blownwing branch

[rymanderson]

I added a function to analyses.jl that calculates total force coefficients at each chordwise section for plotting lift/drag distributions. Let me know what you think.

[taylormcd]

Thanks for the work on this. Turns out I need this functionality now, so I took a look and improved upon what was there to get me what I needed. It was basically a rewrite, but here are the things I aam adressing:

• getting moment coefficients as well as force coefficients
• make the reference parameters more intuitive
• performance improvements
• separate allocating and non-allocating Also, I renamed the function from spanwise_lift_coefficients to lifting_line_properties. I thought this was more appropriate since the resulting coefficients are still in the global frame. There's a lot of ambiguity about how to define section lift coefficients (which way is the chord, what direction is lift and drag in, what's the actual segment length, etc.) and I think the new formulation is a little bit more clear about those choices.

[taylormcd]

A couple things which I think would be helpful 1) Being able to choose between a global and local reference frame for force and moment coefficients extracted using lifting_line_properties 2) A validation case for section lift coefficients.

I think at the very least we should get a simple validation case for the section lift coefficients before merging this branch.

[taylormcd]

@rymanderson I added an option to specify the reference frame for the lifting line coefficients. I also added a unit test against section coefficients provided by AVL. This is probably ready to merge now.