How to make tip wings

Rhino Rhino for Windows
1

Hello every one, I am learning Rhino and as I am a fan of flying, I was following a tutorial to make wings http://vimeo.com/76711114

but I do not understand why I can not close the tip wings with a tangent continuity:

can you help me? What book do you recommend to learn to draw well planes?

thanks

2

How are you constructing the wing and tip to get what you show?

3

I have extruded a naca Profile (for stabilyzer), I inserted two nodes, I
selected the extreme points of profile and I’ve aligned points with _setpt.

4

Hi Filippo,
if you align the last row of points with the previous row, you get exactly a perfect round and tangent wing tip.

5

It looks like you inserted knots into the surface, but since it was an extrusion it was of Degree 1, so you get sharp kinks instead of a smooth surface. So the extra step is, before inserting points, use ChangeDegee to raise the degree of the wing surface along its length from 1 to 3(or 5.)

6

Thanks to all, I will try :wink:

7

Thanks, degree 5 :wink: