https://matteocampagna.com/en/registry/competition/crosswind-against-head-and-tail-wind Changes to this claim in Matteo Campagna's evidence registry: its status, its year-by-year history, revisions of the page. en-gb https://matteocampagna.com/en/registry/competition/crosswind-against-head-and-tail-windThe comparison exists, but all of it comes from calculation. The first, in 2011, concerns a compound arrow: at 70 m three metres per second of wind taken head on or from behind changes the height of impact by only 24 millimetres, far less than the same wind moves it sideways. For the recurve two independent simulations of arrow flight, built on measured aerodynamic parameters, say the same thing: at 70 m, in three metres per second of wind, a crosswind moves the point of impact by 26 or 36 centimetres depending on the model, while the same wind taken head on or from behind moves it between 8 and 10. The gap between the two crosswind figures, about a third, shows how much the modelling assumptions matter; the direction of the answer does not change. The more recent model adds that crosswind drift grows almost in proportion to wind speed, while head and tail winds stay within a few centimetres across the whole useful range, and that a head wind displaces the arrow slightly more than a tail wind, by seven millimetres. Nobody has measured any of this with archers on a field, and a cruder calculation shows that even a wind too light to feel, 0.3 metres per second, is already worth two centimetres at seventy metres. That is why the claim stays transferred: it stands on physics, not on competition measurements.claim:vento-laterale-frontale:revision:2026-06-25:2Thu, 25 Jun 2026 08:00:00 GMT https://matteocampagna.com/en/registry/competition/crosswind-against-head-and-tail-wind#storiaA second simulation, independent of the first and using computational fluid dynamics, confirms the direction of the result and revises the size: at 70 m, in three metres per second, 25.8 centimetres of crosswind drift against 8.5 for a head wind and 7.8 for a tail wind, with crosswind drift growing almost in proportion to wind speed. The same paper compares the model with target photographs from a World Cup. Three models agreeing and no measurement with archers on a field: it stays transferred.claim:vento-laterale-frontale:history_entry:2026-06-22:2025Mon, 22 Jun 2026 08:00:00 GMT https://matteocampagna.com/en/registry/competition/crosswind-against-head-and-tail-wind#storiaThe author of the 2011 calculation reruns it for the recurve with a model that lets the shaft flex: in a steady three metres per second crosswind an X10 600 drifts 245 to 261 millimetres at 70 m depending on point weight, more than four 61 millimetre rings, and a compound arrow at 50 m drifts 75 millimetres. It looks only at the crosswind, so it adds nothing to the comparison between directions, but it gives its scale in rings. Still a model: it stays transferred.claim:vento-laterale-frontale:history_entry:2026-06-22:2020Mon, 22 Jun 2026 08:00:00 GMT https://matteocampagna.com/en/registry/competition/crosswind-against-head-and-tail-wind#storiaThe first calculation for the recurve arrives, and it says the same thing: a simulation of the flight of an A/C/E arrow at 57.3 metres per second, with aerodynamic parameters measured in a wind tunnel, gives a radial deviation of 36 centimetres at 70 m in three metres per second of crosswind, against ten centimetres for a head wind and nine for a tail wind, and the crosswind figure triples as the wind goes from one to three metres per second. It is a model with no participants, so the status is transferred.claim:vento-laterale-frontale:history_entry:2026-06-22:2018Mon, 22 Jun 2026 08:00:00 GMT https://matteocampagna.com/en/registry/competition/crosswind-against-head-and-tail-wind#storiaThe first calculation to set the wind directions side by side concerns the compound. A ballistic model of a Protour 470 arrow launched at 79.2 metres per second gives a lateral drift that is linear with wind speed and grows roughly with the square of the distance, while three metres per second taken head on or from behind changes the height of impact at 70 m by only 24 millimetres: for the author a crosswind is far more demanding for the archer. No archer is measured: the checks on the calculation use a shooting machine, in a wind tunnel over ten metres and outdoors at 70 m, and only for crosswind at that. Transferred.claim:vento-laterale-frontale:history_entry:2026-06-22:2011Mon, 22 Jun 2026 08:00:00 GMT https://matteocampagna.com/en/registry/competition/crosswind-against-head-and-tail-windclaim:vento-laterale-frontale:new_claim:2026-02-25:trasferitoWed, 25 Feb 2026 08:00:00 GMT