MI 23 - Slide and Square (Intermediate)

Compulsory figure from the series Multi-line individual figures.

Reference diagram

MI 23 - Slide and Square (Intermediate)

Official document: ISK Compulsories Book v3.0, p. 85

Official description

Judges will particularly consider

  • Position within the precision grid
  • Vertical lines
  • Horizontal slide
  • Parallel line
  • Relative placements of the components

Explanation

Launch (IN) and landing (OUT) are at the same point - centre of the grid, on the ground.

  1. The kite flies up forward in a straight vertical line up to 80% and then stops.
  2. The kite then flies backwards to 50% and then stops.
  3. The kite slides left to 30% left and then stops.
  4. The kite flies backwards to 20% and stops.
  5. The kite slides right to centre and stops.
  6. The kite flies backwards and lands.

Our reading

What follows is our reading of those documents, not an official document: the diagram and the description above are what counts.

Animation

Sequence

Doubts & discrepancies

Uncertain readings of the diagram or the official text, and disagreements between sources, to be validated. The animation follows the reading we chose, which is not an official interpretation.

No specific doubt or discrepancy about this figure.

Common to the whole family of figures

  • douteOverall speed: we chose a constant speed of 15 units per second (about 4.4 m/s with 37 m lines), without any flight measurement. The ISK requires a constant speed (§II.V) without giving a value.
  • douteKite size: our assumption is a wing 2.30 m wide, i.e. 8 grid units (1 unit ≈ 0.29 m with 37 m lines), with the proportions of the Hadzicki wing drawn in kite-physics; the dual-line wing has the same span. For the reference competition, we only found the scale of the grid (ISK §II.C: about 0.3 m for 38 m), not a kite size. At this size, the wings of a team overlap at times (MT 01, 02, 06 and 09). Lead: a smaller kite.
  • douteWe added a brief stop (0.25 s) before and after each rotation on the spot, and at each corner where the wing goes from one translation to another with a different leading-edge orientation. It does not appear in the list of steps, and the rules do not ask for it: they only mention the stops marked on the diagram or cited in the text.

Keep going

In the series Multi-line individual figures

  1. MI 20 - Lift (Experienced)
  2. MI 21 - Diamond (Master)
  3. MI 22 - The Felix (Experienced)
  4. MI 23 - Slide and Square (Intermediate) — you are here
  5. MI 24 - Basic Elevator (Novice)
  6. MI 25 - The Arch (Intermediate)
  7. MI 26 - The Arch with Stops (Experienced)

All 29 figures of the discipline

How to read ISK figures

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