- AIRFOIL SURFBOARD INSTALL
- AIRFOIL SURFBOARD ZIP FILE
- AIRFOIL SURFBOARD UPGRADE
- AIRFOIL SURFBOARD FREE
Using the Airfoil Import & Scale Macro, I bring in the desired Airfoil. Here is what I did to get from point A to B. No installation is required and it can happily work along side the other version of FreeCAD on your system.
AIRFOIL SURFBOARD ZIP FILE
That last version is a zip file that you just unzip the look inside for the "bin" directory, open that and click on FreeCAD. Don't worry about it being called "unstable", that's more of a reference to details of programming rather than implying its any more likely to crash or not.
AIRFOIL SURFBOARD INSTALL
So for you, I think you said you have Windows? If so and you don't want to compile (or install Linux ) then download the latest pre-compiled windows version which Werner posted on sourceforge.
AIRFOIL SURFBOARD UPGRADE
I have a feeling that what I am trying to do is quite advanced in FreeCAD.įirstly for this sort of somewhat advanced type of thing, upgrade to the most recent FreeCAD you can get as there have been quite a few improvements.
How do I change the position of the cloned b-spline on the z axis? How do I alter the size or scale of the b-spline? I can clone the b-spline but can't seem to change it's position on the z axis. The bspline has a red circular symbol in the labels and attributes window. When I convert the d-wire to a bspline, I get a bspline standard construction error. I have managed to import a NACA foil and that's about as far as I get. I want to try this first before I attempt Jim's method.
I am trying to construct a fine using Mark's method of lofting foils. I thought you guys might find this at least shows off some of the power and flexibility of FreeCAD! The bottom surface would then be created by selecting the bottom edges of the two sides.Ħ)then join them in a shell then convert the shell to a solid both with the Part wb "shape builder". A "ruled surface" is a specific mathematical concept, if you don't already know what it means, its best to look up "ruled surface" in Wikipedia where you will get a good explanation.ĥ) would be to make the other surface, if symmetrical just by using Part Mirror or there are other ways.
AIRFOIL SURFBOARD FREE
One is a "ruled surface from Part wb the other is a face from shape builder in Part wb.ġ)I just made one free hand b-spline in Draft WB on the xy plane.Ģ)then made a second longer Draft B-spline on the xy plane, using draft "snap to end" tool for the start and end points.Ģ) flipped the long one with the edit menu placement tool in "relative mode"ģ) used edit menu Alignment tool to exactly align the start and finish points of the two Draft B-splinesĤ) then in the Part WB use either "shape builder" to create a face or "Ruled surface" to create a ruled surface.įor anyone reading this, the two results are not identical. Surface_fin.fcstd (17.8 KiB) Downloaded 120 times I'll have to do another one now for a side by side comparison. The extrusions still have a little bit of irregularity, but nothing near as bad as it was back with OCC 6.5. Here is an old post of mine that shows the trouble I was having with the extrusion of an "Bslpined" airfoil. With the newest OCC, it has gotten much better. I'm sure that in the course of getting TK "on the path" we'll open up a rather mixed can of worms, and in the end, he, as well as others reading along, will find there is usually more than one way to get something done in FreeCAD.Īs to the use of the Bsplines. I've got a pretty good idea of it, but I'm still learning new things as well, and always interested to see how others do things. I for one would not mind seeing an example of that. For example if he had a side profile in a 2d format, and a base profile in a 2d format, you could possible work from that. There could be times where the data source is such that this method could be useful.
Just as a curiosity, I was thinking that another approach to this could be to define the edges, then build a surface then a shell then a solid.
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