[Grant-53]

On a sailplane, the fuselage continues to a point. On your bike we are looking at a Kamm tail about 5" wide and maybe 24" +/- top to bottom. You would likely have three bulkheads including the end panels. By dividing the perimeters of each bulkheads into sections you can determine the dimensions of the skin pieces.

I use cardboard from cereal boxes to make 1/4 scale mockups. Skin material can be made from wire hex mesh glued between layers of .005" tarp plastic.