How Do Ski Jumpers Stay in the Air So Long?

Ski jumping flight works on the same aerodynamic principles as airplane wings. When a jumper leaves the takeoff table at 90+ km/h, three forces determine what happens next:

1. Lift — The upward force generated by air flowing over the jumper's body and skis. By adopting a flat, forward-leaning position with skis spread in a V-shape, the jumper creates a large surface area that deflects air downward. Newton's third law means the air pushes the jumper upward in return. This lift force is what keeps jumpers airborne far longer than a simple projectile trajectory would allow.

2. Drag — The air resistance that slows the jumper down. Jumpers minimize drag by keeping their body as tucked as possible, arms tight against the body, chin tucked, suit fitted aerodynamically. Less drag means more forward speed, which in turn generates more lift.

3. Gravity — The constant downward pull. A ski jumper is always falling, but the lift force significantly slows the rate of descent. A jumper in optimal position may descend at only 2-3 meters per second vertically while traveling 25+ meters per second horizontally.

The result: what looks like "floating" is a carefully balanced equation where lift nearly counteracts gravity, allowing the jumper to cover massive horizontal distances before touching down.

Before 1985, ski jumpers held their skis parallel during flight — tips together, forming a narrow profile. Then Swedish jumper Jan Boklöv began spreading his ski tips apart in a V-shape. The ski jumping establishment initially penalized him with lower style scores, but the aerodynamic advantage was undeniable: the V-style generates approximately 28% more lift than the parallel technique.

Here's why the V-style works so well:

• Increased surface area — Spread skis create a wider "wing" that catches more air, generating significantly more lift
• Better angle of attack, The V-shape allows the jumper to present the optimal angle to the oncoming airflow
• Body integration, The jumper's body fits between the V, creating a continuous lifting surface from ski tip to ski tip
• Stability, The V-shape gives natural lateral stability, similar to a paper airplane's wings

By the early 1990s, every competitive ski jumper had adopted the V-style. Boklöv won the 1988-89 World Cup overall title, and the technique has been universal ever since. Today's jumpers refine the exact angle of the V (typically 30-35 degrees per ski from the center line) based on wind conditions and personal preference.

A ski jumper's body position in flight is incredibly precise. Every centimeter of adjustment affects distance:

Forward lean: Jumpers lean their upper body forward at roughly 45-50 degrees from horizontal. This creates a flat surface that generates lift, similar to tilting your hand into the wind from a car window. Too upright = not enough lift. Too flat = dangerous instability.

Arm position: Arms are pressed tightly against the body or slightly behind, never extended. Extended arms would create turbulence and drag. Elite jumpers keep their arms so close that their hands nearly touch their thighs.

Head position: The chin is tucked down and forward. The helmet is as smooth as possible, minimizing the air turbulence that the head creates.

Suit regulations: FIS regulates suit material, thickness and air permeability to the millimeter. Under the 2026/2027 specifications a men's suit must be between 2.0 and 4.0 cm larger than body circumference at any point and a women's suit between 2.0 and 5.0 cm from armpit to knee, while the fabric must measure between 4.0 and 6.0 mm thick. The rules exist so that technique, not tailoring, decides results. Suits are measured and chipped before competition.

Ski length: Skis may be at most 145% of the jumper's height, and only for athletes at a body mass index of 21 or above. Below BMI 21 the ceiling drops by half a percentage point for every 0.125 of BMI, so a jumper who loses weight also loses lifting surface. Taller jumpers get proportionally longer skis; lighter ones do not.

Every surface that carries a ski jumper in flight is dimensioned by rule. Under the FIS Specifications for Competition Equipment, Edition 2026/2027 (Oberhofen, May 2026), a men's suit must be between 2.0 and 4.0 cm larger than the athlete's body circumference at any point, the fabric must measure 4.0-6.0 mm thick, and skis are capped at 145% of body height.

That is the argument of this guide restated as regulation. Lift comes from surface area, so FIS governs ski jumping by governing surface area — and since 2025 it has done so with a body scanner, a porosimeter and a chip reader rather than a tape measure alone.

Two of the suit's numbers come from a 3D body scan

Two of the figures a legal suit is cut against come from a machine rather than a tape. FIS scans competitors on a Scaneca 3D scanner, which records body height and crotch height — the numbers behind the ski-length ceiling and the crotch and leg-length checks. Arm length, foot length and wrist circumference are measured separately, the foot to an accuracy of 0.5 cm, and every suit circumference tolerance is still taken with a tailor's tape against the athlete's body.

The 2026/27 deadline is hard: every athlete's 3D body scan must be completed by the end of October 2026, with exceptions only for FIS-registered injured athletes. Scans taken for 2025/26 remain valid only until the same date. The World Cup season opens with a mixed team event in Lillehammer on 20 November 2026, so the measurement window closes roughly three weeks before the first competition gate.

The scan is a controlled procedure. It runs in the presence of measurement controllers and medical personnel; the athlete verifies identity and signs a consent note, wears standardized slips supplied by FIS, ties long hair clear of the ears, and stands with legs extended and feet 30 cm apart. For the crotch-height reading the knee angle must not exceed 172 degrees. Once an athlete has been scanned, manual re-measurement is prohibited, and a second measurement within the same calendar year is not permitted unless the equipment controller calls for a re-measurement after an irregularity. Athletes up to the age of 20 are re-measured annually, and only a larger value counts.

How much loose fabric the rules allow

No circumference reading is taken at the under-bust for women. Every circumference is measured at 90 degrees to the body axis with a tailor's tape, and the suit is measured on its outer surface while stretched flat without folds. When the athlete wears the suit for measurement, the elbows must be 30 cm from the body and the feet 30 cm apart.

Air permeability is measured, not estimated

The fabric must be bi-elastic with a textile surface on both sides, built as five layers — outer textile, foam, membrane, foam, white lining — with the membrane centered to within 0.5 mm. Unstretched, it must pass at least 40 liters per square meter per second at 10 mm water pressure.

The finished suit carries a second, stricter test: the difference in air permeability between all parts of the suit must not exceed 20 l/m2/sec. That rule closes the loophole of building one deliberately tight panel into an otherwise legal suit. Readings are taken with a Steinel porosimeter. If a first reading falls below 40, the controller retests two randomly chosen spots on that panel; if two of the three readings fall short, the athlete is disqualified or not permitted to start.

Five chips for men, three for women

Suits used at the Olympic Winter Games, the World Championships, the Ski Flying World Championships, the World Cup and the Grand Prix must be marked before the event, and only suits that pass technical approval are marked. Marking means five uniquely encoded NFC chips for men and three for women, heat-pressed into pre-defined positions on the inside surface and registered in a FIS database against the athlete's name.

An athlete may use one suit per competition day, covering qualification and every round — the equipment controller may release a second in rain or snowfall — and two suits per World Cup or Grand Prix event, per Olympic or World Championship, and per Four Hills Tournament. If a marked suit is altered after approval — arm length, inside leg length, cut — the equipment controller deactivates its chips. The suit is then dead: it cannot be repaired back into legality or replaced.

Skis: 145% of height, but only at BMI 21

Ski length is not a flat percentage of height. The ceiling of 145% applies only to athletes at a body mass index of at least 21, for men and women alike. Below that, a grading table removes half a percentage point of ski for every 0.125 of BMI lost.

Worked example. A jumper 1.80 m tall reaches BMI 21.000 at 68.1 kg and is entitled to skis of 145.0% x 180 cm = 261 cm. At 66.5 kg the same jumper sits at BMI 20.500, the ceiling drops to 143.0%, and the legal ski becomes 143.0% x 180 cm = 257.4 cm, rounded to 257 cm. Losing 1.6 kg costs four centimeters of wing. That trade is the whole design intent of the rule. Youth competitions use a flat 140% of body height with no BMI formula at all.

Body weight for this calculation is controlled in ski jumping underwear, without helmet, goggles, gloves, boots, wedges, suit or bib.

The rest of the flying surface

Boot soles may not exceed 40 mm at the heel, and boot sole plus binding wedge together may not exceed 50 mm; the rear lean angle of the boot must not fall below 65 degrees. The gap between the outside of the helmet and the head may not exceed 7 cm at any point. Gloves are compulsory, must have fingers — mittens are banned — must not exceed 7 mm in cumulative thickness, and end 7 cm past the ulna toward the shoulder, with the sleeve forbidden from being fixed around them. Underwear is single-layer, no part thicker than 1.5 mm and no more than 3 mm cumulative at the seams. The binding must be mounted so that no more than 57% of the ski length runs ahead of the boot cap.

Yellow and red cards for equipment

FIS runs a card system for equipment violations, introduced on 1 November 2025 and still in force for 2026/27. Every voluntary equipment violation produces a yellow card; an involuntary one does not. Yellow cards are recorded in the FIS database and printed on every subsequent start list for the remainder of the season, and one yellow card still allows the athlete to compete.

A second yellow card in the same season becomes a red card. A red card removes the athlete from the following competition and from two individual competitions; if it was earned at a World Cup, the athlete's national association also loses one quota place for the next event weekend. A second red card in a season costs four individual competitions and the same quota penalty across four events. For a serious breach the jury may award a red card directly, subject to confirmation by the FIS Race Director.

Major events are ring-fenced. At the Olympic Winter Games, World Championships, Ski Flying World Championships, Junior World Championships and Youth Olympic Games, athletes start with no pending yellow cards, and a sanction earned there stays attached to that event only.

Enforcement reaches well beyond the equipment cabin. Sanctions apply across the 3D body scan, the physical body measurement, technical approval, the start area from warm-up to the gate, the hill from the start position to the exit gate, the walk from the exit gate to the equipment control room, and the control areas themselves. FIS may also apply video analysis after the competition.

Equipment control decides who is allowed to fly at all. What the flight is then worth is decided by distance, the five style judges and the wind and gate compensation applied to every jump.

Ski jumping training is year-round and highly specialized:

Wind Tunnel Training

Jumpers regularly train in vertical wind tunnels that simulate flight conditions. They practice holding optimal body position for extended periods, experimenting with micro-adjustments to arm placement, hip angle, and ski spread. Wind tunnel sessions provide immediate feedback — coaches can measure lift and drag forces in real time.

Plastic Summer Hills

Most major ski jumping facilities have plastic-coated in-runs and landing hills that work without snow. Jumpers train on these artificial surfaces from May through October, allowing them to take thousands of training jumps per year. The takeoff and flight phase are nearly identical to winter conditions; only the landing surface differs.

Gym and Physical Training

Ski jumpers need explosive leg power for the takeoff (the "Absprung"), core stability for flight position, and overall body control. Training includes:

• Plyometrics — Box jumps, depth jumps, and single-leg explosive exercises
• Core work, Planks, hanging leg raises, and anti-rotation exercises
• Flexibility, The forward-lean position requires exceptional hip flexibility
• Balance training, Proprioception exercises on unstable surfaces

Video Analysis

Every training jump is recorded from multiple angles. Coaches analyze takeoff timing (ideally 0.25-0.30 seconds from table edge), transition to flight position, V-angle consistency, and landing technique. Current systems overlay aerodynamic data on video footage, showing where lift and drag change throughout the flight.

Mental Training

Ski jumping requires immense mental discipline. Jumpers stand at the top of a 90-meter (or 120-meter) hill and must execute a technically precise takeoff in under a third of a second, then maintain a physically demanding flight position for 6+ seconds. Visualization, breathing techniques, and routine development are key parts of preparation.

The landing hill is specifically engineered to match the jumper's flight trajectory. The hill curves away from horizontal at approximately the same rate that the jumper descends, meaning the actual vertical drop at landing is only about 1-3 meters — comparable to jumping off a table. This is why ski jumpers can land distances of 100+ meters without injury.

The Telemark landing — one foot in front of the other, knees bent, arms spread, is the traditional style that judges reward with higher marks. Beyond aesthetics, it demonstrates control and balance. A two-footed or unsteady landing costs points.

Current landing hills also feature knoll points (K-point) and hill size (HS) markers. The K-point is the engineered "target" distance where the landing hill begins to flatten. Landing near or beyond the K-point scores the most distance points. The HS is the maximum safe landing distance — jumps beyond this are rare and potentially dangerous.