hi everyone
Just reading the May 2004 seahorse and you maybe interested if you have a look and open the front page there is a picture of the test model for Yves boat that they built it looks great it is 2.4 metres long though but is flying a hull in the shot and looks real nice.
have a look if you can.
cheers gappy
Thats the picture looks great.
Cheers Gappy
thats a beautiful model aym
Something Is Nothing and Nothing Is Something!
I wonder why he felt he needed those mast compression struts under the mast bases. It looks like the leeward one is dragging in the water (hence the splash on the windward side of the leeward hull near the forward cross beam). It seems like the cross beam should have been adequate to support the compression loads from the mast. If their not, it seems like the better solution woul dhave been to beef up the cross beams rather than add those struts. It looks like he has rigged vangs for the two sails from that strut so maybe that is what it is for…
I’m also wondering about the little flap sticking off the back of the rear cross beam. It looks like they might have in mind an automatic sheeting system that will ease the sheets as the boat heels. The flap might be a skimmer that would “sense” the water’s surface and therefore the heel of the boat and react by easing the sheets accordingly. But it looks like it is not being used…
I see a lot of control lines on that thing. It looks like there is a control line for mast rotation (the red line forward of the masts). There is also something sticking up off the rear crossbeam to the leeward boom. Could that be a pushrod for sail trim? That seems odd… anyway, I wonder how many channels of conrtol he has. The sail shape looks a bit ratty, so I would be surprised if he was able learn anything detailed about the rig performance so it seems like the number of control lines might be overkill. I was under the impression that this was fundamentally a test of the hull shape and overall boat balance. Seems like they put a lot of work into stuff that would not matter for that exercise…
Well, it is a awesome looking boat none the less (as is the full size version).
Will Gorgen
aym, that’s very cool!! [8D][8D][:-shades][:)][:-spin]
ooooh I must precise that it’s parlier’s architectural team which have made it, to test the concept !
Bummer - is it me and IE 6.0 - or has the picture been blocked?
All I get is the box with internal red “X” !
Dick…
it worked before…now i have the same [X] [:(]
_/ if it isn’t broken, don’t fix it! _
for those who wants to see the “history” of the hydraplaneur , go to see here (in english) and all the photos !
http://www.parlier.org/hydraplaneur/bateau/histoire.php?lang=eng
Hi
Does anyone know whre i could get plans for either a Mini 40 cat or a 2 metre cat as would be great to get into building one eitehr plans off the net or send away for them are cool so any help would be great.
Cheers Gappy
Gappy - send me an email and I can provide more info. Also, look around as I posted a bunch of different plans for Cougar, even though you’ss need to wade through some B.S.
A fellow in the U.K. (Anthony Wright) is build a Mini40 cat, and Jean Margail in France has internet (free) plans for his 2 Meter cat. That is about the limit that I am aware of - as most eveything else is trimarans. You can probably modify one of the tri designs to come up with a big cat, but I think 2 main hulls might be too much beam, and the floats not enough. You probably would want/have to modify the floats.
The cats were not very popular, so not much out there. Search here for Jean’s boat (WATER RESIST) http://water.resist.free.fr/
and if you want to experiment, you could perhaps enlarge via photo copier or CAD the floats of any good tri and play with that.
Peter may also chime in, as there are/were a couple of cats sailing Australia at his club.
Email me if questions.
Dick
Hi
Thanks for that what about plans for 2 metre tris then do you have any info on this though I might just jump in at the deep end and learn quickly.
Cheers gappy
Gappy
Traplett publications isprobably the best place to look for 2 meter plans. A design called Midnight Oil is a good starting point. I have seen and sailed one of these boats and they are fun.
Water resist has a two metre design, but as I haven’t seen one of them sailing can’t comment on what there like.
My first mini40 cat was made up using the floats from the trimaran design called Snapdragon. The other cat’s that did sail in our club were very similar in design to the cats that Anthony Wright in the UK is making.
Peter
MIDNIGHT OIL is the one most have built to, although a “Group” in the U.K. are putting together a 2 Meter to challenge the French. It is designed by Nigel Irens for them, and follows the general lines of Hydrophere with the exception there is more of a pronounced “T” shape to the stern of the main hull. I have received recent photos, but no OK to post as public. Still if you look at the rear shot of the “real” boat, you can pretty much envision what the main hull will look like.
Download Attachment: [ hydro5.jpg](http://www.rcsailing.net/forum1/data/Dick Lemke/2004610154732_hydro5.jpg)
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MIDNIGHT OIL plans are available (??) through Traplett Publications, I believe. If not perhaps Peter Birch can verify with his guys in Australia.
Several other alternatives are to scale “UP” a current trimaran plan set. GHOST TRAIN (by same designer of MIDNIGHT OIL) is available for free from the KIWI web site run by Alan Hayes. SNAPDRAGGON is a Mini40 also with plans from Traplett and those too could be scaled up to 2 Meters. Keep in mind how big 2 Meter x 2 Meters really is !!! The one MIDNIGHT OIL boat had a special trailer built ! I’m at work at the moment, but I have some photos and a side line drawing of MIDNIGHT OIL at home. Here is a “study drawing” of GHOST TRAIN to give you an idea.
Download Attachment: [ smBWHull.jpg](http://www.rcsailing.net/forum1/data/Dick Lemke/20046101639_smBWHull.jpg)
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I also have cross section plans for a 3 Meter - and that could be REDUCED in size to the 2 Meter dimensions.
Dick/Peter
Hi
Thanks for the help if you have any pics Dick it would be great to see them as then I can get a better idea of what i would be in for. I am unsure but would proabably make it so that you could pull it down for transport unless it would not be rigid enough like that and has to be bonded.
Any way any helps is great.
Cheers Gappy
Hi!
Very nice pic. My Kyusho starts to be a non-Fortune. Something must be done…
Regards,
Booster
Will, the compression struts (called dolphin strikers)are ther to take up the loading from the shouds etc pulling down on the mast which in turn pushes down on the beam, without them it would be hard to get much rig tension without oveloading the beam. I dont think the leward one is in the water, I think its just the hull throwing some spray the same as on the leward side of the hull. That model is pretty huge, over 2m long, so I guess the put most of the controls they would have on the final boat. I think that was just a concept model built after the 20’ beach cat, I beleive they also played with an F18 hobie at one point.
Luff 'em & leave 'em.
Gappy -
Sorry but I could not find the side view line drawings, although I know they are here somewhere! I was able to find the following photos which will give you an idea as to the size of these boats…
<font color=“red”>MIDNIGHT OIL</font id=“red”>
Download Attachment:[ aust-1.jpg](http://www.rcsailing.net/forum1/data/dick lemke/2004610215428_aust-1.jpg)
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<font color=“red”>MIDNIGHT OIL </font id=“red”>- Rigged and on trailer
Download Attachment: [ aust-2.jpg](http://www.rcsailing.net/forum1/data/dick lemke/2004610215543_aust-2.jpg)
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CRAIG McEWAN’S BOAT
Download Attachment: [ craig3.jpg](http://www.rcsailing.net/forum1/data/dick lemke/2004610215657_craig3.jpg)
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CRAIG’S BOAT ON THE WATER
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THE FOLLOWING IS THE U.K. 2 METER NOW BEING BUILT. (these are the plugs)
Download Attachment: [ MHMainStern.jpg](http://www.rcsailing.net/forum1/data/dick lemke/200461022018_MHMainStern.jpg)
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Download Attachment: [ MHMainandfloat2.jpg](http://www.rcsailing.net/forum1/data/dick lemke/200461022045_MHMainandfloat2.jpg)
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Download Attachment: [ MHMainStern.jpg](http://www.rcsailing.net/forum1/data/dick lemke/200461022111_MHMainStern.jpg)
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JUST A REMINDER ABOUT RELATIVE SIZE ![:D]
Download Attachment: [ Red 2Meter.jpg](http://www.rcsailing.net/forum1/data/dick lemke/200461022249_Red 2Meter.jpg)
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<font color=“red”>“BODY & SOUL” </font id=“red”>A U.K. 2 METER (Mike Howell built)
Download Attachment: [ bs2sm.jpg](http://www.rcsailing.net/forum1/data/dick lemke/200461022742_bs2sm.jpg)
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<font color=“red”>WATER RESIST </font id=“red”>2 METER CAT (Jean Margail - France)
Download Attachment: [ Smallw22.jpg](http://www.rcsailing.net/forum1/data/dick lemke/2004610221154_Smallw22.jpg)
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<center>Whew [:-bigeyes] ---- hope that’s enough to give you an idea ! Any questions, please post or email.</center>
I know what the “dolphin strikers” are for. They are quite common on other catamarans when the mast is positioned near the center of the beam. They are a great way to add stiffness to the crossbeam so that is will not bend unter the compression loads of the mast (which are the result of rig tensions reacting the sail loads).
However, with the masts so close to the hulls, these struts should not have been needed on this design. The amount of bending load that could be imparted in the short span between the hull and the mast base should have been managable with a much more integrated structure. and the beams themselves are quite unsupported as there is not “dolphin striker” in the center of the beam to react the bending loads of the beam overall.
I’m sure if they had planned to actually compete with that model, they would have cleaned it us a bit more. as a proof of concept rig, you can handle a few loose ends like that…
Will Gorgen