vertical roller modeling ac75

[Kekko999]

Good evening to all,
I am working with catiav5r20 for the realization of the vertical rudder of the boats of the next america's cup 2021 and I have a problem to ask: I brought with excel the coordinates of the profile, an eppler 520 and I have to join the two profiles at the ends following a certain design; I would need to model the profile along the opening without connecting the two profiles from a straight and use the solid multi-section command. practically it is as if the rudder had a variable rope when the "wing" opening increased from the root to the end (we imagine that the rudder is a wing). place two photos showing my model without change in opening and then a photo of the royal rudder that highlights the variation of rope on described.
the question is: is there a default command or should I use special procedures? Thank you in advance. (you will not see in my cad the horizontal part of the rudder that I will go after to assemble).

 

[alexfunk]

hi, not model for a while with catia but the command described is the correct one if you have to make a solid with sections and guides. in the second image but I see only the 2 sections and not the guides, it is for what the solid is "rectline"

 

[Kekko999]

hi, not model for a while with catia but the command described is the correct one if you have to make a solid with sections and guides. in the second image but I see only the 2 sections and not the guides, it is for what the solid is "rectline"

the guide that is not seen in my cad on catia is a straight line, if I try to join the two profiles 2d with a spline along the z axis that follows the desired trend I get a mistake because the change of rope is not tolerated.

 

[Lettore espatriato]

the guide that is not seen in my cad on catia is a straight line, if I try to join the two profiles 2d with a spline along the z axis that follows the desired trend I get a mistake because the change of rope is not tolerated.

Uh, already a profile that's made directly with solids, it seems strange. I have done some profile in the past, but it was always done with surfaces and subdivided, at least on the le and on you, to better control the surfaces.

I would definitely not do it as you set it up.

However, in your case, perhaps, just set the thorns of multisection as straight or as a z axis (I don't know if it is called so in the nautical) or as something with a less accentuated curvature, while at the spline on the , you and central parts, which you will use as guides , let the task of making travel the profile where you need.

 

[alexfunk]

try to use the command "multi-section surface". It works as in solids only that you make a superfice. you can add tangency constraints both as a section and as a guide. Hi.

 

[Lettore espatriato]

For what I have seen, to build wing profiles (or traceable to those) there are many techniques, both to define the profiles, and to build the volumes (usually with surfaces and, only at the end, in solids).

However, it seems to me that the use of the "multisection of surfaces" instead of the "multisection of solids" does not solve, in principle, the problem that it has had until now.

Maybe it works because, instead of using the whole profile, it only uses a part and so, even a little 'needed', it does the same.

but, in the specific case, I have the impression that you just go to the command window and under the button plugs (instead of leaving "computed" or what is there) select, for example, z .

because if there is a single guide curve, for example in the direction of the leading edge, and it is a curve with a minimum radius of ( hypothesis ) 50 mm , the system will take as "auto horns" that curve and will not succeed (or will have many problems ) to turn a long section ( hypotheses) 500 mm.

It seems to me that, geometrically, it is something like putting a radius 500 mm and making it pass on a radius 50 mm ( I know that some systems do the same, but actually.....) .

the evaluation of the "spine" (not "spline") is also valid for other types of construction, such as sweeps .

http://catiadoc.free.fr/online/prtug_c2/prtugbt0518.htm

 

[Lettore espatriato]

 

[Vittorio]

Hi.
I hope I understand your problem
I schematized a profile.. I think we lose america's cup 2021.
is just an example

1) In my opinion you have to build a skeleton like the image "aa" with the various sections on different planes
and on the zx floor build the two guides
2) then use solid multi section. . paying attention to the closing points that must be oriented in the same direction image "bb"

3 ) image "cc" should be the final result

 

[Kekko999]

Hi.
I hope I understand your problem
I schematized a profile.. I think we lose america's cup 2021.
is just an example

1) In my opinion you have to build a skeleton like the image "aa" with the various sections on different planes
and on the zx floor build the two guides
2) then use solid multi section. . paying attention to the closing points that must be oriented in the same direction image "bb"

3 ) image "cc" should be the final result

thanks to the answer, I also thought I had to create more profiles of different rope in the planes parallel to the opening in correspondence of the variations of section. unload the profiles from airfoil tools if you care, the only bale is that you have to fix the data in the cells. I will try again and I will

 

[Vittorio]

thanks to the answer, I also thought I had to create more profiles of different rope in the planes parallel to the opening in correspondence of the variations of section. unload the profiles from airfoil tools if you care, the only bale is that you have to fix the data in the cells. I will try again and I will

Yes, thank you
if you pass me the link I go to browse

 

[Kekko999]

Yes, thank you
if you pass me the link I go to browse

Airfoil Tools

Airfoil (aerofoil) tools and applications. Search for airfoil coordinates and dat files. Plot and comapare airfoil shapes

airfoiltools.com

 

[Vittorio]

Airfoil Tools

Airfoil (aerofoil) tools and applications. Search for airfoil coordinates and dat files. Plot and comapare airfoil shapes

airfoiltools.com

macro da exel a catiaad utilitzare questa macro

 

[Kekko999]

macro da exel a catiaprova ad usoe questa macro

I have already used it thanks to a video tutoria on youtube that explains how to create the wings in catia, you can easily find it. so I created all the parts, foil, arm, rudder.

 

[Kekko999]

good evening to all, having created a third intermediate profile between the root and the end of the rudder gave its fruits, I managed to vary the curvature at the exit edge with a spline between the 3 points. I obviously varied the profile rope (the line that combines the attack edge with the exit edge) on each floor, descending from the root to the end. I will work to obtain a more particular profile, thanks to the help

 

[Lettore espatriato]

good evening to all, having created a third intermediate profile between the root and the end of the rudder gave its fruits, I managed to vary the curvature at the exit edge with a spline between the 3 points. I obviously varied the profile rope (the line that combines the attack edge with the exit edge) on each floor, descending from the root to the end. I will work to obtain a more particular profile, thanks to the help

I noticed that the victorious profiles had a small but important difference in that area.

 

[marcofa]

Good evening to all,
I am working with catiav5r20 for the realization of the vertical rudder of the boats of the next america's cup 2021

I am making a 1:20 scale ac75 navigation model and I see that you are working on ac75.
Maybe you also have 3d designs of the hull and foil carriers.
If you'd be willing to share them with me? I would be of great help because on the web it is found little from which to desumerate measures.
Thank you.
Mar