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From one ocean to the other

Everything Canadian pilots

need to know about IMAC

D'un océan à l'autre

Tout ce dont les pilotes

Canadiens ont besoin pour IMAC

Home arrow Maneuver info arrow Featured maneuver: Humpty Bump
Featured maneuver: Humpty Bump
How to do a Humpty Bump:
  • From horizontal flight, the airplane does 1/4 loop in to a vertical up line. It draws a perceptible up line.
  • On top, the plane does one half loop to a downline with a 1/2 roll in the middle the line.
  • The maneuver ends with a second 1/4 loop at the end of the down line to exit upright.

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According to the AMA Competition regulations, the length of the vertical lines does not have to match. The radios of the 1/2 loop on top may be different than the 1/4 loops of the bottom.  The following situations cause deductions:
  • The Entry and the exit radius of the quarter loops of the bottom do not match. Number of points deducted is at the discretion of the judge.
  • The partial loops must have a constant radius from the time they depart the vertical line. Any change in radius cause a penalty of 1 point.
  • Up & down vertical lines do not appear to the judge’s eye as a straight line perpendicular to the horizon. Each 5 degrees of deviation from vertical line will result in a 0.5 point deduction. This includes the case where the vertical lines are not properly wind corrected.
  • Any added elements such as rolls, snaps etc are not positioned so that the lines before and after the element are not equal. Perceptible difference: 1 point deduction, one line is twice as long as the other: 2 points deduction and the two lines are missing: 2 points deduction.
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