David Drabble

Corryong Cup 2025 · Task 4 (Open) (Sat, 11 Jan 2025) · open · ranked #31 · times in Australia/Melbourne (GMT+11)

Scores computed

Made goal in 1:57:58 — 379.9 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 5 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).13:15:00

Completed the task — full task distance is credited.

Day quality — points on offer

Task validity 89.58% of a perfect day, so 895.8 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.100%

48 pilots flew out of 48 present. Nominal launch is 96%, so launch validity is full once 47 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 45.3 km past the minimum on average, with a best of 58.4 km.

How far the field got — the spread distance validity is computed from, one dot per pilot. 48 pilots flew; you flew 58.4 km, further than 13 of them. The day averaged 45.3 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.89.58%

The fastest pilot took 1:02:57 against a nominal task time of 1:30:00 — 70% of nominal.

Points on offer for the day895.8 pts

1000 × 1.00 × 1.00 × 0.8958 = 895.8

Split between the components: 35 of 48 pilots made goal — a goal ratio of 0.73

distance 330.7 · time 395.6 · leading 98.9 · arrival 70.6

The share each component takes of the day

distance 36.9% · time 44.2% · leading 11.0% · arrival 7.9%

Distance points

330.7 of 330.7 pts

Full distance — one of 35 pilots in goal

How this works

Task distance58.4 km

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

Scored distance58.4 km

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

Best distance in class58.4 km

Made goal — full available distance points.330.7 pts

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 58.4 km of the class best 58.4 km, worth 330.7 of 330.7.

Time points

34.9 of 395.6 pts

26th fastest of 35 through the speed section

How this works

Time points use the 5⁄6 speed-fraction exponent (the current FAI S7F, S7F §11.2).

Your speed section time1:57:58

Timed from your 13:15:00 start gate to the end of the speed section (FAI S7F §8.7) — you crossed the start at 13:16:19.

Fastest time in class1:02:57

Set by Scott Barrett — you were 55:01 behind.

Time points fall off with the gap to the fastest time34.9 pts

speed fraction = max(0, 1 − ((T − Tbest) ÷ √Tbest)^5⁄6) = 0.0881; × 395.6 available = 34.9 (times in hours)

The curve is the time-points formula — every dot is a pilot, sitting exactly on it. You were 55:01 behind the fastest time, which cost 360.7 of the 395.6 time points on offer.

Leading points

0 of 98.9 pts

40th best of 45 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 pts

Your leading coefficient — the area under your distance-over-time curve, so lower means further ahead for longer3.322

Best in class 1.278.

Leading points fall off with the gap to the best coefficient0 pts

leading factor = max(0, 1 − ((LC − LCbest)² ÷ LCbest)^1⁄3) = 0.000; × 98.9 available = 0

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 3.322 against the class best of 1.278 puts you at 0 of 98.9.

Arrival points

14.3 of 70.6 pts

34th of 35 to the end of the speed section

How this works

Arrival points reward crossing the end of the speed section early relative to the other pilots who reached it.14.3 pts

Reached the end of the speed section 34th of 3515:12:58

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 place14.3 pts

arrival ratio = 1 − (34 − 1) ÷ 35 = 0.057; arrival factor = 0.2 + 0.037·r + 0.13·r² + 0.633·r³ = 0.203; × 70.6 available = 14.3

One place earlier would have been worth 0.1 more points

The curve is front-loaded: first place takes all 70.6 available, and everyone else who reaches the end of the speed section keeps at least 14.2 of them.

The curve is the arrival-points formula — every dot is a pilot, sitting exactly on it. You arrived 34 of 35, worth 14.3 of 70.6 — one place earlier would have been 0.1 more. The order is by the clock at the end of the speed section, not by speed.

Total

379.9 of 895.8 pts

How this works

Distance + time + leading + arrival, minus penalties379.9 pts

round(330.7 + 34.9 + 14.3, 1 dp) = 379.9

Where the points went

Your 379.9 against the 750.3 that won the class.

How this works

Distancelevel

you 330.7, the leader 330.7

Time−360.7 pts

you 34.9, the leader 395.6

Leadinglevel

you 0, the leader 0

Arrival−9.7 pts

you 14.3, the leader 24

Behind Scott Barrett−370.4 pts

Most of the gap — 360.7 of 370.4 points — is time-points.

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