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        Mini-HowTo Rhino ... some basics

#1 Harpye Sep 18, 2009 02:18 PM

Rhino ... some basics
 
5 Attachment(s)
OK guys ... after several of you try to discover Rhino for modelling - I thought I could
eventually post some pics about my general strategy to create a plane using Rhino

1 Importing the views into the windows.

2 Adapting the imported pics to the origin ( nosetip)

3 scaling the pics to same scale

#2 Harpye Sep 18, 2009 03:25 PM

4 Copy the relevant lines of the background images to CAD ( SPLINE)

5 Extrude the relevant lines in two windows and intersect them to get a 3D spline out of intersection of 2 2D SPLINES

#3 Harpye Sep 18, 2009 03:26 PM

6 create surface seams and control splines using intersecting surface

#4 Harpye Sep 18, 2009 04:05 PM

7 Now sequencially mesh the skeleton ... apply to areas where either just open or just closed splines in one direction of control Splines!

#5 roger2525 Sep 19, 2009 01:59 AM

Hey I like this. please keep it coming

#6 Harpye Sep 19, 2009 02:09 AM

@roger : it is just to show about the strategy... I guess I will proceed in paralle with my FW190 1:48 Scale what ever comes first....

#7 dpot Sep 19, 2009 02:26 AM

could you let us have the image so i can flow along i use acad but would like to do sum solid molding

Quote:

Originally Posted by Harpye
OK guys ... after several of you try to discover Rhino for modelling - I thought I could
eventually post some pics about my general strategy to create a plane using Rhino

1 Importing the views into the windows.

2 Adapting the imported pics to the origin ( nosetip)

3 scaling the pics to same scale


#8 Harpye Sep 20, 2009 11:50 AM

My favourite source for blueprint and drawing...

http://www.airwar.ru/other/drawe.html

Help yourself!! Would be interesting how you would do this plane in solid style....!

#9 dpot Sep 21, 2009 02:02 AM

i have had a look can only find the GOOSE MALLARD but they are not the same as your drawing


Quote:

Originally Posted by Harpye
My favourite source for blueprint and drawing...

http://www.airwar.ru/other/drawe.html

Help yourself!! Would be interesting how you would do this plane in solid style....!


#10 Harpye Sep 21, 2009 11:25 AM

Try this one ..http://www.airwar.ru/other/draw/do24t.html

#11 dpot Sep 22, 2009 09:45 AM

thanks i like the look of it i am going to trace around it in autocad as it will be quicker for me and dxf it in to Rhino and have a go at it from the 3d model end in stead of 2 and haft in acad. but will need help never used rhino before can start a new thread or is it OK to post her

Quote:

Originally Posted by Harpye


#12 Harpye Sep 22, 2009 10:52 AM

Perhaps a new thread would be ok!

Another thing... I organized a Rhino workshop several years before in micro modellers forum ... perhaps you would like to go through the tutorial ....

...you would not have to save as you work through one unit in a whole task
as the needed result is alsways included for the next step ... so you could safe your 20 saves for own design .. just send me your email and you'll get the tutorial... I'm not able to create a second one here, for this
screenshots are just a kind of hint.. to those who already been busy with Rhino... kind of possible strategy guideline!!

... have another tutorial running at full speed!

http://www.rcgroups.com/forums/showthread.php?t=1092682

Hansjoerg

#13 roger2525 Sep 22, 2009 12:27 PM

Quote:

Originally Posted by Harpye
Perhaps a new thread would be ok!

Another thing... I organized a Rhino workshop several years before in micro modellers forum ... perhaps you would like to go through the tutorial ....

...you would not have to save as you work through one unit in a whole task
as the needed result is alsways included for the next step ... so you could safe your 20 saves for own design .. just send me your email and you'll get the tutorial... I'm not able to create a second one here, for this
screenshots are just a kind of hint.. to those who already been busy with Rhino... kind of possible strategy guideline!!

... have another tutorial running at full speed!

http://www.rcgroups.com/forums/showthread.php?t=1092682

Hansjoerg

I wouldnt mind a copy of that tutorial roger_2525@yahoo.com

#14 vintage1 Oct 25, 2009 05:46 AM

Geting stringers 'right'
 
9 Attachment(s)
I thought I'd post this technique for developing stringers and formers in a fuselage.

Given you have modeled the flat outer surface - in my case I lofted it from carefully constructed cross sections plus a bit of fiddling around, but sweeping often works better, (One tries them all) the next step is to generate stringers.

In my case I needed to model 4 stringers between the spine and horizontal.

First step is to construct a plane surface that represents where the top spine stringer will go..

Then rotate and copy that about the approximate center of the model to get the stringers beautifully spaced out radially.

Intersect and develop the curves that represent the outside of the stringers..

Now draw the wood cross section and align with the start of the curves, and rotate and copy all cross sections into place.

Then multiple Sweep1's and caps generate the nice aligned curved stringers!!

Which can be used to notch the formers when you have them made up..but thats another story.

#15 vintage1 Oct 25, 2009 07:23 AM

getting sheeting and inset formers right.
 
5 Attachment(s)
Given that you have developed a solid model of the finished thing, and now you want to either inset formers so that they wont touch the covering, or inset them under sheeting, the task you have to address is to construct a surface or a solid that is offset by - say 1/16" inch inside your finished shape.

Rhino tries hard, but its best to give it simple things to do. Very complex shapes (as in this case with the gun channels) gives it headaches, lots of computing CPU time, and a final result that is full of unexpected bits shooting off wildly: Probably the key point is, don't try and offset a surface from one with sharp corners.

In the case of this particular fuselage shape, the key is to explode the solid into all its surfaces, and delete the odd ball bits, then join the bits that you do want together.

THEN and only then, you can offset the surface and produce a 1/16" thick 'shell' which can be used to slice the formers up and get their shape right, and, indeed, develop sheeting finally if that's what is required.

I redid this in about 20 minutes. It took me several days to understand the best way to do it..


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