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Eun Mara Builders Discussion

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1854
Ian Milne
09-05-2019
04:00 AM ET (US)
That sounds pretty much like what I did, except the bulkheads. See my part of Richard's website <https://www.geoss.com.au/eun_mara/ian_dune...date_10_dec_2005>;, <http://forum.woodenboat.com/showthread.php...tik-Kotik-Kotik!>; and <http://forum.woodenboat.com/showthread.php...+Mara+gaff+yawl.>;
BTW, Alistego.com is by Dale, not Dan.
Ian
Edited 09-05-2019 04:12 AM
1853
Stephen Becket
09-04-2019
04:25 PM ET (US)
Ian and David, thanks for the encouragement!

Yes David, I have incorporated the laminated frames and plywood bulkheads into the moulds so that they will be glued in during planking. I thought that installing them afterwards would be nightmarish! I installed them for two reasons, 1. For ease of installation and alignment, and 2. To add extra stiffness to the moulding during planking. The uneven tensions on the moulds, planking each side alternatively, could lead to a ‘wobbly’ boat if the frame is not sufficiently braced. Mine is well braced but the forces are capable of pulling it out of alignment.

I had contemplated putting in the floors before planking but thought this would be better done after the garboards were in. With the floors in I am thinking of installing the keel, with the exception of the outer stem and stern, before I continue planking beyond the garboards. As the keel will be made up of three laminations splicing the ends in to ensure strength can be easily done. With the floors in I can incorporate the keel bolts into the build easily and working with only the garboards there it means I can work inside, and outside of the boat, conveniently. This is important as I’m working on my own. Obviously the ballast will be fitted afterwards when the boat is right side up! However having everything ready may make it easier to get the ballast cast correctly to fit my requirements.

The other advantage of building the keel early is that it will add stiffness to the framing during planking.

There is a great temptation to get the planking done as soon as possible but I am trying to think ahead of myself to save effort later.

I have been studying Richard from Canberra’s and Dan’s Alistego blogs to pick their brains!

Any suggestions, gents?
1852
David Handron
09-03-2019
10:49 AM ET (US)
Congratulations, Steve. I'm glad to hear of another Eun na Mara being built!

I would suggest that before you begin planking, you consider making the laminated frames and floors, and building the planking around them. I didn't start that way, and I'm not looking forward to fitting everything in when I turn my boat over.

When I started (too long ago!) I had only Oughtred's "Clinker Plywood Boatbuilding Manual" to guide me. In that book, Iain suggests just what you've done. Looking at a number of build threads on the Wooden Boat forum, there seems to be a lot of advantages to including as much of the permanent framing as you can before you start planking.

However you proceed, I wish you the best of luck. I'll enjoy hearing about your progressd. Who knows, maybe I'll even get back to my own project.
Edited 09-03-2019 10:50 AM
1851
Ian Milne
09-01-2019
03:34 AM ET (US)
That sounds great, Stephen. You're well on the way.
Ian
1850
Stephen Becket
09-01-2019
02:49 AM ET (US)
I have started my build in earnest. Over the last few days I’ve built the frame and installed the moulds. The laminated stems have been sanded and cut to size and planed down ready for the keelson. The laminated frames have been sanded and the edges routered to give a smooth finish and have been fixed to the moulds. The keelson has been laid in the moulds and I’m making sure that they are properly aligned and everything is correctly centred before gluing them in place tomorrow. After that I start the planking. The foundation work I did and the hours of thinking are paying off!
1849
Ian Milne
08-29-2019
03:57 AM ET (US)
Yes, that must be right. 5 would be possible, but a crowd! I would rate her as 1-2 for overnighters.
Cheers, Ian
1848
JeremiahBoPerson was signed in when posted
08-29-2019
12:36 AM ET (US)
I saw day sailer 1-5 on one of the plans online, I must have confused it for a rating, but it probably means 1-5 people for daysailing.
1847
Ian Milne
08-27-2019
04:29 PM ET (US)
We did some trips on the coast here (NZ), and I did one of them with a guy who said he had sailed all over the Pacific, and he said EM Islesburgh was very seaworthy. I thought so too. She rode well, in many different conditions, on lakes and the sea. I wouldn't take her out on "blue water"
(open ocean) though.
Of the EMs I have seen, "Eun Bhan" (the late Frank Robson) and "Mary Way" (Alan Hosler) have the same tiller linkage system as the prototype, "Minna" (Brice Avery).
What is a day-sailer 1-5? Whose rating is that?
Ian
1846
JeremiahBoPerson was signed in when posted
08-26-2019
09:14 PM ET (US)
Hello Ian, Thanks for that. I have no intention of crossing the Atlantic on an EM but just questioning her sea worthiness. I much prefer the EM over the Grey Seal. The Grey Seal looks like another folk boat to me. I haven't seen anyone do the original rudder configuration as the first EM, any idea why that is?
1845
Ian Milne
08-22-2019
04:43 AM ET (US)
Hello Jeremiah, I'm not sure what you mean by day-sailer 1-5. Yes, the Atlantic has been crossed in smaller boats than the Eun na Mara, but it depends on how masochistic you want to be, in my opinion. Also, the boat has to be big enough to carry all the gear and food you need. Do you mean for one person or two? According to the catalogue, the Grey Seal is the only one of Iain's published designs considered suitable for open water. The longest trip my wife and I did in our EM Islesburgh was six weeks, with landings most days.
Ian

Incidentally to Stephen Becket's message 1843, kwila is not native to New Zealand. Sorry, Stephen. I use it too.
1844
JeremiahBoPerson was signed in when posted
08-21-2019
05:16 PM ET (US)
Hello! I'm new to the forum and the Eun na Mara has really caught my eye. I understand that it is rated as a day sailor 1-5 but how comfortable would you be as a blue water boat? I have seen people cross the Atlantic in small boats such as this before, but would the lapstrake technique be a cause of concern as far as offshore cruising?
1843
Stephen Becket
04-27-2019
05:22 PM ET (US)
Hi, Steve B. Sorry for the delayed reply. The ‘Boss’ told me that my plans to build the boat were premature! Sure enough this last year has been filled with home renovations and garden work. We recently bought a lifestyle block outside Warkworth, New Zealand. However having the boat plans has been a constant reminder to do something and home renovations have honed my carpentry skills! So far I have decided the original building space was inappropriate because it was in the workshop and with so much else going on it would have got in the way so an additional ‘carport was built onto the garage/workshop and the floor concreted to give a smooth level surface so setting up the jig should be more accurate. I have, however, done a fair bit of laminating. I use Bote Cote 1:1 epoxy glue (which I mix in one of the wife’s silicon cake moulds - when it hardens after the job, you just invert the mould and the dried glue peels off ready for reuse!). To date I have laminated the inner bow stem and used that, covered in cling film, as a form to shape the outer stem. I found that by keeping the inner one in its original mould while forming the outer stem the spring out you get from releasing the lamination was such that they have a perfect fit! (I hope that makes sense!) I have formed the inner stern stem the same way. The ribs on number 3 and 4 frames have been formed. I tried to be clever on number 3 frame and cut the timber strips to slightly larger than finished size but after trimming they are too thin so will have to do remedial work on that, probably thicken them up by adding strips to the interface because there will be severe shamfering required on the forward face to allow the planks to turn in towards frame number 2. One issue I had with laminating was trying to laminate the whole thickness in one go. If the strips aren’t absolutely parallel they try to squeeze out sideways when yo apply the bending pressure. I found this was easily controlled by laminating 4 or 5 strips at a time and building up that way. No problem if you have the time, is easier than beating the strips back into line or ending up with an array of clamps impersonating a hedgehog! My next job is to prepare the floors as I thought I might put those in place with the first strip of planking because of the severe bending required. However soon I shall set up the jig in the new building area (currently being used to store timber for other projects due to be finished soon) and I look forward to building the hull. I am using a native hardwood called kwila for the keel and ribs. It is used here for verandah decking and relatively cheap. It is quite stiff as laminating strips have been cut to 5 mm thick, which means a bit of extra glue is required. I find Bote Cote ( made in Australia) very good and easy to use. Just mix it up and spread it on like sift butter, very little dripping or running. It sets hard and I’ve used an electric plane to trim off the hardened excess but now wipe off the excess before it sets. ( another advantage of laminating in thinner sections rather than the full thickness in one go). Kwila is known for bleeding when wet but as I shall be giving it all a coating it shouldn’t be a problem. I redid our kitchen bench top by removing the Formica top and replacing it with a Kwila wooden top, gave it a few coats of Danish Oil and it is hard wearing and does not stain so hopefully it will be the same on the boat. I’ll let you know how I go with the next phase of the boat. Who said retirement was a time for relaxation?!!!
1842
Ian Milne
03-21-2019
04:00 PM ET (US)
That sounds good, Steve.
We launched our Kotik on 10th March, and took her to a classic boat rally on 17th, before our summer runs out. We have named her "Kotik". It's short, and easy to pronounce. She floated, and steered well, and the motor ran, so all is good so far. Now she's back in the workshop to be finished properly, as long as it takes. (You can see her on my WoodenBoat thread "Kotik, Kotik, Kotik!"
We were pleased to have a visit from Ron and Liz Binet of EM "Lizzie 3" in early February.
Ian
1841
Steve B
03-21-2019
12:52 PM ET (US)
Crickets around here.
I wonder how Stephen Becket is coming along with his build.
Still no Wiki pages, a loss for future builders for sure.

I had a lovely sail yesterday, first day of Spring and it was a beautiful sunny day. Opting to stay in the harbor really shook some of the winter rust off, the relatively limited space means lots of tacking and the wind tends to be shifty so you really have to pay attention. We had everything from becalmed to reaching at 5.5+ knots according the GPS. A good start to the 2019 season!
1840
Ian Milne
06-26-2018
05:53 PM ET (US)
Our GPS indicated 10 knots over the ground (GPS) one time, with everything pushing us!
1839
Steve B
06-26-2018
11:05 AM ET (US)
I've been over 5 too, past 6 surfing downwind a few times but not very often.
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