Sails from tents

I have been thinking about making a sail from old tents. Think that they are made of ripstop nylon. They are a pretty common item at the second hand stores here.

Any one ever try this?

I would suggest doubling over the seams and giving it an extra row of stitching. this is what they do with shade sails here in Oz.
and try to get the directions of the weave lining up with the stresses.
Its been done before ,and successfully ,so go for it

I like the Beaufort scale, nice to be able to quantify the wind to a certain degree. I can see how making observations from your environment can help to predict the wind conditions and the kind of sailing day to anticipate. This is my first wind sport and I am becoming really fascinated by the physics involved. The more you know the faster you Go!