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I cannot find a generic takeoff chart for the 850 lbs BD-5B Micro-plane. How can I find, generate, or calculate the takeoff and landing distances needed? I did find this chart below and included the specifications. Please provide an example I can follow and learn from. enter image description here enter image description here

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    $\begingroup$ That is definitely not an ultralight! $\endgroup$ Jan 13, 2023 at 0:17
  • $\begingroup$ @quietflyer what would you call it? $\endgroup$ Jan 13, 2023 at 2:10
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    $\begingroup$ I'd call it fun! $\endgroup$
    – GdD
    Jan 13, 2023 at 13:19
  • $\begingroup$ @Justintimeforfun At least in the US, an ultralight must be less than 254 lbs. and carry 5 gallons or less of fuel. Since this plane has a gross weight of 850 lbs. and carries 26 gal. of fuel, it can't be an ultralight. $\endgroup$ Jan 13, 2023 at 18:38
  • $\begingroup$ You need the values of at least thrust, weight wing surface, density and maximum $C_l$, obviously all at takeoff. I think everything is know except max $C_l$ (?) $\endgroup$
    – sophit
    Jan 13, 2023 at 19:22

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