DRAGONFLY Trimarans User Forum

EarthBM

My recollection is that there were only two versions of 920 - think "racing" wasn't something marketed by Quorning as a separate model. I think owners themselves probably added some sporty equipment and designated their boat as "racing". 920 is the only Dragonfly where "extr...

EarthBM

Hey John, the memories fade but I think there was a white nylon rectangular bar attached to the board that straddled the width of the trunk and prevented the downhaul line from sliding between the board and the trunk.

EarthBM

TC, did you tension /adjust the water stays much? Do you happen to have some pictures?

EarthBM

Thanks!

I wanted the Net-sys dyneema nets, but just don’t have the skills/time to saw/lash/design the perimeter properly. ATN makes a finished product in the right dimensions/geometry, ready to install.

EarthBM

The single best safety upgrade I think.

Etienne at ATN sized a polyester open mesh for my 35. Somewhat tricky with the bolt rope hull attachment, needs those individual sliders.

EarthBM

The cruisers forum thread is as comprehensive as you’ll get. Not many Df1200s have circumnavigated because not that many have been built. I for one would have no problem going around the globe in my DF 35, if I had the time.

EarthBM

Another turtled DF28: https://m.youtube.com/watch?v=8u0wP1mP7v8

Here it looks like attaching a bridle to the ama and main hull bows and towing it over the stearn could right it at sea. And this was the water has the clear escape path from the cabin.

EarthBM

Ditto

EarthBM

Feels like hiring an excavator to deepen the bottom could be a good investment

EarthBM

You probably have seen http://dragonfly.dk/trimarans/previous- ... onfly-1200

EarthBM

Thanks Mika, looks like a good improvement.

EarthBM

Great idea about the second rope! This way it will also give the signal that the first one broke (when the rudder slips aft)! Thanks Mika! One-off rudder? Just higher aspect ratio or something else? Have you considered adding winglets? I asked about them here: http://forums.sailinganarchy.com/index....

EarthBM

I am thinking about that. What diameter Dyneema do you use? Do you use thimbles and splicing to preserve breaking strength or just oversized rope? At least on the 35 it goes through a 90-degree bend in the pipe and would rub against it (no way to have a block there). I guess the pipe is smooth enoug...

EarthBM

I got a couple splintered strands in the cable that connects the rudder itself to the downhaul line. So remembering Larry's advice I want to replace it, but the eye fitting doesn't get through the 90-degree elbow in the metal tube. I could just cut the cable and replace it with one that has one of t...

EarthBM

I found the diagram, don't know how to post though. Email me at my username at gmail and I'll send it to you .

EarthBM

There is a diagram in the printed boat manual. It is fairly straightforward with the lines in red and green. There is a hole at the corner of the board. The line enters it and then there is a round opening in one of the sides. Not unlike some IKEA furniture. You tie a knot and it resides in that ope...

EarthBM

if your winds are <12 knots half the time it makes sense. If they are <9kt you can use Code 0 cloth, otherwise heavier.

I Used Randy Smyth designed screacher. You are probably looking at something like $5000 for df28

Check threads in the DF 35 section

EarthBM

I've heard some accounts of how a more stretchable rope (nylon) works better because it absorbs shocks via elasticity rather than slippage. But in general this should not happen. My rudder had to be faired with sandpaper because it did not fit perfectly into the cassette. I pull really hard on the r...

EarthBM

Are you zipping up the sails when not in use? 3 seasons for Technora sound like something is not done right.

EarthBM

Saw it in this http://www.yachtworld.com/boats/2011/Qu ... xAG5fDEynM listing.

Mine has gone totally opaque, perhaps from Port of Long Beach diesel fumes.

EarthBM

Fort Lauderdale -- neighbor! Can't answer directly, because I haven't, but also would chip in that you don't need it. The inside space is simply not big enough to spend a lot of time there. Having said that, the heater system works pretty well, so the ducts are there, no reason one can't put A/C in.

EarthBM

Yep, this is what the owner of another DF 35 Tri Vector did. Cost $12k Oakland - Miami.

Use tax alone on buy/sell transaction will be more than that. Hence I was just thinking shared use / swap.

EarthBM

Yep, this is an option, although feels wrong -- sailing it over is much more in the spirit of it! Sailing it down from Seattle to LA (with our own Steve B!) was one of the weeks in my life that I still look back to fondly. Things look pretty shallow around here and in the Bahamas -- perfect for a Dr...

EarthBM

So I moved to a new job in Boca Raton, FL, and miss my 35 on the west coast. One solution is to sail it down to Panama and then up to Florida. The problem of course is that from Panama it's uphill motoring mostly, as far as I can tell. (and I have a job where I can only take one week vacations far a...

EarthBM

Ivan, pics: Yes. I've a big picture view, but no details as I'm still working out how to finish the edges. Please click on any of the photos to see them enlarged! http://www.dragonfly-trimarans.org/images1000/net1_s.jpg http://www.dragonfly-trimarans.org/images1000/net2_s.jpg Thanks for these -- se...

EarthBM

Virtual copy/paste of my table from another DF 28 capsize thread... the last line shows the "righting moment index": 28S is two times less stable compared to 35T.... the 28 was built to get under 10 meters when folded to get away with registration and tax in some Euro countries. Here is my...

EarthBM

Thanks for the good detailed report!

Could you post pictures of the Net-Systems Ultra Cross trampoline?

EarthBM

or can just execute a regular jibe properly... dead downwind is a pretty mellow place... get to ~160 apparent wind angle, bring the mainsail dead center, both traveler and mainsheet, jibe to 160 apparent on the other side, bring your genoa over, release the mainsheet, move the traveller where you wa...

EarthBM

right, forgot about the hard windshield on the 1000 (1000 is the best looking DF in my view, in part because of that screen and the scoop aft of the traveler.) Very keen to see your result with the nets. I simply can't allocate enough time to the project (restitched the nets with Tenara meanwhile, p...

EarthBM

Great blog!

How did you source the polycarbonate screen ? Looks great.
Did you stitch it to the old dodger?

Bookmarked the blog!

EarthBM

I would really like to replace factory trampolines with more open mesh:
http://dragonfly-trimarans.org/phpBB/vi ... .php?t=620

So far this is just a project in my head. But with some threads giving up I may actually try to do something about it later this year

EarthBM

Thanks, but how do you attach the block to the mainsail headboard -- with a rope shackle?

EarthBM

Mika, does your Dyneema halyard not slip through the clutch? (which do you have -- Easylock or Spinlock?)

The Karver block look neat -- do you have a pic of how you attach it to the sail? Does the halyard not get out of the groove when the rope is loose?

EarthBM

After the tank was empty for a few weeks, the sensor is sending readings al over the place, including twice the tank capacity (eg 200+ liters).

Does anyone know how to reset/recalibrate it?

EarthBM

Can report good experience with contacting BSI directly (bsidk.com -- marine -- contact). Bought 10 outside handles at $8/each plus shipping.

BSI part XO2206731

EarthBM

I am thinking http://www.defender.com/product3.jsp?pa ... id=1568522

$54/pair

Just need to look at it in person to make sure I understand how it will fit

EarthBM

Outside handle... $35 for a single piece of plastic... These custom parts are ready for 3d printing... http://www.rigrite.com/Hardware/Hatch_%26_Port/_derived/Moonlight%20Hatch%20Parts.html_txt_Moon%2062H-HOS.gif Since they are so brittle and I'll need more I'll just replace them with Lewmar. $9.95 ...

EarthBM

I hear you on aligning the eyebolts! Also on splicing... The problem is that I haven't done it, and this is probably not the best first application... Will find a rigging shop I guess. The excellent http://www.bethandevans.com/load.htm resource basically shows splices in the 95% area of breaking loa...

EarthBM

Thanks Bo! Looks like sideways loads on the eyebolts are ok for 920's weight, based on the angles in the picture. Larry, I don't have the cradle anymore. Think the link I posed in the previous post is the rail car you just described. I tried lifting with the platform and abandoned it in the process,...

EarthBM

Thanks Larry, this should work if not too windy.

Have you ever tried using the "platform lift" (you sail over the platform, then blocks are placed under the bottom and drom the sides, then the platform lifts)?

Kind of like this:
http://tiptopwebsite.com/photos4/6400marina/26.jpg

EarthBM

Found the picture. http://www.dragonfly-trimarans.org/images35/crane_s.jpg Please click on the photo to see it enlarged! It's not a rectangle - just a fore and aft straps to align the rope with the eyebolts... Even if the four ropes going from the eyebolts to the crane hook are long enough to clear ...

EarthBM

I want to construct my own harness from .5" Dyneema (15.4 ton ISO strength). Splice the ends that go through the eye bolts, and splice+shackles on the other end. I recall that the factory harness had a strap rectangle that united all four lifting roped in the middle. What's its purpose? I cant ...

EarthBM

The easiest is to pull the centerboard up a bit, like 10cm of the board downhaul worth.

EarthBM

Larry, did yours come off? Sounds like a spare that should always be on board.

Is there no synthetic solution?

EarthBM

Thanks. That's beyond my knowledge. I did buy a Comar nmea-wifi bridge, installed it last weekend. Seems to work well, so I will start building real world polars in iRegatta soon.

EarthBM

What bridge model are you using please? Is it connected to NMEA 183 output wire or something else? Hi EarthBM, Did you get your serial to wifi bridge working? I had similar problems with my own serial to wifi bridge at the beginning. After changing the port to 10110 suggested somewhere over the inte...

EarthBM

Hi Mika, how was your Barcelona- Adriatic sail?

The nmea-wifi bridge is from http://www.madmanmarine.com/ , but when I installed it today the nmea sentences were garbled up and iRegatta could not read them.

EarthBM

Check out 2007 Yacht World article on the dragonfly.dk press page. It has dr 35 poplars that seem accurate in flat water. I am getting an NMEA - wifi device (just $120 or so), which should allow me to build actual polars in iRegatta. Bottom line you can get close to wind speed on a reach in 10 knots...

EarthBM

Well since we haven't had any posts for months (not even about the Barcelona-Slovenia delivery), here's what I did about the undersized (for the 1:1 screacher halyard) Easylock. I added a rope clutch. It holds the halyard well by itself, but I close the Easylock too just in case. http://imageshack.u...

EarthBM

How was it?

DRAGONFLY Trimarans User Forum

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Rudder downhaul cable

What dodger is this?

California - Florida Dragonfly 35/1200 swap?

Re: Thanks everyone!

VDO water tank level sensor