WIP - Short Stirling
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 From:  JPBWEB
2966.4 In reply to 2966.3 
It takes a while to “think Blend”, but for me it is the easiest way to ensure continuity and smoothness in models. As I model planes and ships that are semi-organic hard surfaces, it is important to understand G1, G2 and G3 continuity. MoI does a much better job of that than my eye-hand coordination. I try to use Blend as much as possible to generate the curves and surfaces that I will use. To do that, is is often enough to draw a few input curves, blend them as appropriate, extrude, blend again etc.

Here is an example: this is the top turret of the Stirling, a FN7A early model.

To make the dome shape, I generated a blended curve that matched the blueprint, using the “Bulge” slider as a way to adjust the shape. I also drew a half circle. I then extruded the two curves, then blended the extrusions. It is important to match edges. That is a limitation of the current version of MoI, you cannot yet blend between two sets of edges, like Rhino can.


Then it is a matter of mirroring and repeating the process for the rest of the model.


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 From:  Marc (TELLIER)
2966.5 In reply to 2966.4 
Thanks for your example jpbweb, very instructive!

I will try this...

Marc
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 From:  Frenchy Pilou (PILOU)
2966.6 
Very soft smooth result!

EDITED: 5 Oct 2009 by PILOU

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 From:  Anis
2966.7 In reply to 2966.4 
Hi JPBWE,

Nice to follow your project.
Just one note here :



Maybe you have to modify to get smooth connectivity ;)

thanks !
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 From:  JPBWEB
2966.8 In reply to 2966.7 
Indeed.. The discrepancy was a very slight misalignment of the original two curves on which the cone is based. This meant that I had to start from scratch, which is just as well because the first version was not accurate according to photos I just found. This model of turret was only on the original batch of Stirling bombers, and as such not all that well documented.

I am not sure whether this new version is any more accurate, but at least it is smoother!

EDITED: 5 Oct 2009 by JPBWEB

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 From:  JPBWEB
2966.9 In reply to 2966.8 
Maybe I should add that this turret is only 3.08 mm high.

I pride in pushing MoI (and Flamingo for rendering) to the maximum, but it is unlikely that a very slight curvature glitch could be rendered in the real world even with current leading edge 3d printing equipment. Even for a screen rendering of a completed aircraft, the bump maps alone would probably cover the glitch, even in a close up view.

Nonetheless, this shows that utmost care is required if going for top smoothness, but the tool can do it. I love MoI !
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 From:  DannyT (DANTAS)
2966.10 In reply to 2966.1 
Looks like a good start there Jean-Paul, keep it coming.

Cheers
~Danny~
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 From:  angeliclight
2966.11 
Thanks for posting this - it is very educational.
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