Step 1...Figure length and number of flat-side panels.
√208 = 14.42 Because this is a measurement for one panel for one flat side, then
14.42 x 2 = 28.84
Allow 1 inch on each end for seam allowance, So each panel will be 29 feet long or 9 yards, 2 feet. This will span from the ground over the ridge pole and back to the ground on the other side.
Width of flat section is 12 feet (see shaded section of diagram) or 144 inches.
144 ÷ 33 = 4.36 So you will need 4 panels plus 1 foot for the flat side of the tent.
Step 2...Figure half of the circumference and divide that by the width of your canvas.
c=π2r ; c = 3.14 (16) = 50.26 feet or 603 inches.
Half this amount = 25.13 feet or 301.59 inches.
If fabric width is 35", then figure 33”. (seam allowance)
301.59 ÷ 33= 9.14 So you will need 9 panels plus 2 inches for each end of the tent. Using the Pythagoras Theorem,
A² + B² = C² or 144 + 64 = 208
√208 = 14.42 Allow 1 inch on each end for seam allowance, So each panel will be 14 feet 7 inches long or 4 yards,2 feet 7 inches.
Step 3...Rain/Shade Fly.
Step 4...Add up measurements.
For conical ends, round to 18 panels at 14 feet 7 inches = 262 feet 6 inches or 87 ½ yards.
For shade fly, 4 panels at 14 feet 7 inches = 58 feet 2 inches or 19 ½ yards
Grand total: 465 feet 8 inches or 155 ¼ yards
