Grant Tatham

Corryong Cup 2025 · Task 2 (Open) (Wed, 8 Jan 2025) · open · ranked #35 · times in Australia/Melbourne (GMT+11)

Scores computed

Landed out at 62.6 km — 358.2 points

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Click any highlighted step in the explanation to see where it happened.

The flight

What the tracklog shows, and which crossings scored.

Start time taken: gate 2 of 6 — the last start gate at or before the crossing. The speed-section clock runs from the gate, not from the crossing (FAI S7F §8.3.1).14:00:00

Day quality — points on offer

Task validity 100% of a perfect day, so 1000 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.100%

53 pilots flew out of 53 present. Nominal launch is 96%, so launch validity is full once 51 pilots are in the air.

Distance validity — the day counts for less if the field as a whole did not get far.100%

Measured against a 35.0 km nominal distance, a 30% nominal goal and a 5.0 km minimum distance. The field flew 64.2 km past the minimum on average, with a best of 88.4 km.

How far the field got — the spread distance validity is computed from, one dot per pilot. 53 pilots flew; you flew 62.6 km, further than 17 of them. The day averaged 64.2 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.100%

The fastest pilot took 1:45:13 against a nominal task time of 1:30:00 — the task took as long as it was meant to, so no time devaluation applies.

Points on offer for the day1000 pts

1000 × 1.00 × 1.00 × 1.00 = 1000

Split between the components: 29 of 53 pilots made goal — a goal ratio of 0.55

distance 405.7 · time 416 · leading 104 · arrival 74.3

The share each component takes of the day

distance 40.6% · time 41.6% · leading 10.4% · arrival 7.4%

Distance points

307.6 of 405.7 pts

36th furthest of 53

How this works

Task distance88.4 km

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

Scored distance62.6 km

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

Best distance in class88.4 km

Linear half — half the available points scale with your share of the best distance143.7 pts

0.5 × (62.65 km ÷ 88.43 km) × 405.7 = 143.7

Difficulty half — rewards flying past stretches where many pilots landed163.9 pts

The difficulty curve is built from where the whole field landed out (FAI S7F §11.1.1).

The curve is the distance-points formula, half of it built from where the field landed out (FAI S7F §11.1.1) — 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 62.6 km of the class best 88.4 km, worth 307.6 of 405.7.

Time points

0 of 416 pts

How this works

Time points are only awarded to pilots who reach the end of the speed section.

Leading points

50.6 of 104 pts

25th best of 51 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.50.6 pts

Your leading coefficient — the area under your distance-over-time curve, so lower means further ahead for longer7.085

Best in class 6.171.

Leading points fall off with the gap to the best coefficient50.6 pts

leading factor = max(0, 1 − ((LC − LCbest)² ÷ LCbest)^1⁄3) = 0.4865; × 104 available = 50.6

Measured with the classic squared-distance leading coefficient (S7F §11.3.1, the hang-gliding / GAP2016–2018 variant).

The curve is the leading-points formula — every dot is a pilot, sitting exactly on it. Your coefficient of 7.085 against the class best of 6.171 puts you at 50.6 of 104.

Arrival points

0 of 74.3 pts

How this works

Arrival points reward crossing the end of the speed section early relative to the other pilots who reached it.0 pts

29 pilots reached the end of the speed section on this task; the points scale with where in that group you crossed it (FAI S7F §11.4).

Total

358.2 of 1000 pts

How this works

Distance + time + leading + arrival, minus penalties358.2 pts

round(307.6 + 0.0 + 50.6, 1 dp) = 358.2

Where the points went

Your 358.2 against the 971.9 that won the class.

How this works

Distance−98.1 pts

you 307.6, the leader 405.7

Time−416 pts

you 0, the leader 416

Leading−25.3 pts

you 50.6, the leader 75.9

Arrival−74.3 pts

you 0, the leader 74.3

Behind Olav Opsanger−613.7 pts

Spread across time-points, distance-points, arrival-points and leading-points — time-points the largest, at 416.

Start cylinder (SSS): The circle around the start turnpoint. The race clock begins when you cross it in the required direction, or at the start gate you took.
Speed section: The timed part of the task: from the start to the end of the speed section. Time points are earned here, and only here.
End of speed section (ESS): Where the clock stops — usually a cylinder shortly before goal, so pilots are not racing all the way to the ground.
Optimized task line: The shortest legal way around the turnpoints, clipping each cylinder rather than flying to its centre. Every distance on this page is measured along it.
Made good: How far along that line you got — not how far you flew. Wandering off course adds kilometres to your track but none to your distance made good.
Minimum distance: A floor: a pilot who flies less than this is scored as if they flew it, so a short flight is never worth less than nothing.
Nominal distance / time / goal / launch: What the organiser expected of a good day — a typical task length, duration, share of pilots in goal, and share of pilots launching. They are the yardsticks the day is measured against, not targets anyone must hit.
Validity: How much of a full 1000-point day this task was worth. A day where few launched, nobody got far, or the winner was round very quickly counts for less in the overall standings.
Goal ratio: The share of flying pilots who made goal. It decides how the day's points are split between distance and the other components.
Leading coefficient: A measure of how much of the race you spent out in front, as an area under your distance-over-time curve. Lower is better; the absolute number means nothing on its own, only the comparison does.
Distance difficulty: Hang gliding only: half the distance points are weighted by where the field landed out, so getting past a stretch that stopped many pilots is worth more than easy kilometres.
Jump the gun: Starting before the first start gate opened. Paraglider pilots are scored only to the start cylinder; hang glider pilots take a penalty that grows with how early they were.

The full guide to GAP scoring

The flight

Day quality — points on offer

Distance points

Time points

Leading points

Arrival points

Total

Where the points went

Terms on this page