The attached picture shows the sails I just hot cut out for three 24 inch ultra-light Birds of Prey for fellow kite glider enthusiasts and my prototype ultra-light 48 inch Bird of Prey (the large one). Several people have asked, and at their request, I am building a limited number of the Bird of Prey 24 for others. The sail material is 0.35 oz./sq.yd. Cubic Tech Cuben fabric. The color is orange, which I am finding to be a better laminate than the whitish/grey material. Due to the light weight of this material, the orange is very light in color and looks great in the air. The good news is the sail material for each color weighs the same, even though the orange feels a little stiffer. I have had issues with the whitish/grey material and had to toss a couple sails that were in process, which is very painful due to the cost of this fabric at 25 to 30 dollars/yard. Thief's Bird of Prey that he posted under the Single Line section of this forum is made from the orange Cuben fabric. Thank you to thief for asking me to build my Bird of Prey 24 for him in the orange Cuben fabric, which will be the material I will use going forward.
The following link provides my recent video of my Bird of Prey 24 in flight, which is made from the whitish/grey Cuben fabric. Under the Single Line Section of this forum is my discussion regarding the fun I had making the video. Out of all of my glider kites, this one is my favorite.https://drive.google.com/file/d/0B_TPx1W-lkmSWjliWXlmNHVBN0k/edit?usp=sharing
As indicated under the Single Line Section of this forum, the 48 and 62 inch sizes made from PC31 in multi-colors are a work in process. They glide great, but I need to wait until the snow clears at our local sports fields to get a better launch. Using the PC31, the sail loading is higher and more typical for a glider kite of their respective sizes, so they need more room to run. The ever tinkering engineer in me is building an ultra-light version of the 48 inch to see what it can do in small areas, which sail is show in the attached picture. I hope to reduce the weight of the 48 inch kite by about 45 percent, mostly due to using the Cuben fabric and one panel of sail material.
Thank you again for your interest,