Why the winner need not be the longest jumper: how the FIS compensates wind and gate — and what competition data say about the accuracy of that calculation.
In ski jumping the winner is not whoever jumps furthest but whoever stands best after wind and gate are subtracted — and that calculation is better than its reputation, yet measurably not perfect. Since January 2010 the FIS compensates both: wind is measured at 5 points (normal hill), 7 (large hill) or 10 (flying hill) depending on hill size and processed as a weighted average, because it acts differently in different flight phases; headwind leads to a points deduction, tailwind to a credit, and the gate factor compensates changes in in-run length via the altered in-run speed [1].
How large the effect this system is meant to catch can be is shown by optimisation research: a flight posture adapted to the wind is worth 0 to 1.8 metres on the large hill, and on the flying hill at ±3 metres per second even 6.9 metres in headwind and 14.4 metres in tailwind [2]. Wind in ski jumping is not a boundary condition. It is a player.
And the honest answer to the title question: a meta-analysis across all men's World Cup and World Championship competitions of two seasons finds a systematic relationship between wind and gate points and the round result [3]. No accusation, no scandal — but a residue that does not disappear.
Because wind and gate change the jump before the jumper can do anything. Neither is performance; both are conditions. The FIS therefore measures wind repeatedly along the flight path and weights the measuring points, because wind acts with different strength in different flight phases [1].
Five, seven or ten measuring points depending on hill size, processed into a weighted average; headwind costs points, tailwind gains them [1]. The logic behind it is the classical assumption that headwind carries and tailwind costs.
A model analysis shows that in the first flight phase tailwind can increase distance and headwind reduce it — the opposite sign to the basic assumption, which the current system does not represent; at the same time the mean length effect in the compensation system was set 48 percent (headwind) and 22 percent (tailwind) too low [1]. So the calculation works, it just does not work equally well everywhere.
The meta-analysis across all men's World Cup and World Championship competitions of two seasons (k = 35 and k = 30 competitions) finds: wind points relate systematically negatively, gate points positively, to the round result [3]. And the relationship becomes stronger the greater the scatter of wind points — so compensation becomes less accurate under more variable conditions, with a trend towards larger deviations on bigger hills [3].
The magnitude comes from wind optimisation research: optimal angles of attack are smaller in headwind and larger in tailwind than in calm air; the adaptation is worth 0 to 1.8 metres on the large hill and, on the flying hill at ±3 metres per second, 6.9 and 14.4 metres [2]. Knowing these numbers explains why compensation is needed at all.
Soberly: the system removes the lion's share of the condition effect, and it is more accurate in even conditions than in gusty ones [3]. A single result is therefore not wrong, but it is also not a pure performance measurement. Reading ski jumping analytically means reading results as performance plus residual condition.
This guide analyses a rules and scoring system, not technique. It contains no jump, flight or equipment instruction — and explicitly no recommendation to make wind or in-run decisions yourself. Those decisions belong to the jury and coaching team, for safety reasons: in-run length and wind windows are competition safety, not individual tactics.
On the strength of the statements: the meta-analysis shows relationships in competition data, not causality [3]; the model calculations are simulations, not measurements of individual jumps [1][2]. Turning that into "the compensation is wrong" overstretches the evidence.
And as everywhere at the hill: this text explains and motivates, it never replaces supervised training in a club or at the hill. Separate understanding from execution.
When you watch a competition analytically, note not the distances but the scatter of the wind points across the round. That is where the message sits: the more the wind points fluctuate, the more closely they relate to the round result — compensation becomes less accurate under variable conditions [3]. A calm round is a clean comparison, a gusty one is a comparison with noise. That single number tells you more about a competition's meaningfulness than any distance table.
Strongly enough that it gets calculated out. Since January 2010 the FIS measures wind at 5, 7 or 10 points depending on hill size and applies a weighted average; headwind brings a deduction, tailwind a credit [1]. How large the effect is physically is shown by optimisation research: 0 to 1.8 metres on the large hill, and on the flying hill at ±3 metres per second 6.9 and 14.4 metres respectively [2].
Because the result consists of distance, style scores from five judges up to a maximum of 60 points [4] and the wind and gate correction [1]. A long jump with strong tailwind and a long in-run can end up behind a shorter jump under worse conditions once corrected.
On average yes, but with a measurable residue. A meta-analysis across all men's World Cup and World Championship competitions of two seasons (k = 35 and k = 30) found wind points systematically negatively and gate points positively linked to the round result, with larger deviations under greater scatter of wind points and a trend on bigger hills [3].
It compensates changes in in-run length: a different gate means a different in-run speed — on big hills take-off speed is around 90 km/h [5] — and therefore a different starting position for the jump. The factor calculates that difference out so a gate change during a round does not destroy the comparison [1].
Maximum Distance: Weight/BMI Rules, Wind Compensation and Recovery in Competition