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Mitch Butler

Corryong Cup 2017 · Task 4 (Floater) (Sat, 14 Jan 2017) · floater · ranked #1 · times in Australia/Melbourne (GMT+11)

Officially: 1st · 50 pts (AirScore)

Scores computed · FAI S7F 2026

Made goal in 14:49 — 11.8 points

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The flight

What the tracklog shows, and which crossings scored.

How this works

Crossed the start cylinder boundary 5 times. The scored start is the latest crossing from which the flight still makes its best run along the course — re-starting supersedes an earlier start, while simply flying back through the cylinder later in the task changes nothing.
The 14:04:44 crossing is the scored start. By the 14:28:14 crossing the flight had already reached Goal (CORRY), so treating that as a re-start would mean flying the course again from there — a shorter, later run that scores less.
Completed the task — full task distance is credited.

Day quality — points on offer

Task validity 1.176% of a perfect day, so 11.8 of 1000 points were available.

How this works

Launch validity — the day counts for less if much of the field never got into the air.77.514%

4 pilots flew out of 6 present. Nominal launch is 96%, so launch validity is full once 6 pilots are in the air.

Distance validity — the day counts for less if the field as a whole did not get far.4.635%

Measured against a 35.0 km nominal distance, a 30% nominal goal and a 5.0 km minimum distance. The field flew 0.9 km past the minimum on average, with a best of 6.7 km.

How far the field got — the spread distance validity is computed from, one dot per pilot. 4 pilots flew; you flew 6.7 km, further than 3 of them. The day averaged 0.9 km past the 5.0 km minimum, against a 35.0 km nominal distance.
Time validity — the day counts for less if the fastest pilot got round much quicker than the task was meant to take.32.732%

The fastest pilot took 14:49 against a nominal task time of 1:00:00 — 24.7% of nominal.

Points on offer for the day11.8 pts

1000 × 0.77514 × 0.04635 × 0.32732 = 11.8

Split between the components: 1 of 4 pilots made goal — a goal ratio of 0.25

distance 6.8 · time 3.4 · leading 0.9 · arrival 0.6

The share each component takes of the day

distance 58.2% · time 29.3% · leading 7.3% · arrival 5.2%

Leading weight follows the FAI S7F 2026 §11 formula: 18% of the non-distance weight (the task's Leading Time Ratio) goes to leading.

Distance points

6.8 of 6.8 pts

Full distance — the only pilot in goal

How this works

Task distance6.7 km

The optimized task line — the shortest legal way round the turnpoints.

Scored distance6.7 km

Measured along the optimized task line, up to the furthest point on course.

Best distance in class6.7 km
Made goal — full available distance points.6.8 pts
The curve is the distance-points formula, half of it built from where the field landed out (FAI S7F §12.1.1) — every dot is a pilot, sitting exactly on it. Its steepest stretches are the ones fewest pilots got past, so flying through one is worth more than the same distance somewhere easy. You flew 6.7 km of the class best 6.7 km, worth 6.8 of 6.8.

Time points

3.4 of 3.4 pts

How this works

Your speed section time14:49
Fastest time in class14:49
Fastest through the speed section — full available time points.3.4 pts

Leading points

0.9 of 0.9 pts

Best of 4 measured leading coefficients

How this works

Leading points reward flying out front during the speed section — the pilot with the best leading coefficient takes all available leading points, others fall off with the gap.0.9 pts
Your leading coefficient — the area under your distance-over-time curve, so lower means further ahead for longer0.139

The best in the class — no one spent more of the race out front, so this takes the full available leading points.

Measured with the squared-distance leading coefficient (S7F §12.3.1, the hang-gliding variant).
The curve is the leading-points formula — every dot is a pilot, sitting exactly on it. You hold the best coefficient in the class, so you take all 0.9 leading points.

Arrival points

0.6 of 0.6 pts

How this works

Arrival points reward crossing the end of the speed section early relative to the other pilots who reached it.0.6 pts
Reached the end of the speed section 1st of 114:19:33

The arrival order is by the clock at the end of the speed section, not by speed — an earlier start gate can put a slower pilot ahead of a faster one here.

Arrival points fall off steeply with each rank0.6 pts

arrival ratio = 1 − (1 − 1) ÷ 1 = 1.00; arrival factor = 0.2 + 0.037·r + 0.13·r² + 0.633·r³ = 1.000; × 0.6 available = 0.6

First to the end of the speed section — the full available arrival points.

Total

11.8 of 11.8 pts

How this works

Distance + time + leading + arrival, minus penalties11.8 pts

6.8 + 3.4 + 0.9 + 0.6 ≈ 11.8 — the points above are shown rounded to 0.1; the total is rounded from their exact sum.