Deluxe Ski Jump Forum

According to a recent discussion with Jussi, wind speed should not depend on what time of day a race takes place. I quickly collected some data on this and there's a clear dependence: wind speeds are notably stronger at night. Therefore this is a bug, albeit not a major one.

NIGHT classification: lights switched on

DAY
Average wind speed (estimated, from 15 cases): 0.72 m/s
Highest avg: 1.5 m/s
Lowest avg: 0.3 m/s

NIGHT
Average wind speed (estimated, from 15 cases): 1.68 m/s
Highest avg: 2.1 m/s
Lowest avg: 1.4 m/s

Highest daytime winds occurred at twilight when lights were not yet needed. The average daytime wind speed would possibly be higher if I had more races at twilight time. Lowest winds of course occurred when it was closer to noon. Night-time wind speeds never dropped below 1 m/s.

The data was collected doing races with a single jumper, simulating an online situation. Wind behavior in longer offline competitions might not be accurately known.

Risto Salonen wrote:According to a recent discussion with Jussi, wind speed should not depend on what time of day a race takes place. I quickly collected some data on this and there's a clear dependence: wind speeds are notably stronger at night. Therefore this is a bug, albeit not a major one.

NIGHT classification: lights switched on

DAY
Average wind speed (estimated, from 15 cases): 0.72 m/s
Highest avg: 1.5 m/s
Lowest avg: 0.3 m/s

NIGHT
Average wind speed (estimated, from 15 cases): 1.68 m/s
Highest avg: 2.1 m/s
Lowest avg: 1.4 m/s

Highest daytime winds occurred at twilight when lights were not yet needed. The average daytime wind speed would possibly be higher if I had more races at twilight time. Lowest winds of course occurred when it was closer to noon. Night-time wind speeds never dropped below 1 m/s.

The data was collected doing races with a single jumper, simulating an online situation. Wind behavior in longer offline competitions might not be accurately known.

Seems weird, but i'm not sure if i inderstand it. You did this:

1. Clicking 'World Cup' (with 1 jumper)
2. jumping 2 jumps and writing wind speed down
3. going back to menu

But you did this 15 times, right?

Dydux666 wrote:Seems weird, but i'm not sure if i inderstand it. You did this:

1. Clicking 'World Cup' (with 1 jumper)
2. jumping 2 jumps and writing wind speeds down
3. going back to menu

But you did this 15 times, right?

I jumped a few World Cups (with all hills, qualification rounds included) until I got enough cases which was 15 day AND night races. I wrote them down on a piece of paper. Note the wind speeds averages are estimations that shouldn't be too far off reality.

LOL, it's funny, shouldn't it be compeletly random?

But it could be feature in Sapporo, these competitions are really windy...

Dydux666 wrote:LOL, it's funny, shouldn't it be compeletly random?

But it could be feature in Sapporo, these competitions are really windy...

dont forget lahti

I just noticed this is offline only.

I had a look on this and found out that this correlation may exist (depending on the timing) if you are jumping with 1 ski jumper / 1 team.
I'll fix it to v1.1.1.