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Author Topic: Tuiga  (Read 7732 times)

sjoormen

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Tuiga
« on: September 07, 2011, 06:26:44 PM »

Hello, all.
I found these plans of Tuiga on this link:
http://www.nonsolovele.com/Plans&Models.shtml and I liked the model so I started to build my own in scale 1:15.
 Here is problem I have no experience on sailboats . I
 noticed that hull should weight around 800 to 900 grams but since I tried to build around positive my hull weights 1240 grams.
 Ballast which I made is bit light with 7,74 kg compared with planned 7,890 kg.
 That I can fix with adding more ballast.
 I noticed that hull lies with that ballast bit low on water( empty hull with ballast only  lies on water line)
it looks like displacement  of boat is short of about 2 kg.
 Two things came on my mind- I can try with lighter ballast- but since those classic yachts have short keel as it is I don't know if it will be able to carry sails.
Or if I build her heavy - probably will be slower what will be handling like.
 I also expect that sailing will be more complicated than modern sailboats especially for beginner like me.
 How sensitive are yacht with to light ballast  and low displacement.
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sjoormen

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Re: Tuiga
« Reply #1 on: September 07, 2011, 06:30:28 PM »

Few links of yacht:
http://www.classicyacht.info/modules/yachts/Tuiga-TYearBuilt-yachts_detail-676.html
http://yachts.monacoeye.com/yachtsbysize/pages/tuiga01.html
I will post photos of my boat later since I have few problems with my camera :embarrassed:
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sjoormen

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Re: Tuiga
« Reply #2 on: September 08, 2011, 05:25:32 PM »


Another idea I got is to make false keel with lighter ballast- which will look ugly but it would probably work
or to make bulb for (bit) lighter ballast which would be fixed to keel (which  would be as it is)

And few photos:





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sjoormen

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Re: Tuiga
« Reply #3 on: September 17, 2011, 04:15:34 PM »

I also found part 2:
http://www.nonsolovele.com/DAVINTAGE/Tuiga/TUIGA%2015mJI-2parte.pdf
anyone here speaks Italian- mine is even vorse than English %) I have few questions :D
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tigertiger

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Re: Tuiga
« Reply #4 on: September 18, 2011, 11:57:31 AM »

Hi sjoormen

Looking at your original questions.
If you have more ballast and she is lower in the water, you will get more drag and she will not sail as fast. Unless you are racing this will not be noticed.
A heavier boat will not bob like a cork or fishing float when the water is rough, she will cut through waves much better and have a very nice wake.

If the ballast is too light then sailing in stronger wind may be a problem, as you may have more weight above the waterline. You will not know unless/until you try. You could make temporary sails to test this, from cheap shower curtain or plastic sheet.
If this is a problem you can make the sails smaller than scale.

Just my thoughts.



Regarding Italian, no problem.
This document you link to allows you to highlight text. Just copy and paste it into any translation program on the internet, e.g. translate.google.com
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sjoormen

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Re: Tuiga
« Reply #5 on: September 19, 2011, 02:27:18 PM »

Thanks for answer. It probably is best idea to try on water. There are few words that puzzles me:
scotte( probably rope)
fiocchi
randa (probably main sail)
violon
trin
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elias

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Re: Tuiga
« Reply #6 on: December 16, 2011, 12:24:30 AM »

Here you can get the first part ot Tuiga's Pdf.

If you can't get from here, just type in the Google box  "Tuiga prima parte pdf".

http://www.google.pt/search?sourceid=navclient&aq=1&oq=&hl=pt-PT&ie=UTF-8&rlz=1T4GPTB_pt-PTPT304PT304&q=tuiga+15+m+prima+parte&gs_upl=0l0l0l1872lllllllllll0&aqi=s140
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sjoormen

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Re: Tuiga
« Reply #7 on: January 01, 2012, 06:43:34 PM »

Thanks for answer and sorry about late response.
 I made some progress since my last posting here,
I am toying with servos -I have Hitec hs-765hb strongest I could get ,
but I don't know if they are strong enough. Still lots of studying ahead of me.







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JayDee

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Re: Tuiga
« Reply #8 on: January 01, 2012, 09:03:19 PM »


Hello Sjoormen,

You are making a very good job of constructing the hull of your boat.

I think you should spend some time thinking about all those rigging lines and radio gear, which will be covered up by the deck.
When the deck is fitted into place, will you be able to repair any of those lines if they were to snap, or come off the pulleys ???.

Worth thinking about now, while you still have the chance to imagine any future disasters and how they could be fixed !.

The keel could be made at a lighter weight and still be effective, by making the keel deeper.
A "true to Scale" yacht will always be blown about in the wind, the J Class yachts in America, have a keel which is 50 mm deeper than Scale.
They still heel over a lot in the wind.

You can scale all parts of your boat, but, you cannot scale the Wind !!.

The keel is not seen while the boat is sailing, a deeper one will make your boat sail more like the real one did.
Have a look at the keel fitted to my Schooner, Bluenose, she sails very well, the real boat did not have a keel.
People will understand that a keel is required on a model like yours, with all those sails.

John.
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JayDee

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Re: Tuiga
« Reply #9 on: January 01, 2012, 10:11:36 PM »


Hello Sjoormen,

Just been looking at the plans for you boat.
The bottom of the fibreglass keel could be extended down with a Lead keel and would still look "Scale".

All of the ballast would then be as low as possible.

John.
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sjoormen

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Re: Tuiga
« Reply #10 on: January 02, 2012, 08:54:03 AM »

Thanks for replay,
yes I tried to make three openings for acessing winches and changing springs
 as big as I could but it still is lesson of frustration when I try to fix anything in the hull {-),
 I have made deck of balsa and glassed it with epoxy resin.
I will wait with glueing it until winches are tested as I am still afraid weather are they strong enough.
I am still concerned about openings where wires are going trough the deck
 as they are placed well outside of the deck so any heeling may be reason for water in the hull.
 About ballast you are also right, I have these two ideas about bulbous ballast but
 until I place boat on the water I am not sure about displacement as I build this is getting heavier and heavier >:-o.
 So I will probably end with deeper placed lighter weight. I am trying to test as much as I can before I build
, but as much fun as this is it takes a lot of time.
I probably should try something simpler for my first large sail boat but  gaff rigger was always my favorite so,..




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roycv

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Re: Tuiga
« Reply #11 on: January 02, 2012, 12:50:10 PM »

Hello and a grand job you are doing on the hull.  I have to say that I would not make the keel in the shape shown as it will pick up debris from the lake, with the bow taking everything down from the surface to the 'jaws' shape you have there.

I have built a similarly proportioned yacht of that era 43 inches loa and 5.5 kg ms displacement and lots of sail area.

The lead bulb weight that I use is 300mm below waterline and with all sails up she is very tender but works well in light winds.  I have balanced the hull so that in stronger winds, I can take out the fore jib and install a simple forestay in its place and then she sails extremely well.  This type of boat was really meant for only medium winds under full sail.

I found I had to make the rudder as big as possible as when the hull heels over in the wind the rudder is more like the elevator of an aircraft and it is very easy to lose directional control.

One way to put in extra displacement into the hull is make the keel sides thicker, perhaps a bit late now but I got a lot of the extra displacement I was looking for in this way.
Good luck and look forward to the finished model sailing.
regards Roy
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roycv

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Re: Tuiga
« Reply #12 on: January 02, 2012, 12:57:17 PM »

Hello again just looking more closely at your photos, I see that you have a main boom extending over the stern.
 On the full size yachts when tacking the leeward backstay was slackened to allow the sail to move across.  Have you made allowances for this?

I have to say that I cheated with my yacht and shortened the main boom so that I could have a permanent back stay.
regards Roy
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rmaddock

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Re: Tuiga
« Reply #13 on: January 02, 2012, 03:37:55 PM »

She's looking really nice.  :-))
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sjoormen

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Re: Tuiga
« Reply #14 on: January 03, 2012, 03:42:53 PM »

Thanks, guys,
yes debris might be problem,
but as I said I don't know yet how deep ballast will be placed
 as I don't know how much will be overweight :embarrassed:.

 If 5 cm of added depth then bulb will not be necessary,
 but if that will not be sufficient then bulb will be necessary I am afraid.
 That I don't mind as removable keel will be necessary for transportation.
 About slacking backstay- I am trying to preserve things as they are on real boat.
 
If winch is strong enough -no problem: I need about 400 mm for aft backstay
and winch allowes about 450 mm on both sides(half from middle position)
 I think I can fix problem with RC If winch is not strong enough then
I will buy another two from Conrad, as I have middle one for main sail.
 
I would rather not change anything as those are much heavier
and they are not proportional and also two end switches are needed.
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Martin [Admin]

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Re: Tuiga
« Reply #15 on: March 26, 2012, 03:25:16 PM »

How's the build going?   :-)
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sjoormen

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Re: Tuiga
« Reply #16 on: March 30, 2012, 06:15:31 PM »

Huh a lot to figure out and even more to do %%, but I really like it.
 Very different than other models I did.
 Hull is almost finished -well if prolonged keel will not be needed.
 I will rebuild winches though. I was thinking after painting hull first will be dry test in wind -
I'll try to figure forces of wind . That should prowide me clue how strong winches should be.
 I also must make proper sails- for test I made polyethylene ones.
 Rigging itself will probably be altered in details.
I made about fifty pulleys and even more shackles , for scale look, but weight will probably cool me down for minimum. I have problems with my camera so I have only few photos >>:-(
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sjoormen

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Re: Tuiga
« Reply #17 on: April 07, 2012, 04:07:45 PM »

Few photos I managed to take







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rmaddock

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Re: Tuiga
« Reply #18 on: April 07, 2012, 06:31:22 PM »

 :o Wow!  :o

Tat looks so utterly, fantastically complicated.....I want one!
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sjoormen

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Re: Tuiga
« Reply #19 on: April 16, 2012, 07:08:40 PM »

I've  been trying to make jigs for sails ,but I don't know how deep  profile I should take - especially on main sail, any idea? should I take marblehead or IOM and scale up?

@rmaddock: few more frustrating afternoons and I'll say: come and get it %% :}
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sjoormen

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Re: Tuiga
« Reply #20 on: April 28, 2012, 06:04:09 PM »

Few photos of my boat. I finally managed to make first set of sails of Dacron. Not the best I've seen but for the first try,.. I used Claudio's gadget and glued together with Tessa tape and sew them together. Now I can try measure forces on sail %) no more excuses :}





Of course I messed up photos- wrong light, large boat, me to lazy to drag boat outdoors, result is, well bit " romantic"
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sjoormen

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Re: Tuiga
« Reply #21 on: June 03, 2012, 06:07:07 PM »

I've been toying with winch for mainsail, here is first version , it works,
now I am trying to fix transmitter as it got crazy. Well I somehow managed to reprogram blasted thing >:-o

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bbdave

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Re: Tuiga
« Reply #22 on: June 05, 2012, 07:42:59 PM »

It looks great amazing rigging and fittings did you make the mast furniture if not where is it from?

Dave
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sjoormen

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Re: Tuiga
« Reply #23 on: June 06, 2012, 04:56:26 PM »

It is all home made and very easy too.
 But I must admit I have some tools here that simplify things and also speed up.
But it is not really that amazing and it still has to prove if it is made good enough that will whitstand all forces.
I am beginner with this, so...
Anyway if I can help with something- just ask -if I can't answer there are lot smarter guys here I am sure they will help gladly.
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