Archives for the month of: September, 2011

Just thought I would quickly post about a useful tool I just learned about.

I was working on tracing the Cozy main wing airfoil templates with splines in SolidWorks (more on this in a later post) and wanted to bring the traced airfoil section into XFLR5. SolidWorks unfortunately has no ability to export a list of coordinates from a spline, the best I could do was to export it as a DXF with splines converted to polylines. The problem now was to turn this DXF into a coordinate file.

It seems there are a lot of tools and information available on making a DXF file from an airfoil coordinate file but very little about doing the reverse. It all seemed hopeless until someone told me about Profscan. Its a nifty little utility that can import a DXF (or a number of other formats) and export an airfoil coordinate DAT file.

One tip is it seems like Profscan only supports older versions of the DXF format so in order for it to successfully load the DXF file I had to convert it to Release 2.5 format using SolidWorks DWGeditor.

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Welcome to this new blog documenting the development of a new canard aircraft design.

For many years I have thought about the possibility of building my own aircraft but it wasn’t until about a year ago when I took the plunge and purchased a set of plans for the Cozy MKIV (#1620) that the idea started to feel like a reality.

The Cozy is a fantastic airplane but after studying the plans and with my background in composites I felt like I wanted to take a different approach to the construction. The main differences would be building the at least the fuselage in a mould and incorporating carbon fibre to save weight. I am also keen to streamline the fuselage for aerodynamic and aesthetic reasons and this was a big factor in the decision to use a mould as this removes the restrictions on what shapes you can build using the Rutan construction technique. The plan, at least for the moment, is to not alter the already well proven design of the wing, winglets and canard.

That’s all for now!

Fergus Noble