gwicke wrote:
For the kites that don't have the data published I looked for photos from the rider's perspective (straight below). Then I used a photo editor (Gimp) to cut out the kite outline & measured kite span and area in pixels. Projected AR is span² / area. Accuracy seems to be decent, as I got closely matching results from several different photos of the same kites.
Your Measurement of the projected AR of the 11.5 Ace is 5.43 while North states it to be 4.90, that is quite a difference! Or is the North-data faulty?
https://www.northkiteboarding.com/products/kites/ace/
Size - AR flat - AR projected - S flat in m² - S projected in m²
8,5 - 6,70 - 4,80 - 8,50 - 7,10
11,5 - 6,70 - 4,90 - 11,50 - 9,50
14,5 - 6,90 - 5,00 - 14,50 - 11,90
17,5 - 7,00 - 5,00 - 17,50 - 14,30
Size Cells - Longest Rib in m - Smallest Rib in m - Weight in kg
8,5 - 53 - 1,36 - 0,35 - 1,90
11,5 - 53 - 1,57 - 0,44 - 2,28
14,5 - 53 - 1,75 - 0,44 - 2,70
17,5 - 53 - 1,90 - 0,49 - 2,88