1
$\begingroup$

Generally, Carpet Plots are constructed to find out an optimal design which will satisfy all the performance needs and is least in weight & cost.

I want to know how to construct such a carpet plot. I have seen lines of constant weight in many carpet plots with T/W and W/S in the Y and X-axis respectively. But, I don't know how they constructed that constant weight line.

If there are some good references for constructing these types of sizing plots, please let me know.

$\endgroup$
1
  • $\begingroup$ Any book about general airplane design describes in a clear way carpet plots and how to plot them. You can find for example a list of books in this answer of mine $\endgroup$
    – sophit
    Oct 22, 2022 at 10:27

1 Answer 1

1
$\begingroup$

You might check out this package on the Matlab file exchange.

Set up a matrix or a grid of T/W and W/S. Then do your calculations and calculate weight, operating cost, or whatever metric you want for each T/W, W/S in the matrix.

Then, use a contour plotting routine to generate isolines (isoline means a line of constant value). Basically, the contour routine will interpolate from the values in your grid to find the location of your isoline.

Using contour plots like this is a very powerful technique to effectively 'invert' functions that are otherwise not invertible. This is a pretty direct application of the implicit function theorem f(x,y)=0.

The carpet plot toolkit linked above has some routines to help transform 'normal' contour lines onto a carpet plot. I believe the blue contours and also the red and green constraints depicted in the example were evaluated with a contour algorithm.

$\endgroup$

This site is temporarily in read-only mode and not accepting new answers.

Not the answer you're looking for? Browse other questions tagged .