The Verification Venue · a record that its own physics makes almost beside the point
The Fall That Doesn't Depend on Its Height
On 26 January 1972 a bomb tore JAT Flight 367 apart over Czechoslovakia. Of the 28 aboard, 27 died. The flight attendant Vesna Vulović, pinned in a section of fuselage, lived — and Guinness recognised it as the highest fall survived without a parachute: 10,160 m. Here is the strange part: past a few hundred metres, a falling body stops speeding up. So a fall from 800 m and a fall from 10,160 m hit the ground at almost the same speed — which means the survival is astonishing regardless of how high she really started.
Fall long enough and air drag balances gravity: you reach terminal velocity and stop accelerating. It happens fast — within the first few hundred metres. Everything above that adds fall time, not impact speed. Drag the release altitude below and watch the big number. Above roughly 800 m it barely twitches.
Speed at the ground
— m/s
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Compared with a fall from 800 m
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Drag from 300 m up to the record's 10,160 m. Watch the impact speed climb steeply at first, then flatten and refuse to move.
The equation is the plain one: gravity pulls down, air pushes back in proportion to speed squared, and the body settles at the speed where they cancel. That balance speed is terminal velocity:
The page integrates the full equation of motion — m·dv/dt = m·g − ½·ρ(y)·C_d·A·v² — down through the real, thinning atmosphere, so the speed you read at the ground is the honest one, not a textbook shortcut:
For a spread human body that balance sits near 50 m/s (about 180 km/h, 112 mph). The body reaches 99% of it within about 500 m of falling. That is the whole point: from 800 m up, you have already stopped speeding up, so the record altitude is nearly irrelevant to how hard you hit. There is a twist the constant-speed picture misses — high in the thin air a body dropped from 10 km actually overspeeds, breaking 80 m/s where the air is one-third as dense, and then the thick air near the ground brakes it back down to ~50 m/s. Either way it arrives at the same speed it would from 800 m.
The check — every speed recomputed in front of you
Impact speeds below are the result of integrating the equation of motion through the standard atmosphere (ISA). The instrument does the same integration live; the verifier does it a third, independent way. Nothing here is a hand-entered "answer."
| release altitude | human impact | % of vt | fuselage impact | % of vt |
|---|---|---|---|---|
| 300 m | 47.8 m/s | 95% | 60.7 m/s | 80% |
| 800 m | 50.4 m/s | 101% | 73.7 m/s | 97% |
| 2,600 m | 50.4 m/s | 101% | 76.7 m/s | 101% |
| 10,160 m (record) | 50.4 m/s | 101% | 76.7 m/s | 101% |
The green column is the punchline, not a claim: for a human body, 800 m and 10,160 m both land at 50.4 m/s — identical to the tenth of a metre per second. Terminal velocity at sea level is 50.1 m/s; the tiny overshoot to 50.4 is that thin-air overspeed still bleeding off at touchdown.
The honest caveat (amber cell): a denser, tumbling fuselage fragment has a higher terminal velocity (75.6 m/s) reached over a longer distance (~1,140 m), so it is still speeding up at 800 m — 73.7 m/s there versus 76.7 m/s from the record height, a real ~4% gap. The clean "same impact from any height" holds tightly for a free human body, only approximately for a dense fragment. We show both rather than overclaim one.
The record itself, converted: 10,160 m = 33,330 ft = 6.31 mi (Guinness); the 1972 investigation placed the break-up near 10,050 m. Run every number yourself: node research/the-longest-fall-survived/verify.mjs.
Which altitude is true — and why the physics makes it bearable that we can't say
Guinness awarded the record in 1985; Paul McCartney presented it at a London gala. The figure traces to the official 1972 investigation — a joint Czechoslovak–Yugoslav inquiry whose black boxes were opened and read in Amsterdam by Czechoslovak, Yugoslav and Dutch experts.
On 8 January 2009 an ARD/Tagesschau report by journalists Peter Hornung and Pavel Theiner argued the aircraft was most likely shot down by a Czechoslovak MiG only a few hundred metres up — with the high-altitude figure a Cold-War cover-up. It is a striking story, and it is not proven: Hornung himself conceded the case was circumstantial — "only indications, no evidence" — the Czech Civil Aviation Authority dismissed it as media speculation, and a military expert noted that radar and 150–200 investigators make such a cover-up implausible. Vulović called it "nebulous nonsense."
So the venue is honest about a hard limit: from public evidence, neither the exact record height nor the shoot-down revision can be independently proven. The raw black-box readouts are not public; the 10,160 m figure rests on a Cold-War-era joint investigation whose neutrality the 2009 journalists questioned; and the revision that questions it is itself an unproven theory that could harden into a new myth. What the instrument shows is why that unresolved gap is tolerable: at 800 m or at 10,160 m, the ground arrives at roughly the same speed. The survival is the astonishing, well-documented fact. The altitude is a contested number the survival never actually depended on.
What's exactly true, what's idealised, and the limits of what can be verified
Exactly true (the physics)
Terminal velocity is real and is reached quickly. A body falling from rest under quadratic drag approaches v_t = √(2mg/(ρC_dA)); with constant density the closed form is v(h) = v_t·√(1 − e^(−2gh/v_t²)), which reaches 95% of v_t by ~300 m and 99% by ~500 m for a human body. The instrument does not use this shortcut — it numerically integrates the full equation of motion with height-varying air density (RK4), which is why the 10,160 m drop shows an overshoot (thin air aloft → higher local terminal velocity → peak ~81 m/s near 9 km) that then decays as the body enters denser air. The impact-speed conclusion is robust to which model you use.
Idealised / free choices (named)
Body parameters are representative, not measured. The human body uses m = 80 kg, C_d = 1.0, A = 0.51 m² at sea-level air density ρ₀ = 1.225 kg/m³, giving v_t ≈ 50.1 m/s. Posture, mass, clothing and area all move this; the widely-quoted belly-to-earth figure is ~120 mph (≈54 m/s), and our ~112 mph sits at the low edge of that band. The fuselage fragment is explicitly illustrative — m = 500 kg, C_d = 1.0, A = 1.4 m² chosen to show a higher ballistic coefficient; we do not know the actual mass or area of the wreckage section Vulović fell in, and we make no claim about it. The atmosphere is the ISA troposphere model (linear temperature lapse to 11 km); real weather and the exact 1972 conditions differ.
Impact speed is not survivability. The page computes the speed a body meets the ground at — not whether that is survivable, which depends entirely on what happens in the final metres (deceleration distance, what you strike, what you are wrapped in). Vulović's survival is attributed to being trapped by a food trolley inside a fuselage section that struck a snow-covered, wooded slope, and to a villager, Bruno Honke — a former WWII medic — who kept her alive until help came. The physics here explains why the record altitude is nearly irrelevant; it does not explain the survival, and does not claim to.
What can and cannot be verified (the history)
Can confirm: the crash (DC-9-32, YU-AHT, 26 Jan 1972; 27 of 28 killed); the sole survival and catastrophic injuries (fractured skull, cerebral haemorrhage, crushed vertebrae, broken pelvis and legs, temporary paralysis, a recovery of roughly 16 months); the 1985 Guinness recognition at 10,160 m presented by Paul McCartney; that the 1972 investigation reported the break-up near 10,050 m; and that the 2009 ARD/Tagesschau report and its authors' own concession ("only indications, no evidence") exist.
Cannot confirm: the true break-up altitude from public primary data — the raw black-box readouts are not public. The 10,160 m figure is attributed to the 1972 joint investigation and Guinness, not independently audited here. The 2009 shoot-down theory is unproven and disputed: its own author calls it circumstantial, the CAA rejects it, and the radar/investigator argument cuts against it. We present the dispute symmetrically — neither "10,160 m is settled fact" nor "she really fell only 800 m" is established.
Named disagreements in the record. Sources conflict on how long Vulović was in a coma (3, 10, and 27 days all appear) — we do not silently pick one. The bombing is attributed to suspected Croatian émigré nationalists; no one was ever arrested or convicted. The scope of the record is precise: "highest fall survived without a parachute, as recognised by Guinness" — not a claim about the highest fall any human has ever survived.
Sourcing note. The 2009 broadcast is cited here via English secondary coverage (Wikipedia's cited version and the aviation writer Sylvia Wrigley) alongside the ARD report itself; we did not audit the original German broadcast frame by frame.