RE: RT65 or just another 65M trimaran
[quote]ORIGINAL: Sirit Dear Idealist, I have been using two layers of 125g/sqm glass, the weights of the gel coated floats are 135gram each, without gelcoat they are 90g each, the main hull is 10grams heavier. I think about simply glueing the two halves together with epoxy. [image]http://www.rcsails.com/images/rt65kitdetail1.gif[/image] [image]http://www.rcsails.com/images/rt65kitdetail3.gif[/image] Today I will start the build with setting the keel box I have laminated over the keel already Siri [/quote] Are you vaccuum bagging the hulls?
Posted on: 8/4/2009 10:11 AM by Author "bertauy" in the forum "RC Sailboats"
http://www.rcuniverse.com/forum/fb.asp?m=8988893

RE: Kiwi Mini40 Trimaran build log
[quote]ORIGINAL: manta29 Guess what, it floated!! On the first test sail, it actually went quite well. A few issues to sort with the rig, and the beams still flex when the rigging is cranked up, plus a vang is needed on the job boom, but in all quite suprising. Responds well, tacks ok, the leeward floats bow stays up, although the main bow looks to me set too low, again doesn't help when the whole thing isn't very stiff. sorry for poor quality pics File <img src=''http://www.rcuniverse.com/forum/image/paperclip.gif'' border=''0'' alt='''' /><img src=''http://www.rcuniverse.com/forum/image/paperclip.gif'' border=''0'' alt='''' /> [/quote] How did you make the beams? Hulls look good.
Posted on: 8/2/2009 11:45 PM by Author "bertauy" in the forum "RC Sailboats"
http://www.rcuniverse.com/forum/fb.asp?m=8985158

RE: Kiwi Mini40 Trimaran build log
VERY NICE WORK. Cant wait to see the hulls come out of the female molds. thoughts on selling the hulls?
Posted on: 8/2/2009 12:32 AM by Author "bertauy" in the forum "RC Sailboats"
http://www.rcuniverse.com/forum/fb.asp?m=8982797

RE: RT65 or just another 65M trimaran
Hi Sirit Molds look good. Curious how you build the rudder and fin in the molds? Are you just going to put a few layers of fibreglass or carbon in the molds and fill them with epoxy? Also, can you show the layout of the radio in the boat? What are you using for winch? Yann ps: i lived in bangkok when I was 13 years old for a year and half. Really enjoyed it. I learned to windsurf in Pattaya. Actually started my rc sailboat building in thailand too.
Posted on: 7/27/2009 11:40 AM by Author "bertauy" in the forum "RC Sailboats"
http://www.rcuniverse.com/forum/fb.asp?m=8967618

RE: Kiwi Mini40 Trimaran build log
Dreamwakes, how do you intend to make the molds for fin and rudder? make 2 halves, and then join them after pulling out of the mold? I am trying to figure out the best way of making some myself. Yann
Posted on: 7/27/2009 11:32 AM by Author "bertauy" in the forum "RC Sailboats"
http://www.rcuniverse.com/forum/fb.asp?m=8967602

RE: Nightmare MKVII Trimaran Build Log
[quote]ORIGINAL: DONS BOAT WORKS Great vid, boat looks great on the water. [/quote] Yes, you need a bigger place to sail it. Looks good, acceleration is really great.
Posted on: 7/9/2009 12:43 AM by Author "bertauy" in the forum "RC Sailboats"
http://www.rcuniverse.com/forum/fb.asp?m=8918008

RE: RT65 or just another 65M trimaran
I've tried a couple of times to look at the videos, but the link doesnt work. [quote]ORIGINAL: Sirit Today I made some new clips of my RT65 in winds between 20 and 40 km/h, my friends RT65R a slimmer version of my RT65 maidened today. You can find the clips at http://www.rcsails.com/rt56r.htm Have fun [/quote]
Posted on: 6/14/2009 6:03 PM by Author "bertauy" in the forum "RC Sailboats"
http://www.rcuniverse.com/forum/fb.asp?m=8851599

RE: RT65 or just another 65M trimaran
Hi Sirit, thanks for providing the plans. Were these generated in Autocad? if so, any chance of getting the dwg files? My 7 year old daughter wants me to build her a small tri. Mine is just too big for her too handle. thanks yann
Posted on: 5/30/2009 11:16 AM by Author "bertauy" in the forum "RC Sailboats"
http://www.rcuniverse.com/forum/fb.asp?m=8811234

RE: Nightmare MKVII Trimaran Build Log
I cant find the video of the boat. can you post a link? thanks yann
Posted on: 5/7/2009 10:15 PM by Author "bertauy" in the forum "RC Sailboats"
http://www.rcuniverse.com/forum/fb.asp?m=8750025

RE: Nightmare MKVII Trimaran Build Log
looking good. cant wait to see it sail.
Posted on: 4/11/2009 11:32 AM by Author "bertauy" in the forum "RC Sailboats"
http://www.rcuniverse.com/forum/fb.asp?m=8670517

RE: Nightmare MKVII Trimaran Build Log
Nice work on the beams. I've been thinking about doing something very similar. Was going to make a mold out of 1/2"x1" piece of balsa, and use 1/4 inch router bit to round back of arm and 1/2 inch router bit to round the front. Liking your idea of using jig for underside of arm. Your work as always is inspirational. yann
Posted on: 4/3/2009 11:08 PM by Author "bertauy" in the forum "RC Sailboats"
http://www.rcuniverse.com/forum/fb.asp?m=8646716

RE: trimaran plans
I cant read austrian/german. Curious as to how the arms are built. guessing a mold is made, but want to see how the mold is made, what it looks like and how it the arms are made off the molds. yann
Posted on: 3/20/2009 1:02 AM by Author "bertauy" in the forum "RC Sailboats"
http://www.rcuniverse.com/forum/fb.asp?m=8596469

RE: 1.7 Meter
Very Nice looking boats. Curious how you seal up all the openings into the hull? mylar with electrical tape around the edges? specially made lids? yann
Posted on: 3/18/2009 8:47 PM by Author "bertauy" in the forum "RC Sailboats"
http://www.rcuniverse.com/forum/fb.asp?m=8592228

RE: Nightmare MKVII Trimaran Build Log
Geez, you are quite the detail guy, hoping that my work will come somewhat close to yours. Will be casting new hulls this week so that I can have nicer hull to deck joining. And try putting rig and fin further back. Also notice that you windsurf. I used to windsurf, but it's been over 10 years since I was really into it. going to get back into it this summer hopefully. Yann
Posted on: 2/16/2009 10:05 PM by Author "bertauy" in the forum "RC Sailboats"
http://www.rcuniverse.com/forum/fb.asp?m=8484890

RE: trimaran plans
Ernst Sailed my tri today for the first time. It's not entirely finished, ie, it needs to be sanded one more time and painted, but I just couldnt wait any longer. Here's a video of it sailing. Was taking video and controlling it at same time. :-) http://www.youtube.com/watch?v=PfKrulmabX4 and some pics. Last one shows it about to nose dive right before i let the sails out. Yann
Posted on: 2/13/2009 12:31 AM by Author "bertauy" in the forum "RC Sailboats"
http://www.rcuniverse.com/forum/fb.asp?m=8471362

RE: Nightmare MKVII Trimaran Build Log
Got to take it out for an hour or so today. Sailed nicely, tracks very well without needing any trim. Unfortunately, the 1/2 inch carbon arms are too flexible, whenever a gust of wind hit, the bow of the main hull would nose down a bit (see last picture). Need to use stiffer arms, and a smaller jib may help. here's a video of the maiden voyage. http://www.youtube.com/watch?v=PfKrulmabX4 and some pics. Now time to make another set of hulls. Also, next boat, will move the mast back an inch. yann
Posted on: 2/12/2009 9:19 PM by Author "bertauy" in the forum "RC Sailboats"
http://www.rcuniverse.com/forum/fb.asp?m=8470353

RE: Nightmare MKVII Trimaran Build Log
My approach to building the deck and joining it to the hull was: 1. Build a frame of the deck out of balsa wood and basswood, the frame follows the outline of the deck and has cross members. 2. on a sheet of mylar, lay down 2 layers of fiberglass cloth, soak it with epoxy, and squeegee out excess epoxy. 3. while the cloth is still wet, lay down the deck frame on top of the 2 layers of cloth. This way the deck frame gets a good bond to the deck. 4. when dry, peel off the mylar which makes the deck super smooth, trim off excess fiberglass to about 1-2 mm from the edge of the wood. 5. glue the edge of the hull to the wood frame and deck. Problem is that it is really hard to get the hull edge to conform to the deck frame and stick to it. Had to use a lot of tape to keep the joints together. and it got messy, ie got epoxy on the hulls which then required sanding. new approach will be the following. 1. Build a frame of the deck out of balsa wood and basswood 2. glue the deck frame to the hull using the same method you used to glue the joiner strips. 3. on a sheet of mylar, lay down 2 layers of fiberglass cloth, soak it with epoxy, and squeegee out excess epoxy. 4. while the cloth is still wet, put the hull down on top of the cloth. This should form a good bond between the 2 pieces and limits how much you have to touch the hulls and deck while epoxy is wet. Also limits how much finishing you have to do afterwards. Yann
Posted on: 2/12/2009 12:06 PM by Author "bertauy" in the forum "RC Sailboats"
http://www.rcuniverse.com/forum/fb.asp?m=8468892

RE: Nightmare MKVII Trimaran Build Log
Here's a picture of it with the rig off of a marblehead. Rig is so tall that I couldnt put the second sidehull on in the living room. Still needs to be sanded and painted, but am sailing it tomorrow, after 3 months of work I am anxious to see it sail. Hopefully will be able to take some pictures of it sailing. thinking may need to luse arger diameter carbon tubes and drill hole through them to mount them to hulls, too much play using pipe straps. Still working on building the swept forward and back arms. May pick up some carbon fiber tomorrow to cast 2 side hulls. Learned a few things in gluing decks to hulls, will try a different approach for the hull to deck joining process. yann
Posted on: 2/12/2009 12:20 AM by Author "bertauy" in the forum "RC Sailboats"
http://www.rcuniverse.com/forum/fb.asp?m=8467640

RE: Nightmare MKVII Trimaran Build Log
here it is prior to gluing decks to hulls.
Posted on: 2/9/2009 3:16 PM by Author "bertauy" in the forum "RC Sailboats"
http://www.rcuniverse.com/forum/fb.asp?m=8457376

RE: Nightmare MKVII Trimaran Build Log
[quote]ORIGINAL: TBK I will epoxy in a pine joiner strip inside along the seam that will overlap the joint and this will act to stiffen the moulds as well as provide a good joint. The ends will be closed off with pieces of balsa/thin plywood cut to fit and then the seams, nose & stern will be glassed and faired true. I wiil detail all this in the build log as I go. TBK [/quote] Ok, that's what I thought you were going to do. Wanted to see if there was some other method to use. Building my own tri and going to glue deck to hull tomorrow. Might be sailing it by this weekend. yann
Posted on: 2/8/2009 10:27 PM by Author "bertauy" in the forum "RC Sailboats"
http://www.rcuniverse.com/forum/fb.asp?m=8454921

RE: Nightmare MKVII Trimaran Build Log
Very nice. Curious as to how you plan on joining the deck to the hull and how do you intend to close up the bow and stern? yann
Posted on: 2/8/2009 4:19 AM by Author "bertauy" in the forum "RC Sailboats"
http://www.rcuniverse.com/forum/fb.asp?m=8451588

RE: Nightmare MKVII Trimaran Build Log
Very nice start to your build. Looks very meticulous in your process. Good luck, keep us posted. can you post pictures of how you joined the 2 36" sheets of balsa to cover the 48" length of your build? I am not quite getting from your description how you joined them. I used 2 part foam to fill the space between the sections, but the foam has been contracting over the last few days and distorting the plug for the side hull. I am going to need to build a new plug for the side hull using tried and true balsa planks over sections method. Yann
Posted on: 1/15/2009 12:22 PM by Author "bertauy" in the forum "RC Sailboats"
http://www.rcuniverse.com/forum/fb.asp?m=8361098

RE: Volvo 70 Ericsson Build Log
Very cool build log. Love the pictures. the canting keel is very cool too, wondering how you are going to keep the water from coming in though? yann
Posted on: 1/5/2009 5:18 PM by Author "bertauy" in the forum "RC Sailboats"
http://www.rcuniverse.com/forum/fb.asp?m=8322376

RE: trimaran plans
I started building my trimaran based off of my plans. Main hull mold is started, have lots of sanding to do. Here are some pics of the main hull
Posted on: 12/19/2008 4:36 AM by Author "bertauy" in the forum "RC Sailboats"
http://www.rcuniverse.com/forum/fb.asp?m=8260697

RE: trimaran plans
[quote]ORIGINAL: mini40 It looks like the building season has really begun! Today FOUR more persons asked for the free selfbuilding plans of the "Nightmare Mk. VII". Makes 24 overall. Just send a mail to: ernst.zemann@gmx.net, to get your own free printable .pdf- copy. These are three .zip-files inkluding complete hull drawings, rudder, centerboard, rc- installation and rigging - as .pdf-files and .dxf-files for Autocad as well. @Kzimmerman: Your copy has been sent to you! The left picture was made by TomTest: During the german "Aartalsee-Multihull-Meeting" in 2007, The left boat (yellow and purple) was designed and built by Karl Schmidt (nickname SKAUT) from AUSTRIA, who just won the latest Multihull-race series in FRANCE! The boat on the right right side was designed by Peter Scharmer (nickname WIESEL) from Germany. The picture on the right side was made by Eric Gielen: This is the carbon/epoxy prototype of the "Nightmare Mk. VII, which was designed by me - Ernst Zemann, Vienna/Austria - and was originally built by me, together with Eric Gielen at Austria - completed with the great help of Karl Schmidt, who took a lot of care for very good sets of sails! Youtube video of the "Nightmare Mk. VII": http://www.youtube.com/watch?v=KK2TdqjnzeY Taken at her maiden testtrip seven moths ago - 2:19 min. Although Eric had never sailed a rc-model trimaran before that date (!), it is clearly visible how easyly and securely this design can be sailed on one float. [/quote] the boats are beautiful, hope my boat comes out and sails as nice as yours do. Yann
Posted on: 11/20/2008 8:12 PM by Author "bertauy" in the forum "RC Sailboats"
http://www.rcuniverse.com/forum/fb.asp?m=8167537

RE: trimaran plans
Just asked for plans too. I am working on my own trimaran I designed in Autodesk Inventor. Here are some screen shots of it. yann
Posted on: 11/20/2008 8:11 PM by Author "bertauy" in the forum "RC Sailboats"
http://www.rcuniverse.com/forum/fb.asp?m=8167526