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Old Aug 21, 2014, 09:26 PM
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A320 GSB's Avatar
United Kingdom, Harrow
Joined Dec 2013
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Sketchup

Hi all,

I'm learning sketchup, fairly new user...LOVE the programme. I've already ordered a 3d mouse because I can just tell I'm going to be using it sooo much...all the gear and no idea'r ...lol.
I know there's plenty of "how to's" on the web out there, however what I want to do with it is design and build rc aircraft on there in 3D, make sure the parts all fit properly, then print out plans on paper.
The problem is all the tutorials out there are working in 2d shapes and putting them together.

For the 3D designers out there, how did you learn to use this programme to build aircraft structures and what tips/exercises would you have for a nuuub like me to get better.

Cheers!
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Old Aug 22, 2014, 12:51 AM
You laugh... But it flies!!!
TEAJR66's Avatar
United States, MO, Rocky Mt
Joined Oct 2013
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This is an awesome thread. http://www.rcgroups.com/forums/showthread.php?t=920416
There are also a lot of great articles here on the FT How To pages. http://flitetest.com/articles#/types...ng_high_to_low
Make sure you search the 3d warehouse for common components.

I usually model my basic outline in 2d then fold, then add thickness, intersect faces, remove unwanted geometry. Stuff like that. Once I am happy, with the model, I delete the thickness. unfold and flatten the outer shell, remove faces, color the lines and print the 2d lines.

Lots of reading ahead. The Sketchup tutorials were a great help also as components and groups come in real handy.

Be safe and have fun,
Tommy
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Old Aug 22, 2014, 08:15 AM
Warbirds Lover
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Joined Jan 2008
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Thx a lot TEAJR66 !
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Old Aug 22, 2014, 09:07 AM
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United States, PA, Williamsport
Joined Jun 2006
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You're going to run into a snag... unless you have the paid license for Sketchup ($500), you can't export to plans.

I only discovered this after fully developing a UMX sized aircraft in Sketchup. It was a very rude awakening.

May want to consider one of the free-to-use CAD programs instead.

EDIT: I should add that it's totally possible someone has a workaround for this. If so, I'd love to hear it.
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Old Aug 22, 2014, 09:33 AM
You laugh... But it flies!!!
TEAJR66's Avatar
United States, MO, Rocky Mt
Joined Oct 2013
356 Posts
Quote:
Originally Posted by SixDeuces View Post
You're going to run into a snag... unless you have the paid license for Sketchup ($500), you can't export to plans.

I only discovered this after fully developing a UMX sized aircraft in Sketchup. It was a very rude awakening.

May want to consider one of the free-to-use CAD programs instead.

EDIT: I should add that it's totally possible someone has a workaround for this. If so, I'd love to hear it.
Check out the threads I linked. It is explained.

I unfold and flatten everything. Get rid of the thickness. Delete faces till all that is left is the lines. Color the lines for cut, score, crease and reference. Then print the plans and you have letter or A4 tile sized plans. Assemble pages, cut foam. VIOLA!!!

Be safe and have fun,
Tommy
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Old Aug 22, 2014, 11:29 AM
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A320 GSB's Avatar
United Kingdom, Harrow
Joined Dec 2013
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Quote:
Originally Posted by TEAJR66 View Post
This is an awesome thread. http://www.rcgroups.com/forums/showthread.php?t=920416
There are also a lot of great articles here on the FT How To pages. http://flitetest.com/articles#/types...ng_high_to_low
Make sure you search the 3d warehouse for common components.

I usually model my basic outline in 2d then fold, then add thickness, intersect faces, remove unwanted geometry. Stuff like that. Once I am happy, with the model, I delete the thickness. unfold and flatten the outer shell, remove faces, color the lines and print the 2d lines.

Lots of reading ahead. The Sketchup tutorials were a great help also as components and groups come in real handy. I usually model my basic outline in 2d then fold, then add thickness, intersect faces, remove unwanted geometry. Stuff like that. Once I am happy, with the model, I delete the thickness. unfold and flatten the outer shell, remove faces, color the lines and print the 2d lines.

Lots of reading ahead. The Sketchup tutorials were a great help also as

Be safe and have fun,
Tommy

Thanks for pointing me out to the thread, certainly a lot of reading to do, its huuuuge!

I understand groups and components well now however I'm not too sure I understand your workflow.
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Old Aug 22, 2014, 11:50 AM
You laugh... But it flies!!!
TEAJR66's Avatar
United States, MO, Rocky Mt
Joined Oct 2013
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For trying to model a full scale plane using 3 views, I have not done much. I usually just try to use the 3 views for dimensions.

I make pieces flat, thin like paper. Once I get the form I want, I push pull to get the thickness worked out. Then I resolve any conflicting geometry. Once I am happy, I make it flat and thin again. That's what I print.

Most of my planes are my scratch build designs and I use sketchup to work out the dimensions. It is also good for using calculators because you can click a surface and get the total area real fast. Find Aerodynamic centers, then measure distances.

Sketchup more or less is used to proof my concepts before I start cutting foam. Works really well for making Flite Test type designs and plans.

Be safe and have fun,
Tommy
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Old Aug 22, 2014, 11:56 AM
You laugh... But it flies!!!
TEAJR66's Avatar
United States, MO, Rocky Mt
Joined Oct 2013
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These two threads show a little bit of what I am talking about.
http://forum.flitetest.com/showthrea...C-3-C-47-AC-47
http://forum.flitetest.com/showthrea...-Fuselage-Idea

Be safe and have fun,
Tommy
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Old Aug 22, 2014, 12:14 PM
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A320 GSB's Avatar
United Kingdom, Harrow
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ok that helps a lot. gives me some idea's now, let me just practice and see what i come up with. I've just downloaded a random plan (one I thought would be simplest lol) and I'll screen shot the results for you to see...this is gonna take me back in time to A level ICT coursework LOL!!

oooh and my 3d mouse is arriving today! can't wait.
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Old Aug 22, 2014, 01:14 PM
treefinder
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SE MI
Joined Oct 2004
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A320: Welcome to what is essentially an unlimited world of 3d modeling, and it's all free if you want to do a bit of extra work. First, are you interested in doing your own designs or building models of full scale planes? Or both? All three are good, but with your own designs, you are less constrained and can work differently than if you are trying to make a foamie look like a full size. Techniques mostly the same but more freedom with your own designs. There are several guys who are very active right now doing scale models on this forum, Lockey being probably the most prolific at the moment, though not by far the only one. Personally, i have done a few "scale" models in the last few months, including the Spitfire and Rollason Beta. Both of these were started with the best 3view I could find and as many different views of the real Planes I could locate. If you can find a 3view with the cross sections of fuse, wing, etc, that is the best! In both these cases (and several others) I imported the 3view file(jpg) into sketchup, then traced around the side, plan and front views to get the basic lines in. Then I traced the sections and moved them and fitted them to the side view. One thing you will find is that 3 views are seldom true, accurate drawings, more like sketches. Often the views won't line up, or project to each other quite right, so you are left to finess. Same goes for the sections; most won't be the correct "height" to fit to the station lines on the side view, so more finessing. But eventually you can get everything to work in 3d. Then you start skinning the model. While there are lots of tools to do that, I've found with scale models, that it about as easy to just build surfaces by connecting the nodes or vertices in the curves of the sections. Remember that Sketchup is all lines and surfaces and that all surfaces are built up of flat planes, so all curves are approximations and are a series of flat planes. Once the skin is developed, i use the unfold tool (you will be finding, downloading and using a ton of "plugins" simple scripts that create tools for doing advanced tasks; the unfold tool is one, and it unwraps a series of contiguous 3d surfaces into a flat plane, so you can make a template. ). That gives me a first cut at all the templates that will be used to make the outer skin. Next I have to create inside structure to support the skin and internals. One could start a whole thread on just doing the skin and another on internal structure, but much of it is buried in the several threads on sketchup here on rcg. So, get reading! and ask as many questions as you want - but try asking in the threads dedicated to the program, as that makes it easier for folk to help by referencing posts elswhere in the same thread, and for noobs to find stuff in a single thread.

If you click on my username, and go to my blog, a couple screens down is a list of the onesheeters. all these planes were developed on Sketchup and they include my designs as well as scale designs I built from 3 views. browsing them will help with visualizing how structure is developed. Lockey and MBPetrie both do a great job of showing sketchup screen prints, which show very well how the structure looks in sketchup.

Good Luck!
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Old Aug 22, 2014, 02:03 PM
You laugh... But it flies!!!
TEAJR66's Avatar
United States, MO, Rocky Mt
Joined Oct 2013
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A320,

This is kind of cheating because I already had it all worked out.

For my "home designs" I like to start with a 20" x 30" rectangle. Just to keep me in the mind set of a foam board.

Here I will make my wing. Once it is made I save it and now I can use this basic wing in any other new design I play with later.

So 20x30.
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Old Aug 22, 2014, 04:52 PM
Marty Petri Sr.
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Thailand, Uttaradit, Bo Thong
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Quote:
Originally Posted by springer View Post
\\

Lockey and MBPetrie both do a great job of showing sketchup screen prints, which show very well how the structure looks in sketchup.

Good Luck!
Thanks for the acknowledgement Mike

A320, if you need specific hand holding, contact me at MartyPetriSr@hotmail.com

Marty
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Old Aug 22, 2014, 04:55 PM
yank and bank!!
Joined May 2013
2,161 Posts
I'm thinking bout learning freecad... are the concepts for it the same?

edit: sorry for the mild hijack... just created a gear in freecad!!!
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Old Aug 22, 2014, 07:21 PM
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A320 GSB's Avatar
United Kingdom, Harrow
Joined Dec 2013
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Wow I'm honestly humbled and sooo impressed by the skill on here. There's a lot to learn.
Quote:
First, are you interested in doing your own designs or building models of full scale planes? Or both?
Both dude! I've got ideas in my head, just need to be able to xfer them to actionable plans.

Quote:
Lockey and MBPetrie both do a great job of showing sketchup screen prints, which show very well how the structure looks in sketchup.
Lockey is the one who inspired me to have a go at scratchbuilding, I loved the look of his Vixen and also the fact that he had so many CAD drawings to help aid the build, it really helped with initial building anxiety.

MBPetrie is just on another level. I've seen some of his designs and drawings and words cannot describe how awesome they are, its like the work of a fully qualified aeronautical engineer!!!
Quote:
A320, if you need specific hand holding, contact me at MartyPetriSr@hotmail.com

Marty
You're too kind Sir! I'll be bugging you lots over coming months lol...btw I see you're a Pilot too. Looks like we've got a lot in common including our love for Mooney's!


Quote:
One could start a whole thread on just doing the skin and another on internal structure, but much of it is buried in the several threads on sketchup here on rcg. So, get reading! and ask as many questions as you want
I've done a lot of that, the more I read, the more questions I have.

Quote:
Here I will make my wing. Once it is made I save it and now I can use this basic wing in any other new design I play with later.
That looks amazing bro.
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Old Aug 22, 2014, 07:26 PM
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United Kingdom, Harrow
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here's something I made earlier...
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