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Old May 24, 2014, 04:12 AM
Chess club geek with wings
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United States, FL, Cape Coral
Joined Aug 2008
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Sketchup help

I'm trying to learn Sketchup and was wondering if there is some in depth on-line tutorials specifically for designing RC airplanes.

I've found "Sketchup for RC" on Utube and have learned a lot but he is only designing simple flat foam structures....

Here's what I'm trying to do, perhaps someone can give me some guidance:

I have a set of plans for my airplane in PDF and have imported it into Sketchup and scaled them to the proper scale.

I want to retain the planes exterior dimensions but re-design its internal structure.

How do I take my tracing and turn it into a 3d model where I can begin to manipulate its internal structure??

I've seen devCad advertised, perhaps its an easier program for noobs to learn?

Thanks!
Trent
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Old May 24, 2014, 08:32 AM
The Junk Man
Jacksonville, Florida
Joined Jul 2006
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There are threads scattered all over this site. One is here: http://www.rcgroups.com/forums/showt...tchup+examples

Lots of flatties in that thread but other, more scale, versions too.

Google "Sketchup for RC models" and literally thousands of hit come up.

Tom
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Old May 26, 2014, 05:31 AM
Chess club geek with wings
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United States, FL, Cape Coral
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Originally Posted by T_om View Post

Google "Sketchup for RC models" and literally thousands of hit come up.

Tom
That was the problem, too many threads! I was hoping there was a "grandaddy" of all Sketchup threads or a few large ones with lots of relevant information.

Thank you for the above link, its the most applicable I've seen to date -

Tom I see you posting a lot of information about Draftsight, perhaps you can answer this question -
Should I be using a 2D program or 3D?

I'm a scratch builder that is taking an old set of plans and updating its construction (lighter). I'm not re-designing any exterior elements, just internal. Once finished I need to be able to print out the formers, ribs etc. onto paper then I intend on cutting the design by hand.

Would 2D be better/easier to learn than 3D?
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Old May 26, 2014, 09:06 AM
The Junk Man
Jacksonville, Florida
Joined Jul 2006
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Originally Posted by blunight View Post
That was the problem, too many threads! I was hoping there was a "grandaddy" of all Sketchup threads or a few large ones with lots of relevant information.
This is not directed at you personally but to folks in general wanting to get into CAD (of any flavor).

There is a STEEP learning curve to almost all CAD programs, even the "simple" ones.

It is just the level of complexity and power. Tim Allen is always flogging "More Power!" but along with that comes complexity.

I was lucky enough (or unlucky, depending on your point of view) to have access to SolidWorks for a long time through my son's business. But the seat was needed and I had to turn in the laptop and program just as I was getting the "baby steps" hang of it... 7 months later. And my educational background (many years ago ) is architecture so I have a good grasp of drafting to start with.

You are going to have to go through all the "baby steps", including sorting through many tutorials and examples that might make no sense at first. Find ones that do. It takes time.

Quote:
Tom I see you posting a lot of information about Draftsight, perhaps you can answer this question -
Should I be using a 2D program or 3D?
I use DraftSight from time to time because it is free and has no problem with AutoCAD formats, unlike the free version of SketchUp. As I have posted elsewhere, I really do not even like it very much but it is a tool that is handy when you need that particular tool. I had rather use a chainsaw than an axe, but there are times when the axe is appropriate to the job and a chainsaw isn't. I also had Rhino for a time through another graphics business I owned but it went with the business when sold. So now I am back to SketchUp and I actually have come to like it a lot.

As for whether you should be using 2D or 3D, asking me that is like asking whether you should wear brown socks or grey socks today... it is your personal choice.

For a new hobbyist CAD user I would recommend SketchUp for three major reasons.

1. A useable, powerful, version is free.

2. There are TONS and TONS of available web tutorials out there to learn from.

3. Last, there is a huge user community that program plugins that vastly increase the base power of the program.

I am sure there are other people that have different opinions about this stuff out there. But that is what I would recommend. The choice in the end is yours of course.

Tom
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Old May 26, 2014, 09:35 AM
Chess club geek with wings
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Thank you for the information Tom, exactly what I needed.
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Old Aug 08, 2014, 10:08 AM
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Jackson, MS
Joined Apr 2010
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I am also new to Sketchup. I have found numerous tutorials on making foamys but would like to make a drawing similar to the ones I have attached. Is it possible to make these more detailed drawings with Sketchup? If you could direct me to a thread or a good tutorial I would appreciate it.

Thanks for any help.

Hal
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Old Aug 08, 2014, 09:47 PM
Jim C Patrick
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Originally Posted by H.Dale View Post
I am also new to Sketchup. I have found numerous tutorials on making foamys but would like to make a drawing similar to the ones I have attached. Is it possible to make these more detailed drawings with Sketchup? If you could direct me to a thread or a good tutorial I would appreciate it.
Your best bet is the SketchUp site itself, follow the video instructions in order. Among other things, SketchUp pioneered the video tutorial and can get you up-and-running fast.

Looking at your examples, I have to ask if you want to design and build airplanes or do you want to draw? SketchUp can do what you posted, but there are different approaches between working designs and drawings, and the illustrations you posted.
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Old Aug 08, 2014, 10:04 PM
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Originally Posted by jcpatrick View Post
Your best bet is the SketchUp site itself, follow the video instructions in order. Among other things, SketchUp pioneered the video tutorial and can get you up-and-running fast.

Looking at your examples, I have to ask if you want to design and build airplanes or do you want to draw? SketchUp can do what you posted, but there are different approaches between working designs and drawings, and the illustrations you posted.
I would like to design and build airplanes. The pictures were done with a professional CAD program and built as a model.
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Old Aug 11, 2014, 08:27 PM
Jim C Patrick
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That's fine. SketchUp is a professional program too, but oriented toward rapid expression of ideas —sketching— not detailing. Learn the program from the basic tutorials, you will struggle with aircraft if you haven't mastered the basics.

Then look around at others' work in the 3D Warehouse, download a couple and look at how they are made. Later check out the Sketchucation forums, where more advanced techniques and plugins that extend SketchUp's abilities.
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Old Aug 12, 2014, 02:58 PM
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USA, WA, Benton City
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Quote:
I would like to design and build airplanes.
It's a great starter package to begin with. You can always upgrade to Blender or FreeCad once you understand the design basics. (both are free)
Quote:
SketchUp is a professional program too, but oriented toward rapid expression of ideas —sketching— not detailing.
Pretty much covers SK8 Pro. SK isn't happy with tiny dimensions nor even nudging objects 1/32" or so. It's great for concepts but extremely fine details are not there IMHO. 3d exporting is pretty much limited to .3ds files. It 'sort of' does .stl for working with 3d files. (sometimes)

Dan
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Old Aug 20, 2014, 09:45 AM
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There was a tutorial back in 2010 that started with a few needed Sketchup basics and add-on tools then went into how to import a picture 3-view and trace the outlines. The author said he was going to continue with how to develop formers and structural elements in coming posts. I never found another part and his user name included a space which apparently isn't allowed anymore so searching for the author doesn't work. Too bad. It looked very promising.

User Name: Karl B2 where the 2 is superscript as in B "squared" and that is a space or other invisible character between the "l' in Karl and the "B" not an underscore.
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Old Aug 20, 2014, 12:22 PM
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D_Fast.

Dan was probably the guy that did the online tutorials. He has them on You Tube.

Eric B.
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Old Aug 24, 2014, 12:27 PM
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Quote:
Originally Posted by deckert View Post
SK isn't happy with tiny dimensions nor even nudging objects 1/32" or so. It's great for concepts but extremely fine details are not there IMHO.

Dan
True some things don't work on a very small part. A good work around is to scale up the part do what you need and scale back down. Work in metric scale up by 10 scale down by .1 works for me every time.
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Old Aug 24, 2014, 07:50 PM
Jim C Patrick
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SketchUp does have problems at small increments, though I've never had problems at 1/32" or even 1/64". Definitely problematic beyond that though. As Huzways says, use scaling.

The other issue is related: printing. I've had SketchUp Pro for some time, but even though it includes Layout (a printing and plotting add-on) I print all my parts from a regular CAD program. CAD just does a cleaner and straightforward scaling, sheet control and placement, and the linewidth control is perfect. DraftSight does all this fine, and IntelliCad brands all are the greatest alternative to AutoCAD as well.
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Old Aug 29, 2014, 08:47 PM
treefinder
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Blunight: There are three fairly active threads on Sketchup in the Foamies-scratchbuilt forum:

http://www.rcgroups.com/forums/showthread.php?t=920416 this is the oldest with most hints and tips of any on the forum. Lots of plugins are mentioned and either posted or links to them posted on the thread. One of the cool things about sketchup is it's open source, so many folk write up scripts that automate the things we need to do most (like mirror, unfold, slice, etc.) The way that many of us learn how to do planes is by looking at how the plugs ins are used by others doing planes.

http://www.rcgroups.com/forums/showthread.php?t=2230814 This thread is a fellow asking for help, and getting a good amount.

http://www.rcgroups.com/forums/showthread.php?t=2234280 this last one was a guy asking about importing and using 3views in building a model.

One other thing that is important to remember with sketchup is that it isn't a true solids program, but rather all lines and surfaces, in fact all curves area actually linked straight line segments (sometimes good, like when building surfaces - which are all facets; and sometimes bad, when one is trying for a smooth curved surface - but if you are building in foam, it will smooth out all the faceting, so no worries). I note that many guys who are proficient in solids, like solidworks or autocad have a lot of trouble with Sketchup as they are thinking solids operations that won't work in SU.

AS to the import/export, there are several plugins to export to autocad dxf format, so if one needs to do that, one can even with the freeware versions. Printing is discussed several times in the first thread i linked, so you can find out the best way for your printers there.

Good luck!
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