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How can I calculate the takeoff, landing, and cruise speeds of my ultralight with a total weight (with load) of 120 kg, average air density of 1.23 kg/m3, wing area of 13.18 m2, and a coefficient of lift 1.15?

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  • $\begingroup$ Do you have a Pilot's Operating Handbook (POH) for the plane? There should be charts in it to help you determine speeds. $\endgroup$ – CrossRoads May 15 '18 at 12:19
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    $\begingroup$ @CrossRoads Judging by OP's previous activity on the site (as well as the description in their profile), they are building their own airplane. So no, there is almost certainly no POH, or any other data for that matter beyond what OP has been able to determine on their own. $\endgroup$ – a CVn May 15 '18 at 13:55
  • $\begingroup$ @CrossRoads please post answers in the answer field, not in the comments. $\endgroup$ – Federico May 17 '18 at 6:58
  • $\begingroup$ Question should deleted, OP has another post with same question where it is further noted he is building a plane from scratch with data, such as POH, available. $\endgroup$ – CrossRoads May 17 '18 at 12:23
  • $\begingroup$ @CrossRoads I see no such post. Please link. $\endgroup$ – a CVn May 17 '18 at 12:41

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