James McGinty

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

Scores computed

Landed out at 26.4 km — 188.2 points

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

Check this tracklog

Flagged

Track shows no sign of flight
Nothing in this track looks like flying: the best sustained climb is — m/s over 120 s (a glider does 1.5 m/s), and the best sustained glide sinks — m/s at a minimum ground speed of 0.0 m/s with 0% straightness. That is the profile of a vehicle — a vario left recording the drive to launch — rather than a flight.

How track validity checks work

The flight

What the tracklog shows, and which crossings scored.

How this works

Crossed the start cylinder boundary 12 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 13:59:35 crossing is the scored start. By the 14:26:18 crossing the flight had already reached TP2 (KANGCK), so treating that as a re-start would mean flying the course again from there — a shorter, later run that scores less.

Day quality — points on offer

Task validity 44.71% of a perfect day, so 447.1 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%

26 pilots flew out of 26 present. Nominal launch is 96%, so launch validity is full once 25 pilots are in the air.

Distance validity — the day counts for less if the field as a whole did not get far.60.45%

Measured against a 50.0 km nominal distance, a 20% nominal goal and a 5.0 km minimum distance. The field flew 16.3 km past the minimum on average, with a best of 28.1 km.

How far the field got — the spread distance validity is computed from, one dot per pilot. 26 pilots flew; you flew 26.4 km, further than 12 of them. The day averaged 16.3 km past the 5.0 km minimum, against a 50.0 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.73.97%

The fastest pilot took 46:45 against a nominal task time of 1:30:00 — 52% of nominal.

Points on offer for the day447.1 pts

1000 × 1.00 × 0.6045 × 0.7397 = 447.1

Split between the components: 12 of 26 pilots made goal — a goal ratio of 0.46

distance 196.2 · time 219.6 · arrival 31.4

The share each component takes of the day

distance 43.9% · time 49.1% · arrival 7.0%

Distance points

188.2 pts

How this works

Task distance28.1 km

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

Scored distance26.4 km

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

Best distance in class28.1 km

Linear half — half the available points scale with your share of the best distance92 pts

0.5 × (26.38 km ÷ 28.11 km) × 196.17 = 92

Difficulty half — rewards flying past stretches where many pilots landed96.1 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 26.4 km of the class best 28.1 km, worth 188.2 of 196.2.

Time points

0 pts

How this works

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

Arrival points

0 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

12 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

188.2 pts

How this works

Distance + time + leading + arrival, minus penalties188.2 pts

round(188.2 + 0.0, 1 dp) = 188.2

Where the points went

Your 188.2 against the 441.8 that won the class.

How this works

Distance−8 pts

you 188.2, the leader 196.2

Time−219.6 pts

you 0, the leader 219.6

Arrival−26.1 pts

you 0, the leader 26.1

Behind Hughbert Alexander−253.6 pts

Most of the gap — 219.6 of 253.6 points — is time.

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

Check this tracklog

The flight

Day quality — points on offer

Distance points

Time points

Arrival points

Total

Where the points went

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