Main & Jib sheeting circuit
During mounting of pulleys, I found out that was much simpler to invert the arm swinging function and fix the anchoring point to the Fin Box. In this ways 2 pulleys and relative frictions disappears !!!
Probably I was sleeping when I drew the 1st circuit above !!!
The Fairlead composed of brass tubing inserted and glued into a carbon tube . At the exstreme end rivets are soldered in order to have a smooth surface for the sheet. Mounting details at post 158
Claudio
Hi Claudio,
I have a suggestion for your servo install. Turn the servo 180 degrees.
Then, when the sail is in at close hauled, set up the arm so that it is in line with the sheet. That way the effort on the servo arm is inline and should help the servo ‘hold’ at close hauled with minimal draw on the battery.
My IOM is rigged almost identically to your second diagram, except that my servo arm is vertical in the hull.
It may just be the schematic, but the sheeting post looks rather far forward.
On my IOM, the post is 220mm behind the mast. The block on the servo arm is set at 10mm and the arm has about 140 degrees of travel and gives me 330 mm of sheet travel.
Thank you John
your remarks are right.
Since the Servo arm of 112mm is operating under a “bridge”, it can move horizontally only for 110/112°. I have no space to put it vertically !
The arm swing angle produces a span of 175/176mm that become 350/352mm sheet travel.
The sheeting post, that I call fearlead, is at 265 mm from the boom center of rotation that is at 4mm from the back face of the mast.
The ideal would be to increase this distance making use of a wider servo swing angle.
Actually the boom swing is limited to 84°, the sheet lenght required is of 352mm therefore in line with the present design conditions.
I re-propose the drawing with more informations, showing the servo rotation according to your suggestion, but unfortunately the alignment is limited by the bridge width. I will move the back pulley as such to improve the alignment situation.
Thank you again
Cheers
Claudio
Good evening for all!
I’m a new entry and I havent’t see a dedicated section for presentation but I hope writer IN topic.
Let me just say one thing for Claudio: Congratulations is magnificent 
Hi
Stefano
I’m sorry for my english
Thank you Stefano I appreciate !
Close to the end !!!
It is heavier than the expected by 100g equivalent to 0.6mm deeper in the water !!!
The actual measured total weight including appendages and rig is 4325g against 4225g as design.
Still very few grams needed for various finishes and deck bonding.
Claudio
Claudio sei un mostro…di bravura…
Tiziano, don’t tell me I could believe it !!!
Here I am , the equilibrium of the Hull fully equiped with electronics is a must, the Bulb need to compensate only the Rig.
Tested with and without appendages. Anchoring on the Center of Buoyancy that is also the fin attachment rod.
The weights : missing the bulb and the Rig
Only the Deck bonding is left.
Is time to start the Sails & Rigging
Claudio
wow… now that is great. i cant wait to see it in the water
congrats:zbeer:
Hi Cougar,
Thank you, I hope me to.
Being an experimental prototype, I’m very interested to see the sailing capability as many of my club friends.
If it will a big fiasco I will let you knows of course and all I presented here will be good only as documentary on construction only !
From constructional point of view I did almost my best knowing that some weight can be gained here and there.
Claudio
Hi Claudio
Super job! Very nice.
You shipped me the “OTHER” (secret) hull - right ??? [wink, wink]
Dick
Hi Claudio
I hope you don’t stop posting when you finish the hull. I would like to follow your rig building methods also. Thank you very much for this thread, it has been part of my morning coffee for a long time.
Don
sorry dick… oracle has been shipped north to canada… right Claudio?
after all who is the bigger americas cup fan? me of a multi hull guy:p
cheer claudio… you did yourself proud:zbeer:
go oracle
Hi Dick,
I have to confess that since many asked the drawings of various ‘old’ America Cup boats that I drew in accordance with the " IACC120 Rules", I do not remember exactly who ask for the Oracle or New Zealand, or Luna Rossa or China Team, since I do not keep the records. Sorry Dick perhaps you may refresh my memory !
Some asked also diffrent scale from 1:20.
Anyhow, the IACC120 boats projects are different from the actual AC33 under construction, that by the way is made as a Class M.
The Plans adapted to the IACC120 Rules are ready but waiting the results of this AC33.
Few days ago we went testing for the first time one of my projects the Alinghi SUI-100 made in Italy by Stefano.
Among that it was a little weather helming easily corrected by advancing the mast step by 1cm, the most surprising effect was the extreme capability to change course direction without loosing speed, like a car on the road. All presents confirmed that this quality is rarely seen.
Cheers
Claudio
Hi Don
I would like to start presenting the tool (adjustable block) I made and then describing the sail construction.
So far I used the tool for traning only with few samples of mylar and simple paper.
You may follows this discussion :
http://www.baronerosso.net/forum/navimodellismo-vela/98789-utensile-per-vele-4.html
Most interesting, start from page 4 to page 7, unfortunately all is written in Italian, but the many pictures introduced as usual, are self explanatory.
I should probably translate part of that tread ?
Let me knows
Ciao
Claudio
PS: you may find in the PDF format my book of 68 pages on the subject that can be downloaded from this site AMON (my Italian Club) :
http://www.nonsolovele.com/Tecniche.shtml
Book title : " Come fare le vele" di Claudio Diolaiti that’s means : ‘How to make the sails’
The Sail Plan
It may be a little more than a type A for a Class M but it is part of the experiment.
Many questions are open about the lateral stability between an AC120 and a class M.
http://www.youtube.com/watch?v=L_yFy0Ai3yk&feature=related
The day before the wind was blowing to 12/13 Knt and gusting to 17knt
this film is eloquent ; the first boat is my Studio3 developped some 3 years ago, some time is also diving ! The Black boat is the Alinghi under the very first trial.
http://www.youtube.com/watch?v=XPUdgIYVA-Y&feature=related
This film, about the testing on the first SUI-100, is rather interesting; starting from 2’30" the ac120 is racing side to side with a very good class M , they use similar sail surface of 7200cm² the wind was varying from 5 to 7 knots.
The displacement may be similar but the bulbs are differents by 300g and 8/10cm in fin lenght
Claudio
Claudio - not to worry.
It was my attempt at humor - asking if my “free” and completly built hull was already sent. :lol:
Same with Cougar’s comment. Only a joke.
Dick
Claudio
Would you mind telling me why you didn’t use “Claudio’s Gadjet” as described at length in the “Sailmaking” thread. Have you discovered a fault with it?
Thanks
Don
Hi Claudio,
I have been looking hard at your latest winch layout diag. and your sail plan.
Just using my eye and my experience, the mast position will end up being between 10 to 20 mm ahead of the fin box.
If I am correct, then the bridge that you are building is unnecessarily long. The bridge could be replaced by a simple vertical post attached to the front of the fin box. That way, the bridge and the front support can be eliminated. If the front support is eliminated, then the servo can swing further forward and inboard and improve the alignment of the load at close hauled.
John
No, no faults found and many of my sails are done with this tool, but the block methods with the hinged half is more confortable .
Claudio
I appreciate John what you says, but his not correct your assumption, I redrawn the plan removing the unnecessary information. Without knowing the full design is somewhat difficult to understad certains choices. Be patient it will arrive “if OK on the water” !!!
You will see that the mast step is at 105mm from the front side of the fin box and not at 10 to 20mm as you mention. This is not a class IOM a not a classic M as well, but a prototype with some peculiar differences.
If the bridge is there is beacause is the only solution I found unless to put much forward the full servo with the balance consequences. For the same reasons I could also not put it behind the fin box. So the only solution to support the mast compression efforts , was to make a solid bridge.
To achieve what you says I should make a wider bridge that will be also heavier.
The final consequence is that the solution is the RMG winch that unfortunately cost 5 times more.
Cheers
Claudio