Stuart Cathcart

Corryong Cup 2023 · Task 2 (Open) (Tue, 10 Jan 2023) · open · ranked #13 · times in Australia/Melbourne (GMT+11)

Scores computed

Made goal in 1:48:44 — 583.7 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 4 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).14:45:00

Completed the task — full task distance is credited.

Day quality — points on offer

Task validity 95% of a perfect day, so 950 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%

42 pilots flew out of 42 present. Nominal launch is 96%, so launch validity is full once 41 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 48.5 km past the minimum on average, with a best of 67.8 km.

How far the field got — the spread distance validity is computed from, one dot per pilot. 42 pilots flew; you flew 67.8 km, further than 13 of them. The day averaged 48.5 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.95%

The fastest pilot took 1:12:01 against a nominal task time of 1:30:00 — 80% of nominal.

Points on offer for the day950 pts

1000 × 1.00 × 1.00 × 0.95 = 950

Split between the components: 29 of 42 pilots made goal — a goal ratio of 0.69

distance 355.1 · time 594.9

The share each component takes of the day

distance 37.4% · time 62.6%

Distance points

355.1 pts

How this works

Task distance67.8 km

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

Scored distance67.8 km

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

Best distance in class67.8 km

Made goal — full available distance points.355.1 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 67.8 km of the class best 67.8 km, worth 355.1 of 355.1.

Time points

228.6 pts

How this works

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

Your speed section time1:48:44

Timed from your 14:45:00 start gate to the end of the speed section (FAI S7F §8.7) — you crossed the start at 14:55:13.

Fastest time in class (among pilots who made goal)1:12:01

Time points fall off with the gap to the fastest time228.6 pts

speed fraction = max(0, 1 − ((T − Tbest) ÷ √Tbest)^5⁄6) = 0.38436; × 594.86 available = 228.6 (times in hours)

The curve is the time-points formula — every dot is a pilot, sitting exactly on it. You were 36:43 behind the fastest time, which cost 366.3 of the 594.9 time points on offer.

Total

583.7 pts

How this works

Distance + time + leading + arrival, minus penalties583.7 pts

round(355.1 + 228.6, 1 dp) = 583.7

Where the points went

Your 583.7 against the 950 that won the class.

How this works

Distancelevel

you 355.1, the leader 355.1

Time−366.3 pts

you 228.6, the leader 594.9

Behind Olav Opsanger−366.3 pts

All of the gap is time.

Track data cleaning

1 of 2912 GPS fixes (<0.1%) carried an implausible altitude and were repaired before analysis — flagged by vertical-speed limits (no barometric channel to cross-check). Positions and times are never altered. How data cleaning works

14:15:22 · 1 fix · up to 901 m off

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

Total

Where the points went

Track data cleaning

Terms on this page