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Watching this video I was asking myself, what was the error or cause of this unsuccessful take-off?

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    $\begingroup$ the video has some comments under it, which seem to explain what was wrong in this take off $\endgroup$ – user907860 Nov 18 '14 at 16:24
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    $\begingroup$ Simple: the pilots did not do their pre-flight calculations. $\endgroup$ – GdD Nov 18 '14 at 16:28
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Comments under the video say clearly:

According to Transportation Safety Board (Canada) report # AO7W0128,

  1. Take-off weight did not meet performance capabilities of the Aircraft.
  2. Calculations to clear 50ft obstacle were not performed.
  3. Southeast end of runway, not clearly marked.
  4. Take-off was attempted in an up slope direction with a slight tailwind which increased the necessary distance to clear a 50ft obstacle.
  5. Center of gravity (CG) calculations were off and found to be too far forward.
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  • $\begingroup$ You might add that the pilot tried to rotate too early (twice), instead of letting speed build up to proper rotation speed. $\endgroup$ – Peter Kämpf Nov 18 '14 at 19:46
  • $\begingroup$ In the official report, I do not see a mention of the pilot rotating too early. $\endgroup$ – abelenky Nov 18 '14 at 20:07
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    $\begingroup$ It can be seen in the video. An then the plane lifts one wing, while the other is stalled - because the pilot tried to rotate with inadequate speed. $\endgroup$ – Peter Kämpf Nov 18 '14 at 21:04
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    $\begingroup$ One is at about 1:44, where he rotates far enough to lift the front wheel clean up $\endgroup$ – Jon Story Nov 18 '14 at 22:17

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