coats) - in theory wet-on-wet but the timing is difficult. While the epoxy gets tacky the foam roller starts to set so I've generally done 2 coats wet-on-wet, then sanded when it's set next day, then done the third coat - seems to work pretty well. It will all be varnished at the end so the epoxy finish only needs to be good, not perfect.

Last week I glued on all the spacers - which had to be done in four sessions as I only had enough clamps for 16 at a time (there are 31 on each side of the boat!) and then the inwales. Now it really looks like a boat! I have to keep reminding myself that there's quite a lot still to do.
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Last edited by SteveM (26 Jul 2020 10:28 pm)

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#3 9 Aug 2020 9:58 pm

SteveM
Member
Registered: 2 Jul 2020
Posts: 6

Re: Building a Goat Island Skiff

Well, two weeks have passed. Having fixed the gunwales and inwales I turned the boat over ready to trim the excess ply from the bottom and plane the gunwale.
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The outer hardwood strip is too close to the hull to allow use of power plane so it's all hand planing.
To trim the ply I wanted to use a power saw to take most of the excess off before planing and sanding. I made a marking jig using an example I saw online - really useful, and with the saw set at an angle it trimmed nicely.
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Then on to glass-taping the chine seams etc.
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A complication was that my original batch of epoxy was running out, so I ordered some more - and it looked different!
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A call to FBK confirmed my fears - not only is it different but you can't mix them, the activator is different too and it's more sensitive to getting the mix just right. My plan was to glass the bottom as I may sail in places with gravelly beaches so that needs doing as one job. There wasn't enough original epoxy so no choice but to use the new batch and weigh the quantities. To make life more interesting it sets up much slower than the old stuff - in some ways helpful in this hot weather, but disconcerting. I've been used to the mix going hard in 3-4 hours - the new stuff was still tacky after 5 hours! thankfully it did harden by next morning but it means less opportunity to do two coats in one day. Eventually the bottom was covered.
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Final job was to add the hardwood rails (no pics I'm afraid) before turning over again
Today was starting to fit the knees - much trimming and sanding, and I've decided to remake the stern knees as I'm not happy with the first attempt. Thankfully I have wood to spare!
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Last edited by SteveM (9 Aug 2020 10:02 pm)

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#4 27 Aug 2020 11:26 am

SteveM
Member
Registered: 2 Jul 2020
Posts: 6

Re: Building a Goat Island Skiff

The past couple of weeks have consisted of finishing details: knees, planing down the gunwales/inwales to the ply edge, making and fitting a bow capping piece. These are the stern knees - I decided I like curves more than straight edges (there are lots of different GIS knees to inspire!) so cut a card template for each side to get the shape I wanted. Needless to say there is small variation between the two sides, being hand-built, so two templates were needed. Then out with the power jigsaw to cut the rough blanks before finishing.
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After cutting I also decided a centre hole in each would both look nice and be practical - you can never have too any places to tie a rope on a boat! so holes were cut and smoothed.
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Next was planing the gunwales/inwales. I was able to borrow a power plane from a friend which took some of the effort out, but it's a careful process as the power plane can cut an unwanted groove if you don't keep it moving and the cutting width is less than the full width of gunwale and inwale so it needs many light strokes removing only a fraction of a millimetre each time. I'm pleased with the end result but I did finish with the sander towards the end rather than risk planing off the edge.
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The bow capping is a detail left to the builder - the manual simply says 'cap the bow' and again there are many different examples out there. I opted to glue together 3 layers of the hardwood used on the gunwale capping to be shaped and fitted - I figure that this is the first part of the boat to arrive so being hard is necessary! After gluing it needed to be cut and shaped to match the profile of the gunwale before epoxy coating and gluing in place.
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The end result, with the bow knee also in place and sanded down, looks pleasing. Some epoxy and varnish needed to finish it, but progressing well.
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#5 27 Aug 2020 11:43 am

SteveM
Member
Registered: 2 Jul 2020
Posts: 6

Re: Building a Goat Island Skiff

While working on the build I have seen many examples of finished boats. A small number have added side benches to the design. I know Michael is justifiably proud of the open interior of the GIS, but I'm no longer as agile as I used to be and sitting on the floor when not on the gunwale doesn't appeal. As a result I decided I would add narrow side benches. That required me to do some design/planning myself. I decided that 20cm width and following the curve of the hull would provide what I wanted, but as it's only 6mm ply it would need some stiffening and supports. In the end I decided to reinforce the edge of the bench with another layer of ply and make 3 triangular supports of 2 thicknesses for each side, as well as the end and hull support cleats. I worked out that a half-sheet of 6mm play would be enough and ordered that from Fyne Boat Kits when I got the paint and varnish I will need.
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The next challenge was how to hold the triangles in place while gluing. I had some offcuts from the gunwale timber that I didn't mind drilling for screws so opted to use them and clamp to some longer bits of timber to 'hang' the triangles from. This allowed a dry fit to check the shapes and fit to the hull before gluing in place.
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End result with the supports removed - ready to epoxy coat.
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How the finished benches should look - the undersides have been epoxied but not the tops in this pic.
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I'm happy with the result - the narrow benches keep the cockpit as open as possible while providing seating for the helm. Once epoxied and varnished they will match the rest of the hull nicely.

Last edited by SteveM (27 Aug 2020 12:04 pm)

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#6 27 Aug 2020 11:59 am

SteveM
Member
Registered: 2 Jul 2020
Posts: 6

Re: Building a Goat Island Skiff

One more important step: fitting the rudder gudgeons to the rudder stock and drilling for the hull fittings. Careful measuring required - I glued some offcut timber to reinforce the bottom fitting, and will cut another for the upper one. 20200822_094127-cropped.jpg
The centre line markings have all been removed by now, so measuring and marking on some masking tape helped me get the position of the holes to drill.
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In parallel with all this I've been varnishing the parts that will be hard to reach one I glue down the seat tops. This is contrary to what the build instructions say, but I want to be sure I've varnished over the epoxy and I don't think I could reach all the area around the mast step & partner with the top glued in place. Likewise the mid-bench will make it hard to varnish behind bulkhead three. So those areas are now varnished (no photos). I now have a week's family holiday so the rest of the finishing will have to wait a few days.

Last edited by SteveM (27 Aug 2020 12:06 pm)

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