Ski Jump Aerodynamics Simulator — The "Package" Effect

The Physics (seriously)

A ski jumper in flight is essentially a human aerofoil. The two key aerodynamic forces are:

Lift: F_L = ½ · ρ · v² · C_L · A | Drag: F_D = ½ · ρ · v² · C_D · A

Where A is the effective surface area, ρ is air density (≈1.225 kg/m³), and v is airspeed. FIS limits suit permeability and fit allowances (commonly around 2-4 cm, with women's 2025/26 guidance extending some zones to 2-5 cm). Even a few hundred cm² of extra fabric meaningfully increases A, boosting lift more than it penalises with drag — because the jumper's body angle optimises the lift-to-drag ratio. The "anatomical enhancement" trick reportedly adds ~200-500 cm² of suit slack in the groin/thigh region, which is enough for 1-5+ extra metres of flight.

Jump Parameters

Launch Speed 90 km/h

Launch Angle 11°

Jumper Mass 65 kg

Skier Height 175 cm

Wind (headwind +) 0.0 m/s

Gust Strength 0.0 m/s

Wind Shear 0.000 m/s/m

Suit Aerodynamics

Base Suit Area 1.20 m²

Added Length 0.0 cm

Added Girth (Circ.) 0.0 cm

Plausible concealment band is about 100-500 cm² computed extra area.

FIS fit reference: men are typically checked around 2-4 cm suit allowance; women (2025/26 update) 2-5 cm torso/legs, 2-4 cm sleeves, and up to 2 cm crotch offset.

Equivalent added circumference across ~80 cm panel span: 0.0 cm.

Computed supplemental area: 0 cm².

Lift Coefficient (C_L) 0.90

Drag Coefficient (C_D) 0.55

Body Pitch 19.0°

Ski V-angle 30.0°

Hill Profile

Hill Preset

Hill Size (HS) 109 m

K-point 98 m

Hill Slope Angle 35°

In-run Angle 32.0°

In-run Length 93.5 m

K-point (K98): scoring reference at 98 m. Jumps are measured for distance points relative to this point.
Hill size (HS109): hill-size reference at 109 m, measured to the end of the main landing area.

Broadcast Mode

Commentary Style

Results

Distance

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Flight Time

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Max Height AGL

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Extra Area Bonus

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Avg L/D

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Avg AoA

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Steward Suspicion Meter

No steward concerns yet.

Set a launch and see what the judges gossip about.