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The 'What did you do in your workshop tonight?' thread

Wild man

70cc twin V2
took the new AIR TRACTOR out the other day and put the first test flight on it. The Air Tractor is a nice flying plane, but The appearance of the colors looked to dull so I added some red and going to add some blue on top.
trim.jpg
 
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BalsaDust

Moderator
Question if I draw up a plane in 2 D and I do all three views in AutoCAD can you then take those drawings and create a 3D drawing.


Little more to it that that but yes I could use them to turn it into a 3D model. Now doing full fuse stuff I’m not sure about just yet but will get there. Little later when I’m back on the computer I will take some screen shots and explain some of the differences between it and AutoCAD.

Simply put though those pictures I post are off an assembly consisting of 12 different parts so that means 12 different files all then placed within an assembly file. Pretty neat how it all works.
 

BalsaDust

Moderator
Well I can't get the computer to remote into to be able to have a license to run inventor from home but I will do my best to explain without them and can post pictures tomorrow.
Take the horizontal portion of the fuse. That is actually done in three different sketches and could have been done in more. First the outer perimeter was sketched in 2D on my XY plane. Every aspect of it needs to be dimensioned and I can say that is tough. The idea here is you are trying to get the sketch to be fully constrained thus each sketch you want to be as simple as possible. So I say I did it in 3 and could have been more and from what I have learned it should have been more. Anyways, after that base sketch is done I can extrude that part which for it is really just define how thick I want it to be. There the first portion is done.

Next I will click on start 2D sketch. At this point you decide what face of the part you want to sketch on. I choose the bottom so that I can layout all of the notches that the other part of the fuse will key into. Key here is simple and I learned the hard way because of the way I do things in autoCAD. I drew each and every one of those rectangles which meens I had to dimension every single one of them. The way I have learned to do it now is to establish a center construction line where I can draw a single rectangle and properly dimension it. Once that is done I was just able to use the pattern feature to define how many I wanted and how far apart they need to be. Once complete I can now extrude them through the entire surface.

Lastly I will click start 2D sketch and choose to draw on the same face again for where the wing spar will go through. Drew my rectangle like the last sketch and dimensioned it. This time while I'm still extruding it I have able to define a depth so it didn't cut all the way through. I set it so that the spar would be centered in the foam.

At this point this drawing is done and it is saved and then uploaded into an assembly drawing. The assembly drawing is interesting as you have to look at everything and properly constrain the pieces together and there are lots of different constrain options. For example to join one wing panel to the fuse there are 3 different constraints that must be used. First I will use the "mate" feature and click on the edges of the long part of the keyway. Second I will use the mate feature again but this time it will be on the small angled portion in the key way. At this point the wing and fuse are perfectly aligned other that the wing may still be sitting a couple inches above the fuse. In comes the third constraint called flush. use this and click on the top face of the wing and the top face of the fuse and they will then be fully constrained to each other. This goes on and on with all the other pieces until you have an assembled model.

Now I'm to the point that I have probably thoroughly confused you.

Oh and might I mention the best part of 3D modeling is getting to use a space mouse. Things are freaking amazing.
 

Wild man

70cc twin V2
The red on the bottom was just to plane so I added some pin stripping Blue on top and some more pin stripping. Now the Air-Tractor has character. I have put 2 1/2 hours on this plane. Going out again tomorrow and get another hour on it. The Air Tractor is a fun plane to fly close to the ground in a figure 8
B1.jpg
red.jpg
 
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