I started with a piece of fabric 12'x5'. For now I am using cheap walmart cotton fabric. Below is a pic of the diagram I used.
1. I measured down 2'4" on one side and drew a line to the opposite corner. On the opposite side a drew the same line starting in the opposite corner. This is a little hard to explain, the diagram above shows it a little clearer. I cut the fabric along the line. This gave me a trapezoid with the angles of 65 degrees and 115 degrees.
2. I measured along the top edge a length of 66". I measured over 1/3 this distance (22") from the short edge of the trapezoid. I then followed the directions Arkwater posted with the expection of knotting the ends.
Below is a pic of the foot end.
Below is a pic of the head end.
Sorry for the self portaits, but there was no one else around. The finished product allowed me to lay realitively flat on the diagonal and was pretty comfortable. The finished distance knot to knot was about 8'. I am still new to the homemade hammocks area, so this is a work in progress. I need to make the sides a little tighter and work on my hanging (getting the sag right vs the HH).
I tried a couple different larger angles, but 75 degrees felt the best. I think angles too much smaller than that would not work out very well in terms of comfort or construction.
It uses about 10.7 square yds of fabric. 1.1 oz ripstop would give a fabric weight of 11.7oz and 1.9 oz would give 22.oz.
Any thoughts or suggestions?