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Mar 15, 2013 at 10:27 comment added Oli Glaser @Anindo - I have also flown many kites, and it depends on e.g. how long the line is and how heavy (which we don't know yet) - a second tensioned roller as mentioned might work quite well. Plus we don't know how accurate this needs to be yet. It would certainly be worth a try IMHO, as it wouldn't be hard to set up.
Mar 15, 2013 at 10:26 comment added Oli Glaser I added a suggestion for your concerns about the length change and bend. It would help to know how accurate you want things to be and how much you are willing to spend. You could also try and combine a couple of ideas, such as the OpenCV together with the trigonometery (or something similar)
Mar 15, 2013 at 10:26 comment added Anindo Ghosh Having flown quite a few kites in my misspent youth, I can tell you that no matter what second string is used, and what tension, the kite will be drawn in way before the string even approximates a semblance of a straight line. Also, the sag is not just due to gravity, but also wind speed - hence not feasible to compute.
Mar 15, 2013 at 10:23 history edited Oli Glaser CC BY-SA 3.0
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Mar 15, 2013 at 10:12 comment added Oli Glaser Ah, okay - you said you keep the rope length constant in the question (we need as much info as possible to answer well ;-) ) How accurate do you need it to be? (in both height and direction) Even with a slight bend in the rope this should be pretty accurate. How long will the rope be and how much bend do you expect in the rope?
Mar 15, 2013 at 10:07 comment added kramer65 Thanks for the suggestion, but in the future I would like to be able to change the rope length. And with a very long rope length the rope can bend and the location is not directly related to the rope angles anymore.
Mar 15, 2013 at 9:59 history edited Oli Glaser CC BY-SA 3.0
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Mar 15, 2013 at 9:52 history edited Oli Glaser CC BY-SA 3.0
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Mar 15, 2013 at 9:26 history answered Oli Glaser CC BY-SA 3.0