Archive for the ‘ loft ’ Category

New variant of the shape I have been thinking about

Here is my today’s result from iRhino:

The idea is that the fuselage center section blends into wings like on blended wing body, but it only forms a minor portion of the shape, high aspect ratio wings continue from the blended part and there is a tail in the rear. I have not drawn this as I was thinking because I have been thinking either V-tail or T-tail. This picture doesn’t yet have a rudder.

Now the difficulty is that I have hard time on getting the Rhino do what I think. The loft is challenging, because it follows airfoil shape, it follows the configuration and contour from the top I was thinking, but the problem is to vary the airfoil shape in the center section so that the transition from the right side to the left side is smooth and more circular than in this thing where it is pretty sharp (the sharpness there is completely unintentional and will go away as soon as I figure how to loft this thing properly).

The wing tips did not loft as I planned, and also the elevator has wrong airfoil shape in the tip, the scale2D produced results I was not planning to get. There is still something to learn in Rhino. I need to ask from maybe Jani tomorrow how to do this right.

2008
11/20
POSTED BY
CATEGORY
3d
aircraft concept
aircraft configurations
loft
unfinished drawingm irhino
5 comments

New variant of the shape I have been thinking about

Here is my today’s result from iRhino:

The idea is that the fuselage center section blends into wings like on blended wing body, but it only forms a minor portion of the shape, high aspect ratio wings continue from the blended part and there is a tail in the rear. I have not drawn this as I was thinking because I have been thinking either V-tail or T-tail. This picture doesn’t yet have a rudder.

Now the difficulty is that I have hard time on getting the Rhino do what I think. The loft is challenging, because it follows airfoil shape, it follows the configuration and contour from the top I was thinking, but the problem is to vary the airfoil shape in the center section so that the transition from the right side to the left side is smooth and more circular than in this thing where it is pretty sharp (the sharpness there is completely unintentional and will go away as soon as I figure how to loft this thing properly).

The wing tips did not loft as I planned, and also the elevator has wrong airfoil shape in the tip, the scale2D produced results I was not planning to get. There is still something to learn in Rhino. I need to ask from maybe Jani tomorrow how to do this right.

2008
11/20
POSTED BY
CATEGORY
3d
aircraft concept
aircraft configurations
loft
unfinished drawingm irhino
5 comments

Fuselage cross sections with iRhino

I described earlier on one blog entry how to make fuselage cross sections with iRhino easily. Here is the illustration of the lofted object cut to cross sections:

Cross sections, perspective:

Cross sections from front (simplified):

The source model:

The lofting capabilities of iRhino are awesome, it is easy to create shapes that would be impossible to come up with 2D cad models. I continue to be amazed with the quality of Rhino and I am also more and more convinced that there is no need for a 2D drawing program, I can do everything with Rhino. We are going to model our house next (which will not be discussed on this blog because it is not on-topic), while it is excellent for uniform 3D-shapes, it works so nicely with 2D shapes as well that it would be quite lame to spend all the time for nothing with AutoCAD (I am still getting shivers about the bad user interface, how simple things could take enormous amount of time to do and how innovation could get killed by the tool, we used to use that program when I was doing my studies, it is like completely from different planet than Rhino, and it is not a compliment for AutoCAD) where the work can be completed in matter of minutes in the Rhino..

2008
10/26
POSTED BY
CATEGORY
3d
iRhino
loft
nurbs modeling
rhino
Leave a comment

Fuselage cross sections with iRhino

I described earlier on one blog entry how to make fuselage cross sections with iRhino easily. Here is the illustration of the lofted object cut to cross sections:

Cross sections, perspective:

Cross sections from front (simplified):

The source model:

The lofting capabilities of iRhino are awesome, it is easy to create shapes that would be impossible to come up with 2D cad models. I continue to be amazed with the quality of Rhino and I am also more and more convinced that there is no need for a 2D drawing program, I can do everything with Rhino. We are going to model our house next (which will not be discussed on this blog because it is not on-topic), while it is excellent for uniform 3D-shapes, it works so nicely with 2D shapes as well that it would be quite lame to spend all the time for nothing with AutoCAD (I am still getting shivers about the bad user interface, how simple things could take enormous amount of time to do and how innovation could get killed by the tool, we used to use that program when I was doing my studies, it is like completely from different planet than Rhino, and it is not a compliment for AutoCAD) where the work can be completed in matter of minutes in the Rhino..

2008
10/26
POSTED BY
CATEGORY
3d
iRhino
loft
nurbs modeling
rhino
Leave a comment