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Eun Mara Builders Discussion

^               1825-1840 of 1840  1809-1824 >>
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.
1838
Ian Milne
06-25-2018
04:59 PM ET (US)
Thanks, Steve. I haven't got my copy yet. I'll look out for it.
Under power, we were pushing water at 5.4 knots, so we usually motored at 4.5 - 4.8 kn, but she could sail at 6 knots under the right conditions.
Ian
1837
Steve B
06-25-2018
02:04 PM ET (US)
This month Wooden Boat Magazine (July 2018) has a nice article about a voyage across Scotland on an EM. Ian Milne gets quoted a bit too. A couple of small editing issues (pretty sure the boats hull speed isn't 6.5 knots) but overall a pretty nice write-up. And a good looking boat too.
1836
Ian Milne
05-20-2018
07:32 AM ET (US)
We got a single-axle trailer for "Islesburgh" because we had found that a tandem trailer was hard to manhandle. It had 13" wheels to start with and the end of the rudder hit the ground too easily, so we got 14" wheels put on it, with stronger springs and tyres. It was OK after that. Our trailer-maker was very reasonable about it. The new tyres were rated for max. load of 850kg (each), so the total load was almost at their limit. I recommend a tandem trailer. We have a tandem now for my Kotik and it is easy to manhandle at home if I take the back wheels off. The brakes are on the front wheels. We got the trailer early so I didn't need to build a cradle for the hull after turnover. We turned it over straight onto the trailer. You can see it on (google) <woodenboat forum kotik kotik kotik>. (We had a tilting boom on our EM trailer too, but it was not necessary.)
Ian
1835
Steve B
05-20-2018
12:18 AM ET (US)
Ian Milne had a very nice looking trailer built for his boat, I copied a few design elements when re-working mine. You'll want to get the boat as low as possible.

The EM at 1200kg/2600lbs fits between readily available (in the US at least) trailer load ratings. Lots of stuff at 2000lb and then a big jump to 3500. They are also mostly set up for powerboats with the axle set pretty far aft to counter the weight of the big motors hanging off the transom. I know I've got way too much tongue weight on mine but have put up with it because my annual trek to the local ramp is only a few miles each way. 18 months isn't that far away, start looking now.
1834
Stephen Becket
05-19-2018
12:24 AM ET (US)
Steve B. When I got my plans from Iain I also got a sketch of a trailer. It is double axle. I’m not sure if I can post it here but if you’re interested I can send you a copy by email.


My plan is to use the boat as a trailer sailer and will be dragging it out of the water each time. I have been contemplating having a telescopic tow bar so that I can keep the car out of the water when launching etc. but that is still 18 months away for me, at least!
Edited 05-19-2018 12:27 AM
1833
Ian Milne
05-17-2018
08:55 PM ET (US)
Fair enough!
1832
Steve B
05-17-2018
08:04 PM ET (US)
I have a copy of the Watercraft issue with the trolley in use and got the same drawing from IO. I've been using chest waders with my "real" boat trailer, they are fine until you bend over too far and then fill up fast!

If I had to launch the boat more often than annually I'd simply refine my existing trailer a bit but it seems like twice a year I end up renting a utility trailer to haul stuff past the useless boat one.
1831
Ian Milne
05-17-2018
05:16 PM ET (US)
Hi Steve, The plans for my Eun Mara included a sketch design for a trailer with a separate trolley that you would push under the boat in the water and then pull the whole thing out onto the the trailer. That was for Brice Avery, the instigator of the EM design, for launching and retrieving on shallow beaches on the west coast of Scotland. He wore chest-high waders to do it. It is described in an article in one of the early "Watercraft" magazines. Alec Percival (one of our original group) started using his EM "Heather Mary" with a general-purpose trailer and a separate trolley. Bob Lewis and I were with him when he took her out of the water at Goolwa S.A. after the boat show there in 2007. He got quite wet. He had a boat-trailer made after that. There are photos on Richard's website. I'll send you some more.
Ian
1830
Steve B
05-17-2018
01:53 PM ET (US)
Thanks, I though the all-up weight was about 1200kg. Because I don't have enough to do already I've been contemplating building a boat-dolly so I can get rid of the single-use boat trailer I have for Marianita. She lives in the water, only coming out for a couple of weeks each year for paint and varnish work easier done on the hard. A nice flatbed trailer I could put to good use, the boat-only one serves as a low trellis for invasive blackberry vines the other 50 weeks.
1829
DaleHPerson was signed in when posted
05-16-2018
09:42 AM ET (US)
Re: The Wiki pages. Turns out they were not gone after all but I did note that version of the scripts I was using was still the original from 2007. Can't imagine why its not supported anymore. This week/weekend is "non-stop busy" for me but I will try to reinstall/restore the Wiki by the end of next week. If that doesn't happen please nag (remind) me as I do tend to forget stuff.

Dale
1828
Ian Milne
05-15-2018
05:14 PM ET (US)
P.S. I raised the boot-top later, when I repainted the hull, up to the lower edge of the next strake. I think Alan did that too. I have done the same on my Kotik.
Ian
1827
Ian Milne
05-15-2018
05:12 PM ET (US)
Hi Steve, Richard, and Dale,
When we came back from one of our cruising trips in EM "Islesburgh", before we unloaded her we put her on a weighbridge and the weight of boat plus trailer was 1600 and something kg, about the same as Richard's. That was with our cruising gear on board, but no fuel and not much food. The tare weight of the single-axle trailer was 375 kg, as I recall. "Islesburgh" was built with 9mm 7-ply hardwood plywood on a tatajuba hardwood centreline (but not fibreglassed), so she might have been a bit on the heavy side. If anybody is ordering a trailer, the figure to consider is the displacement. The "weight" figure that Iain gives just represents the bare hull. I wrote to Iain about it at the time. Our trailer broke a spring at one stage, so the maker strengthened the suspension and it was OK after that.
My new Kotik trailer is a tandem, like Richard's.
Ian
1826
Richard Almond
05-15-2018
03:23 AM ET (US)
Hello Steve, you chose an opportune moment to ask about weights. I took delivery of a new Jeep Cherokee a couple of weeks ago and had planned to take a trip to the weighbridge today, which I have just done, to see how much I was going to be asking it to tow. To cut a long story short the weight for the boat, including all spars and rigging, was 1145kg. However, remember that Skerry is a heavy boat due to eight batteries (270kg) and high density timber (jarrah and spotted gum) for the backbone.
In case anyone's interested, here are the readings:
Observed weights from WB:
1. Jeep - 2200kg.
2. Jeep with boat, trailer and all spars and rigging - 3880kg.
3. Jeep off the WB, trailer (still connected) on the WB - 1500kg.
Derived weights:
4. From 1 & 2, weight of boat & trailer = 1680kg.
5. Tare weight of trailer (from sticker on frame) - 535kg.
6. From 4 and 5, weight of boat - 1145kg.
7. From 4 and 3, weight on tow-ball - 180kg.
Comments on arithmetic and reasoning welcome!
Richard A
1825
DaleHPerson was signed in when posted
05-14-2018
06:26 PM ET (US)
Thanks for the heads-up on the wiki, Steve. I had some trouble with my web server for a bit now. I'm looking in on it. Looks like the directory is still there but it seems the content is messed up or gone. Don't know which. Hopefully it's all ok. I'll let folks know what's up when I figure something out.

Dale
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